Dynatuner FM-1 Assembly instructions
INSTRUCTIONS
FOR
ASSEMBLY
ALIGNMENT
OPERATION
SERIAL
NUMBER
94.t2029
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in
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communica-
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11629
SPECIFICATIONS
BASED
ON
IHFM
STANDARD
T-l00
Useable
Sensitivity:
4
microvolts
for
total
noise
and
dis-
tortion
30
db
below
100%
modulation
Signal-to-Noise
Ratio:
70
db
below
100%
modulation
level
Harmonic
Distortion:
less
than
0.25%
@
100%
modulation
Drift:
less
than
0.03%
Frequency
Response:
±0.25
db
20
cps
to
20
KC
±0.5
db
10
cps
to
40
KC
Capture
Ratio:
5
db
Selectfvlty:
54
db
Audio
Hum:
73
db
below 1
volt
output
AM
Suppression:
greater
than
63
db
ADDITIONAL SPECIFICATIONS
1M
Distortion:
less
than
0.5%
from
10
microvolts
to
100,000
microvolts
@
100%
modulation
Audio
Output:
2
volts
@
100%
modulation
Output
Impedance:
less
than
5000
ohms
Discriminator
Peak
to
Peak
Separation:
greater
than
900
KC
Antenna
Input:
300 n
balanced
75 n
unbalanced
Dial
Calibration
Accuracy:
0.2%
Power
Consumption:
50
watts
DYNATUNER
FM-1
DESCRIPTION
In
sclCl'ting
the
Dynatuner
for
your
FM
receiver
you
have
chosen
one
of
the
most
intensively
engineered
high
fidelity
components
on
the
market
today.
The
Dynatuner
is afresh
engineering
concept,
not
an
adaptation
of
an
existing-
production
design,
To
produce
a
tuner
having
optimum
performance.
every
portion
of
the
circuit
has
been
carefully
investigated
in
terms
both
of
performance
maxima
and'
of
the
overall
stability
of
opera-
tion
and
simplicity
of
adjustment
required
of
a
kit
design.
The
result
of
this
effort
is a
tuner
which
provides
the
same
top
performance
in
your
home
as
it
does
in
the
Ik1boratory.
Without
any
test
equipment
-just
following
the
simple
adjustment
procedures
in
this
manual-the
kit
huilder
will
achieve
the
high
performance
normally
obtain-
able
only
with
laboratory
test
and
alignment
equipment.
There
is
no
longer
any
question
whether
adjustments
have
shifted
during
shipping
and
handling
as
frequently
happens
with
FM
tuners.
In
the
Dynatuner
all
adjustments
can
be
easily
checked;
and,
of
course,
the
periodic:
main-
tenance
required
of
all
tuners
is
simply
and
easily
made
without
a
trip
to
the
serviceman.
This
adjusting
technique
has
been
obtained
without
any
sacrifice
in
tuner
per-
formance,
In
falt.
the
converse
is
true.
The
care
and
control
necessary
to
make
these
adjustments
absolutely
reproduci-
ble
h8.s
rm;ultA~d
in a
significantly
hi/1;her level
of
performance
comhined
with
the
required
stability.
In
addition
to
the
adjustment
requirements,
the
basic
Aengineering
objective
was
to
produce
a
tuncr
design
of
•
adequate
sensitivity
for
fringe
area
reception,
with
dis-
tortion
levels
of
the
recovered
audio
signal
coml1arahle
to
that
measured
on
the
best
of
audio
amplifiers.
The
significant
advantages
of
etched
cireuit
construction
in
terms
of
reliahility,
reproducibility
and
durability
are
amply
demonst.rated
in
the
Dynatuner.
Their
use
has
further
accomplished
the
ultimate
goal
of
improved
per-
formam'e,
In
no
ot.her
t.unerkit
or
factory
wired
has
exact
component
placement
and
lead
layout
been
so
accurately
defined.
The
excellent
specifications
of
the
Dynatuncr
arc
possible,
and
guaranteeablc,
unit
to
unit,
lab
model
to
production
kit,
because
of
the
extraordinary
uniformity
which
etched
circuits
provide,
and
the
inherent
Htability
of
the
circuit
mn.(iguration.
Therc
has
been
no
intent
to
enter
the
sensitivity
specifica-
tion
race
(claims
often
engineered
by
the
advertising
department).
However.
uHing
the
sensitivity
standards
proposed
by
t.he
Inst.itute
of
High
Fidelity
Manufacturers,
this
tuner
belongs
in
the
highly
sensitive
class
and,
in
fact,
will
provide
listenable
reception
of
mOl'e
stations
than
tuners
of
ostensibly
higher
sensitivity
rating.
The
concentration
of
effort
to
reduce
distortion
has
also
produced
a
tuner
which
is
unquestionably
the
lowest
distortion
receiver
on
the
market
today.
There
are
many
parameters
in
addition
to
sensitivity
and
distortion
which
are
part
of
a
completely
satisfactory
tuner
design,
Some
are
measurable;
some
are
intangible.
Extensive
field
testing
under
adverse
and
marginal
con-
Aditions
has
proven
the
Dynatuner
to
be
as
fine a
tuner
as
"can
be
obtained
today
regardless
of
price
or
specification
claims,
The
circuit
consists
of:
1.
Cathode
coupled
tuned
R.F,
amplifier
stage
using
a
6AQ8,ECCB5
high
conductallce
dual
high
frequency
triode.
2.
Screen
coupled
oscillator-mixer
stage
using
a
6ATBA
high
conversion
triode-pentode.
3.
Four
I.F.
amplifier
stages
with
progressive
limiting
using
two
6BA6
and
two
6AU6
tubes.
4.
Balanced
wide
band
discriminator
with
makhed
semi-condudor
diodes.
5.
Cathode
follower
providing
detector
isolation
to
the
de-emphasis
network
and
multiplex
take-
off
using
one
half
of
a
12AX7/ECC83.
6.
Plate
follower
wide
band
feedback
audio
output
stage
using
the
other
half
of
the
12AX7,'ECC83.
7.
Tuning
indicator
6FG6/EM84.
8,
Power
supply
and
rectifier
6V
4,
EZ80.
The
Antenna
Circuit
Provision
is
made
to
match
either
a75
ohm
unbalanced
or
a
300
ohm
balanced
transmission
line
thus
accommodat-
ing
any
standard
antenna
array
used
for
FM
reception.
The R.F.
Stage
The
cathode
coupled
dual
triode
R.F.
amplifier
circuit
was
chosen
for
the
input
stage.
It
combines
the
high
gain
and
low
noise
figures
of
the
commonly
used
grounded
grid
input
with
a
tuneable
input
a
necessary
feature
to
prevent
overloading
from
strong
loeal
signals
when
tuning
weak
signals,
Other
more
complex
circuits
have
slightly
better
theoreti-
cal
noise
thresholds.
However.
galactic
noise levels
at
100
megacycles
are
of
sufficient
magnitude
to
prevent
complete
utilization
of
this
theoretical
difference
and
the
less
com-
plex
cathode
coupled
stage
closely
approaches
optimum
field result.s.
The
Oscillator-Mixer
The
triode
section
of
the
6AT8A
is
used
in
1.1
"tickler
feedback"
tUlled
grid
oscillator
circuit.
Careful
temperature
stabilization
and
choice
of
operating
parameters
result
in
an
oscillator
circuit
with
sufficient
stability
to
obviate
any
need
for
automatic
frequency
control
with
its
inherent
degradation
of
the
audio
signal.
The
pentode
section
of
the
6AT8A
is
used
as
the
mixer.
The
tube
is
self-biased
for
maximum
conversion
efficiency.
The
oscillator
is
injected
into
the
screen
circuit
to
provide
complete
isolation
of
the
oscillator
tuning
circuit
from
the
signal
tuning
circuit
at
the
mixer
grid.
Oscillator
drag
(change
in
oscillator
frequency
as
the
mixer
tuning
is
adjusted)
is
nonexistent,
greatly
simplifying
the
adjust-
ment
and
tracking
of
the
front
end.
This
isolation
also
reduces
re-radiation
of
the
oscillator
energy
into
the
antenna
which
might
cause
interference
in
other
nearby
receivers
and
television
sets.
Circuit
constants
of
the
oscillator
and
mixer
circuits
have
been
adjusted
to
give
uniform
sensitivity
over
the
entire
FM
band.
1
2
Tlte I.F.
Amplifiers
and
Limiters
Phase
shift
in
an
FM
signal
corresponds
to
amplitude
non-linearity
or
distortion
in
an
AM
signal
or
in
an
audio
amplifier. Accordingly,
the
I.F.
amplifier
circuits
were
designed
for
minimum
phase
shift
across
the
pass
band.
Since
this
occurs
with
undercoupled
transformers,
the
alignment
of
the
I.F.
section
is
greatly
simplified.
Simple
peak
tuning
(tuning
for
maximum
signal)
is
the
optimum
adjustment
for
the
undercoupled
I.F.
transformers.
This
minimum
phase
shift
approach
maintains
low
distortion
of
the
audio
signal
all
the
way
down
into
the
noise
and
permits
useful
reception
of
weak
signals
even
without
full
limjting
action.
'
A
6BA6
variable-mu
pentode
is used for
the
first
and
second
I.F.
stages,
and
6AU6
sharp-cutoff
pentodes
are
used
for
the
succeeding
two
stages.
Each
I.F.
stage
acts
as
a
limiter
when
the
signal
input
to
that
stage
reaches
a
pre-determined
point,
Thus
no
automatic
volume
control
circuit
is
needed
and
no
additional
recovery
time
constants
exist
to
introduce
delay
on
fading
signals.
There
is suffi-
cient
gain
in
the
receiver
so
that
the
last
limiter
is effective
on
input
noise.
Tlte Oiscriminator
A
balanced-bridge
discriminator
configuration
is used
in
place
of
the
conventional
unbalanced
circuit.'
This
circuit
balances
out
any
noise
ane
signal
rectification
occurring
in
the
plate
circuit
of
the
last
limiter
tube
and
is
the
key
to
the
phenomenally
low
distortion
figures
achieved
by
the
Dynatuner.
Awide
band
discriminator
transformer
is
used
to
obtain
the
full
benefit
of
this
design,
and
matched
semi-
conductor
diodes
are
used
in
place
of
vacuum
tubes
to
avoid
heater
hum
at
this
critical
point
in
the
circuit.
The
balancing
action
of
this
circuit
reduces
the
inter-
channel
noise
(between
stations)
by
a
factor
as
great
as
10
db
in
level
over
many
conventional
tuners
which
use
limiter-discriminator
circuits.
Tlte Audio Section
The
first
section
of
the
12AX7
dual
triode
is used
as
a
direct-coupled
cathode
follower
between
the
discriminator
and
the
de-emphasis
network.
This
prevents
loading
of
the
high
impedance
discriminator
circuit
by
the
de-emphasis
network
with
its
consequent
reduction
of
high
frequency
transient
(square
wave)
response. Alow
impedance
de-emphasis
network
is
used
to
feed
the
volume
control
of
the
tuner
directly.
Also a
multiplex
take-off
point
is
provided
at
low
impedance
which
will
not
affect
the
regular
operation
of
the
tuner.
The
second
section
of
the
12AX7
is afeed
hack
"plate
follower"
audio
amplifier
compensated
for
the
very
wide-
band
response
inherent
in
the
rest
of
the
tuner
circuitry.
Tlte Tuning Eye
In
operation
this
eye
acts
as
an
indicator
showing
when
a
station
is
tuned
properly,
and
is
connected
through
the
appropriate
network
to
the
last
limiter
grid
circuit.
During
a
portion
of
the
alignment
procedure,
the
eye
is
connected
to
other
specified
parts
of
the
circuit
to
indicate
correct
alignment.
This
is
the
only
instrument
required
during
the
alignment
procedure.
The
operating
point
of
the
eye
has
been
set
for
extremely
precise
indication
of
the
optimum
tuning
(or
alignment)
condition,
and
is a
more
accurate
indicator
than
tuning
meters.
The
action
of
the
eye
in
tuning
is
very
sensitive.
It
wil
indicate
asignal
as
low
as
1
microvolt;
it
approaches
maximum
closure
at
10
microvolts-yet
it
cannot
be
over-
lapped
at
higher
signal
strengths.
The
center
of
channel
is
always
indicated
precisely.
There
is no
"flat
spot"
in
tuning.
Tlte
Power
Supply
The
power
supply
is a
conventional
full
wave
"pi"
rectifier
using
a
6V4/EZ80
rectifier.
Additional
power
handling
capability
is
included
to
power
a
Dynaco
multiplex
adapter
in
the
space
provided
on
the
chassis.
The
Dynatuner
is
engineered
to
provide
the
finest
available
overall
performance.
It
is also
designed
to
main-
tain
this
performance
level for
many
years.
Unlike
other
tuners
which
must
be
factory
aligned
to
give
rated
perform.
ance,
the
Dynatuner
can
be
adjusted
to,
and
kept
at
optimum
performance
by
its
owner.
USING
YOUR
DYNATUNER
Your
Dynatuner
has
been
designed
to
give
you
the
highest
quality
of
FM
reception
combined
with
permanence
of
its
excellent
operating
characteristics.
Afew
moments
learning
how
to
use
it
will
amply
repay
you
with
increased
satisfaction.
The
tuner
must
be
connected
to
either
a
preamplifier
or
directly
to
an
amplifier
using
shielded
cable
of
the
type
supplied.
It
is
acceptable
to
use
cable
lengths
up
to
25 feet
if
the
tuner
is
required
to
be
located
away
from
the
associ-
ated
equipment.
The
audio
cable
can
be plugged
into
either
of
the
two
output
sockets
as
nonnally
wired.
The
second
socket
can
be
used
to
connect
to
the
other
channel
of
a
stereophonic
system
or
to
a
tape
recorder,
or
it
can
be
left
unused.
Later,
if
you
wish
to
add
a
Dynaco
multiplex
adapter,
the
extra
socket
will
be
the
output
for
the
second
stereo
channel
by
connecting
it
internally
to
the
adapter,
for
which
space
has
been
left
on
the
chassis.
The
extra
socket
can
also
be
connected
to
the
multiplex
output
of
the
tuner
for use
with
external
adapters.
See
the
Appendix
for specific
informa-
tion
on
this.
The
front
panel
controls
of
the
Dynatuner
have
been
made
as
simple
to
use
as
possible.
The
function
of
the
on-off
switch
is
obvious.
This
switch
also
controls
the
AC
outlet
on
the
rear
of
the
tuner
so
that
it
is possible,
if
desired,
to
turn
both
tuner
and
amplifier, for
example,
on
and
off
simultaneously.
It
is also possible
when
using
the
Dynatuner
with
equipment
which
has
additional
switching
facility,
such
as
the
Dyna
PAS-2,
to
leave
the
on-off
switch
"on"
and
use
the
auxiliary
equipment
for
all
the
switching.
The
tuning
knob
of
the
Dynatuner
enables
tuning
frome\
one
end
of
the
FM
band
to
the
other.
By
observing
the
tuning
eye,
it
is
simple
to
see precisely
when
a
station
is in
tune.
The
eye
rea<:he.s
maximum
closure
when
the
tuning
is
corred.
and
the
accuracy
of
tuning
is
greatest
when
watch-
ing
the
eye,
rather
than
trying
to
set
to
a
given
frequency
as
indicated
on
the
tuning
dial.
e
The
volume
control
of
the
Dynatuner
has
two
possible
functions.
If
the
tuner
is
used
with
a
basic
power
amplifier,
then
this
operates
as
a
conventional
volume
control.
When
used
with
equipment
which
has
a
central
volume
control,
such
as
a
Dyna
pream}Jlifier.
the
Dynatuner
volume
control
is
used
merely
to
set
the
output
of
the
tuner
to
correspond
with
the
output
of
other
program
sources
so
that
there
is
no
need
to
re-adjust
the
volume
when
switching
from
one
program
source
to
another.
Normally
in
this
usage,
the
Dynatuner's
volume
control
will
be
operated
almost
fully
clockwise,
depending
on
the
signal
level
of
other
equipment.
All
tuners
using
vacuum
tubes
generate
heat.
In
the
Dynatuner
the
('omponent
parts
have
been
selected
with
this
in
mind.
Because
the
tuner
has
been
designed
with
the
cover
as
an
int.egral
part,
the
unit
in
effect
creat.es
its
own
thermal
environment,
and
adequate
allowance
has
been
made
in
the
design
for
this
nonnal
temperature
rise.
The
Dynatuner
should
not
be
used
in a
confined
space.
It
should
be
remembered
that.
the
heat
generated
is
equivalent
to
a
fiO
watt
light
bulb,
and
adequate
ventilation
must
be
allowed
above
it.
When
used
with
the
Dyna
PAS-2,
for
example,
the
Dynatuner
may
be
placed
on
top
of
the
PAS-2.
bulnot
below
it.
For
most
met.ropolitan
area
use,
a
very
small,
simple
ant.enna
such
as
a
four
foot
piece
of
wire
secured
to
either
of
the
sc.rews
marked
30QU,
is
adequate
with
the
Dynatuner.
However,
twin-lead
wire
is
included
in
this
kit
to
provide
a
folded
dipole
antenna
quite
suitable
for
most
indoor
use.
Instructions
for
this
are
given
in
the
Appendix.
'I
In
extremely
difficult
reception
areas.
it
is
sometimes
'-
necessary
to
use
11
coaxial
cable
for
the
antenna
lead-in
connection.
The
Dynatuner
has
provision
for
using
this
type
of
lead-in
by
connecting
to
the
center
and
one
outer
screw
on
the
antenna
input
(marked
75n
on
the
bottom
plate).
For
reception
in
fringe
areas,
high
gain
antenna
arrays
are
frequently
required,
and
your
dealer
can
advise
you
on
the
use
of
these
with
your
Dynatuner.
The
extreme
sensi-
tivity
of
your
Dynatuner,
coupled
with
its
excellent
limiting
action
on
very
weak
signals,
may
well
enable
you
to
listen
to
stations
you
have
not
received
before,
when
this
tuner
is
coupled
with
a
properly
designed
antenna.
GENERAL
WIRING
PRACTICE
Assembly
of
the
Dynatuner
is
quite
simple
compared
to
general
kit
assembly
requirements.
Parts
are
out
in
the
open
in a
free
and
uncluttered
layout
so
there
is
easy
accessibility
for
wiring
or
troubleshooting
purposes.
Con-
struction
and
alignment
of
your
Dynatuner
should
not
take
more
than
eight
hours
because
of
these
simplifications.
Upon
opening
your
kit,
check
the
components
with
the
parts
list.
FamiJiarize
yourself
with
the
components;
they
can
be
identified
by
comparison
with
the
pictorial.diagram,
by
specified
color
coding.
and
by
pictorial
detail.
_
Tools
required
for
easy
assembly
of
your
Dynatuner
are
a
soldering
iron
(small
tip)
or
soldering
gun,
long
nose
pliers,
screwdriver,
and
wire
cutters.
Although
not
essential.
a
low-cost
wire
stripper
and
cutter
of
the
type
which
can
be
purchased
for
less
than
a
dollar
will g-reatly
facilitate
cutting
and
stripping
the
various
wires
in
t.he
kit.
A
special
alignment
tool
is
provided
with
t.he
kit.
Good
soldering
technique
is
essential
to
satisfactory
rCRults
from
any
electronic
equipment.
ALL
SOLDERING
MUST
BE
DONE
WITH
ROSIN
CORE
SOLDER.
There
is
no
warranty
on
any
equipment
in
which
acid
core
solder
has
been
used.
Make
sure
that
the
solder
is
plainly
marked
"Rosin
Core."
If
you
have
solder
on
hand
the
origin
of
which
is
doubtful,
it
is wise
to
obtain
new
50/50
or
60/40
rosin
core
solder.
Whencver
soldering
i(i
required
from
point
to
point,
the
assembly
instructions
specify
it
by
"(S)."
If
this
symbol
is
not
shown
after
a
connection
is
specified,
it
indicates
that
further
connections
will
be
made
at
that
point
before
soldering.
Soldering
is
accompLished
by
heating
the
joint
with
the
iron
unt.il
solder
is
hot
enough
to
flow
when
tou(:hed
to
the
ioint.
It
is
not
desirabLe
to
feed
the
solder
to
the
iron.
Solder
should
be
fed
to
the
junction
of
iron
and
heated
joint.
After
the
solder
flows, t.he
iron
should
be
held
in
place
for a
few
seconds
and
removed
when
it
is
seen
that
the
solder
has
contacted
both
parts
of
the
connection
.
The
lug
and
the
wire
connected
to
it.
It
should
not
show
a
hall
of
solder,
but
a
smooth
transitiOIl
from
solder
to
component
lead.
When
soldering
apart to
the
etched
circuit
board.
the
solder
must
completely
surround
the
wire
lead
wherp
it
comes
through
thp
board.
Do
not
apply
excessive
Ijolder,
hut
do
not
hesitate
fa
apply
sufficient
hl'(/!
to assure a
smool
II
flow
of
solder
all
around
the
lead
and
Ollto
the
board.
In
the
case
of
point
to
point
wiring.
before
applying
solder
the
joint
should
be
clean
and
t.he
lead
should
be
crimped
in
place
for
mechanical
strength.
It
is
not
neces-
sary
or
desirable
to
wrap
leads
around
contaets
many
times.
A
single
tum
and
pinching
together
with
pliers
is
suitable.
After
soldering
there
shouJd
be
no
play
at
the
joint
if
the
Jead
is
wiggled
with
a
pair
of
pliers. All
soldering
can
be
done
with
a
pencil
type
iron
with
a
low
wattage
rating.
A
small
tip
is
extremely
useful
when
working
in
confined
space.
If
a
soldering
gun
is
employed,
it
should
be
used
with
discretion
since
thp.
amount
of
heat
available
is
far
more
than
required
for
!loldering
light
wires.
You
should
also
be
careful
not
to
use
excessive
solder.
The
smallest
quantity
of
solder
that
makes
a
smooth
contact
between
the
parts
being
soldered
is
best.
Component
leads
should
be
trimmed
as
they
are
used;
the
length
should
be
slJ(~h
that
the
proper
connection
ean
be
made
from
point
to
point
without
strain
on
lugs
or
components.
Most
capacitors
and
coils
used
on
the
printed
circuit
boards
have
pre-cut
leads.
The
leads
of
the
resistors
for
the
boards
should
be
cut
as
described
later.
Care
should
be
exercised
not
to
allow
wires
to
touch
one
another
unless
they
are
actually
connected
to
the
same
point.
The
instructions
which
follow
have
been
arranged
for
simplified
procedure
in
which
the
work
can
be
done
without
interference
between
the
various
portions
of
the
wiring.
It
is
recommended
that
the
instructions
be
followed
on
a
step
by
step
basis,
checking
off
each
step
as
it
is
completed.
The
pictorial
diagrams
should
be
used
for
reference
and
all
connections
checked
against
these
before
going
on
to
the
next
step.
If
the
wiring
is
done
methodically
and
each
step
checked
carefully,
your
tuner
should
work
without
difficulty
as
soon
as
it
is
completed.
3
ASSEMBLY .
INSTRUCTIONS
When
all
of
the
one-half
watt
resistors
are
in
place,
put
the
chassis
bottom
plate
over
them
to
hold
them
in
position
and
carefully
turn
the
board
and
bottom
plate
upside-down.
Solder
each
lead
with
a
small
amount
of
solder.
The
solder
should
flow
smoothly
all
around
the
lead
onto
the
copper.
Cut
off all excess leads. See
detail
A.
After
soldering,
there
should
be
no
space
between
the
bodies
of
the
resistors
and
the
top
of
the
P
board.
If
there
is,
the
resistor
should
be
gentl
pressed
to
the
board
while
the
soldered
leads
are
reheated,
until
the
resistor
is flush
with
the
board.
I
\
NOTE
CAPACITOR
BODY
TOUCHES
BOARD.
DETAIL
"8"
\
2(0Support
the
board
as
in
step
1.
Insert
the
£J
nUcro-
henry
choke
ll2'and
the
heater
choke
I:S.
Wert
all
the
one
watt
resistors.
Insert
the
2.2 mmfd
tubular
capacitor
GJ:1"
(red,
red,
white
and
gray
dots>.
Invert
the
board
and
solder
each
lead
of
these
components
and
trim
off
the
excess.
3(0
Insert
the
two
nine
pin
sockets.
Note
the
location
of
the
flat side
of
each
socket.
Be certain that each
tab goes into its hole
and
does not bend over on top
of
the board.
Seat
each
socket
firmly
to
the
board
and
then
solder
each
pin
an.d
the
center
ground
pin.
4(
to{
Referring
to
the
pictorial
diagram
and
the
values
marked
on
the
individual
capacitors,
insert
all
the
NOTE
BODY
OF
RESISTOR
IS
PRES$EO
TIGHT
TO
BOARD,
MAKE
SOLDER
FLOW
S"'OOTHLY
FROM
LEAD
TO
COPPER.
SNIP
OFF
EXCESS
LEAD
CLOSE
TO
SOLDER.
SNIP
OFr
EXCESS
LEAD
-f}
CORRECT
SOLDER
((
00".""
~
~»)}
?,
DETAil
"A"
Be
sure enough heat reaches both the copper
(J)n
the board
and
the wire to be soldered to
make
asmooth solder junc-
tion.
When
making
connections to the eyelets, be sure that
the solder flows from the wire to the
cyelet
to the board, so
that
the
eyelet
is soldered to the wire
and
to
~he
board at
the same time.
When
installing
components,
be careful
not
to
cover
up
the
identifying
numbers.
Avoid
getting
solder
on
the
outer
%"
edge
of
the
boards.
This
area
contacts
the
chassis when
the
boards
are
mounted
and
solder
splashes
here
will
prevent
a
uniform
contact.
You will
note
that
on
each
etched
circuit
board
all
of
the
component
positions
are
diagrammed
on
the
top
of
the
board
(the
side
without
the
copper).
The
identification
symbol
for
each
component
is
marked
between
the
holes.
into
which
its
leads
will be
inserted.
Resistors
may
be
identified
by
comparing
them
with
the
color
code
provided
on
the
parts
list.
Each
disc
capacitor
is
marked
with
its
value
and
any
special
characteristics.
Other
special com-
ponents
will
be
identified
as
they
are
called
for
in
the
assembly
process.
Assembly
of
the
R..F.
circuit
board
PC-7
1(0'
Position
the
PC-7
etched
circuit
board
in
front
of
you
according
to
the
pictorial
diagram.
Support
the
board
over
an
open
box
or
between
two
objects
so
that
the
leads
from
the
components
may
project
through.
Insert
all
of
the
one-half
watt
resistors
in
their
places
on
the
circuit
board.
To
bend
the
leads
of
each
resistor
to
the
correct
shape,
hold
it
between
the
thumb
and
forefinger
of
one
hand
and
bring
the
thumb
and
forefinger
of
the
other
hand
just
across
the
ends
of
the
body,
bending
the
leads
as
you
do
so.
See
detail
B.
It
will help
in
rechecking
your
work
to
orient
the
color
codes
of
all resistors
uniformly.
YOLI
will first
assemble
the
two
etched
circuit
boards
PC-
7
and
PC-B,
and
then
mount
these
and
the
other
com-
ponents
on
the
chassis
and
complete
the
wiring.
The
Dyna-
tuner's
use
of
etched
circuit
boards,
onto
which
most
of
the
parts
are
mounted,
greatly
simplifies
your
aSsembly
of
the
kit,
and
contributes
strongly
to
its
outstanding
per-
formance. Close
attention
to
the
suggestions
made
here
will
enable
you
to
realize
its
fullest
capabilities.
Before
starting
assembly
of
the
etched
circuit
boards,
observe
detail
A. A
GOOD
SOLDERING
JOB
IS
ESSEN-
TIAL
TO
THE
PERFORMANCE
OF
YOUR
TUNER.
Soldering
to
etched
circuit
boards
is
no
more
difficult
(and
in
some
ways
much
easier)
than
conventional
point-to-point
wiring.
If
any
difficulty is
experienced
in
attempting
to
solder
to
the
copper
sheet
which
is
bonded
to
the
board,
light
rubbing
with
an
ink
eraser
can
clean
the
copper
to
simplify
the
process.
INCORRECT
SOLDER
CONNECTION
=tP
4
8(
&t'~ount
the
1.1".
transformer
Tl
(one
of
the
four
marked
432001)
on
the
board.
Note
the
slot
in
one
corner
of
the
top
of
the
can.
Be
sure
to
mount
the
transformer
with
this
slot
oriented
as
indicated
in
the
pictorial.
The
transformer
should
snap
into
place
and
seat
firmly
against
the
bOArd.
Solder
the
mount-
ing
tab
next
to C12
fir.st,
but
do
not
solder
the
other
mounting
tab.
Solder
each
connecting
lug. Avoid
excessive
heat
but
be
sure
agood connection
is
made.
9(/Insert
the
ground
strapfi
into
their
slots
ill
each
of
the
tube
sockets.
Ohscrvc
the
direction
of
the
offset
in
these
ground
straps
as
shown
in
the
pictorial
diagram.
Solder
both
to
the
board.
B
O(
Insert
a
round,
toothpick
or
similar
instrument
into
eyelets
/f2
and
!'4
from
the
bottom
of
the
board.
The
purpose
of
this
is
to
prevent
solder
from
filling
these
eyelets.
Now
solder
the
eyelets
to
the
copper
on
the
board
and
remove
the
toothpick.
Insert
the
two
heavy
leads
of
the
antenna
coil
Ll
into
eyelets
#2
and
#4.
Note
that
this
coil is
mounted
on
the
bottom
of
the
board,
and
is
oriented
to
align
the
center
slug
with
the
hole in
the
board.
Solder
the
two
leads
to
the
eyelets
on
the
top
of
the
board.
It
may
be
necessary
to
scrape
the
coil leads,
or
to
ream
the
eyelet(s)
slightly
if
the
inside
of
the
eyelet
is
not
perfectly
9free
of
solder,
as
this
is a
very
snug
fit.
f'
i
1,1
(>
Strip
a
1"
piece
of
wire
bare.
Solder
one
end
of
it
to
\--.-
eyelet
!f3
on
the
bottom
of
the
board.
Assembly
01
the
I.F.
Circuit
Board
PC-8
1( .,)" As before,
support
the
board
on
an
open
box
or
between
two
obiect.s so
that
the
leads
will
have
clearance
below
the
board
as
you
insert
components.
Insert
all
of
the
one-half
watt
resistors,
after
bending
their
leads
as
before.
Using
the
bottom
plate,
turn
the
board
over
and
solder
all
of
the
leads.
Cut
off
the
excess leads.
Be
sure
all
the
resistors
are
seated
firmly
against
the
board.
.~,
t::.;:
}-:
J~
\,~,
Fi~'
.1;.<..-
,._-,----.
Q
;;
~
DETAil
D
MOUNTING
CAPACITOR
C8
)DCB .'
:---
=y
\'\
---r-J:-
=,
(
\
~~.~~.
)'
'-- (
,~"
''-,
--------~~
1/
c._,E.)
/,,'
~
~
~0-''-,
,\~
'-,.
TIGHTEN
-
"-"~\>'
I
-)
~",,~
TRIANGULAR
NUT
FIRMLY
..........
" "
WITH
LONG NOSE
PLIERS
'"
'-
Ir-,..
SOLDER
AT
3
POINTS
TO
BOARD
.........
/
'K
~
'.
,:~
"
disc capacit.ors as showIl
in
detail
C.
Make
certain
the
3points.
InsNt
Ow
top lead of
the
capacitor
into
that
the
body
of
the
capacitor
touches
the
board.
the
hole
indicated
in the pictorial, keeping
it
as
short
The
leads
of
the
disc
capacitors
may
be
bent
slightly
as pO:isible,
and
solder
the
lead.
to
prevent
them
from
falling
out
when
the
board
i~-=':-7')
turned
over
for soldering.
Be
careful
not
to
alloy
7V~ount
the
spccifll
temperature
compensating
capaci.
the
lead
to
form
a
"bridge"
to
another
portion
of
thl.---/
.~~r
(;7 (2.55
mmfd
N2200,
with
six color
stripes)
as
circuit.
Solder
each
capacitor
lead. shown in
the
pictorial.
Make
sure
it
is
seated
snugly
agninst
the
hoard
and
against
the
tube
socket.
Solder
5(
/Mount
the
oscillator
coil
L4
(the
one
with
four
both
leads.
leads
at
the
bottom)
in
the
group
of four holes
indicated.
The
two
heavier
leads
are
inserted
in
eyelets
#10
and
#11.
Mount
the
mixer
coil
L3
(the
one
with
only
two
leads
at
the
bottom
and
none
at
the
top)
at
eyelets
#7
and
#8.
Be
sure
it
is
oriented
as
shown
on
the
pictorial
diagram.
Make
sure
each
coil form
is
seated
firmly to
the
board
and
solder
all
of
the
coil
leads.
6(
vr
The
osciIlator
trimmer
capacitor
C8
is
a
white
tubu-
lar
ceramic
form
with
a#6 screw
and
triangular
nut.
The
nut
is
supplied
threaded
onto
the
3,1,,"
screw in
the
hardware
bag.
Be
sure
that
the
points
of
the
nut
face
away
from
the
screw
head,
and
run
the
nut
out
on
the
screw so
that
it
is Ih" from
the
head.
Insert
the
tabs
of
the
capacitor
into
the
matching
cutout
on
the
board.
Note
the
location
of
the
wire
lead.
Hold
the
capacitor
firmly
against
the
board,
and
turn
the
screw
in
from
the
bottom
(see
detail
D)
until
the
triangular
nut
is firmly
seated.
Now
tighten
the
nut
with
long
nose
pliers,
while
pressing
the
capacitor
to
the
board.
The
points
of
the
nut
must
dig
into
the
copper
so
that
the
capacitor
mounting
is
absolutely
rigid.
Solder
the
nut
to
the
board
at
2
M'insert
the
one
watt
and
the
two
watt
resistors
and
the
four
heater
chokes
L6, L
7,
LR
and
L9.
Solder
these
components
in place
and
trim
off
the
excess
leads
on
completion.
3(J(
Mount
the
four
seven
pin
sockets,
being
careful
to
see
that
none
of
the
tabs
are
bent
over
on
top
of
the
board.
Position
them
as
shown
in
the
pictorial.
Mount
the
one
nine
pin
socket,
as
shown.
It
is
necessary
to
first
snip
off
one
of
the
molded
tabs
on
the
side
of
this
socket
in
order
to
clear
the
adjacent
resistor.
This
is easily
done
with
a
pair
of
pliers.
Make
sure
that
each
socket
is
seated
firmly
against
the
board
and
then
solder
all
of
the
pins
and
all
of
the
center
ground
pins.
5
4
(--1'
Insert
all
of
the
disc
capacitors.
As before,
the
leads
of
these
capacitors
may
be
bent
slightly
to
hold
them
in
place,
but
be
careful
that
no
"bridges"
are
formed
to
adjacent
parts
of
the
circuit.
Solder
all
of
these
capacitors.
5(0'Install
the
mylar
capacitor
C29
near
the
V7 socket.
Solder
both
leads
and
cut
off
the
excess.
6(
-{'Insert
the
vertically
mounted
.22
mfd
200
volt
tubular
capacitor
C31
in
its
two
eyelets.
Solder
both
eyelets.
7(vf'
Insert
the
remaining
IF
transformers
1'2,1'3
and
1'4
(all
432001).
Follow
the
location
of
the
slot
at
the
top
of
each
transformer
as
shown in
the
pictorial.
Solder
all
mounting
tabs
and
all
lugs. Avoid exces-
sive solder, which
may
flow
into
the
transformer
and
damage
it.
Make
sure
the
chokes L6
and
1.8
do
not
touch
the
transformers.
The
discI'
imina
tor
trans-
former
1'5
will be
mounted
later.
8(vr-Insert
ground
straps
in
each
of
the
sockets.
Note
the
orientation
of
the
offset.
Solder
these
ground
straps.
9
(6'stall
the
pilot
light
socket
in
the
holes
indicated.
Observe
that
the
connecting
tab
from
the
socket
center
contact
goes
into
the
hole
adjoining
eyelet
fl20.
Do not install it backwards!
Solder
both
tabs.
Chassis
Assembly
1(
~Hold
the
PC-7
board
as
shown
in
the
pictorial,
with
the
J.F.
transformer
away
from
you,
and
carefully
pick
up
the
tuning
capacitor
Cl,
holding
it
so
that
the
shaft
points
away
from
you.
Be
particularly
careful
that
you
do
not
touch
the
semicircular
copper
and
aluminum
colored
plates
of
the
capacitor.
If
these
are
bent,
even
slightly,
it
will be difficult
to
get
the
tuner
to
track
accurately
across
the
dial
when
you
come
to
the
alignment
procedure.
Now
insert
the
small
tabs
which
protrude
from
the
bottom
of
Cl
into
the
corresponding
five holes
in
the
top
of
PC-7. Be careful capacitor
C7
is not damaged.
This
fit
is
especially
snug,
but
be
sure
that
the
capacitor
is
fully
seated
against
the
board.
The
two
threaded
studs
of
the
capacitor
will also
engage
the
board.
2(
Ii'
Mount
the
PC-7-Cl
assembly
on
the
top
of
the
chassis,
locating
it
by
the
four
threaded
studs
of
Cl.
Install
four
sets
of
#6
(medium
size)
lockwashers
and
nuts
on
these
studs
but
do
not
tighten
them.
/!'
3(
~sten
the
PC-7
board
in
place
with
five
sets
of
#4
/(smallest size nickel
plated)
hardware.
Install
the
screws from
the
top,
and
secure
with
a
lockwasher
../J
c.) 6
under
each
nut.
Tighten
these,
and
also
tighten
the
,.......,
/
nuts
on
the
capacitor
studs.
'0(
Mount
the
tuning
capacitor
shield
can,
using
three
/ ( ./..;,'
sets
of
#4
hardware.
Make
sure
the
shield
lies be-
,
~
tween
socket
V2
and
capacitor
C6.
The
tab
of
the
~
shield
is fed
through
the
hole
in
PC-7
for
the
mOWlt-
ing
tab
of
1'1.
Solder
both
of
these
tabs
to
the
board.
5(
~Mount
the
J.F.
circuit
board
PC-8
on
the
top
of
the
chassis.
Note
that
the
mounting
holes
in
the
board
are
not
evenly
spaced
and
the
board
can..
only
be
mounted
in
one
position.
Fasten
with
eight
sets
of
#4
j
hardware.
6(
Mount
the
quadruple
section
electrolytic
capaci-
tor
C32 in
the
center
of
the
chassis.
Note
the
6
identifying
marks
at
each
lug
of
the
capacitor
(semi-
circle,
square,
triangle,
and
blank)
and
orient
the
capacitor
according
to
the
pictorial
diagram.
Fasten
it
rigidily in position
by
twisting
the
four
mounting
lugs
/,:1
turn
with
a
pair
of
pliers.
701
Mount
the
on-off
switch
on
the
front
of
the
chassi .
Use
two
!!4
screws.
Lockwashers
and
nuts
are
not
necessary
as
the
holes in
the
switch
are
threaded.
Follow
the
position
of
the
switch
lugs
shown
in
the
pictorial.
8(
~
Mount
the
three
screw
terminal
strip
with
two
sets
of
#4
hardware.
Note
that
the
terminal
strip
is
mounted
on
the
outside
of
the
rear
fiange
of
the
chassis.
Refer
to
the
pictorial for
proper
orientation.
9(~
Mount
the
fuse
holder
in
the
special 0
shaped
hole.
The
rubber
washer
fits
between
the
shoulder
and
the
outside
of
the
chassis.
Fasten
in place
securely,
but
y
not
tighten
excessively.
w(
M'Mount
the
AC
outlet
with
two
sets
of
14
hardware.
11
(
~ount
the
two
audio
output
sockets
using
two
sets
of
114
hardware
for each.
Note
the
orientation
of
the
ground
(outside)
lugs
in
the
pictorial.
12(V"'Mount
one
of
the
two
nine
pin
sockets
which
have
mounting
flanges, in
the
center
of
the
chassis.
Note
the
location
of
the
blank
space
between
the
pins
in
the
pictorial.
The
socket
is
mounted
on
top
of
the
chassis
with
two
sets
of
#4
hardware.
13(~Mount
the
multiplex
adapter
cutout
cover
plate
on
top
of
the
chassis
using
four
sets
of
114
hardware.
14 ((.)""install
the
3
rubber
grommets.
The
larger
one
i. '
inserted
in
the
round
hole
at
the
rear
of
the
chassis, .
and
the
other
two
are
fitted
into
the
round
holes
in
/the
dividing
partition
in
the
middle
of
the
chassis.
15( )
Feed
all
the
power
transformer
(PA-509) wires
through
the
one-half
inch
hole
as
shown
in
the
pictorial.
Fasten
the
transformer
in
place
with
four
sets
of
#8
hardware
(the
largest
size).
Mount
the
three
lug
terminal
strip
on
the
power
transformer
mounting
screw
(between
the
hole for
the
trans-
former
leads
and
the
nine
pin
tube
socket)
as
shown
in
the
pictorial,
and
secure
it
with
the
same
lock-
washer
and
nut.
On
completion
of
this
assembly,
recheck
all
hard-
ware
to
make
sure
that
all
components
are
securely
in
place
.
Chassis Wiring
Unless
otherwise
specified,
the
insulation
should
be
stripped
from
each
length
of
wire for a
distance
of
~"
at
each
end
prior
,to
installation.
1(
~trip
a
2.Yz"
piece
of
wire bare.
Feed
one
end
through
the
rear
tab
of
the
tuning
capacitor
Cl
that
projects
through
the
steel
chassis,
and
then
through
the
other
tab,
and
over
to
the
first
tab
that
projects
through
the
PC-
7
board.
See
pictorial.
Solder
all
three
points
and
trim
off
the
excess.
2(0"'Solder
all four
of
the
remaining
connecting
lugs
0'
the
tuning
capacitor
which
project
through
PC-7.
3~Wist
together
the
two
red
and
the
red-yellow
power
transformer
wires.
Connect
one
red
wire
to
pin
#1
of
socket
V9 (8).
Connect
the
other
red
wire
to
pin
#7
of
socket
V9 (8).
Dress
the
red-yellow wire
over
to
the
twisted
mounting
tab
on
the
quadruple
section
electrolytic
capacitor,
and
connect
this
wire
as
shown
in
the
pictorial.
4 (
~onnect
one
end
of
a2)/2"
black
wire
to
lug
#2
of
the
three
lug
terminal
strip.
Connect
the
other
end
to
the
ground
lug
of
the
quadruple
section
electro-
lytic
capacitor
used
in
the
previous
step.
80lder
both
wires.
5
(/Connect
the
green-white
transformer
wire
to
lug
#2
of
the
three
lug
term.inal
strip.
Note
that
the
wire is
inserted
into
the
lower hole
of
the
lug
(8)~
6(
~Connect
the
green
transformer
wire
to
lug
#1
of
the
three
lug
terminal
strip.
This
wire is
inserted
into
}he
lower hole
of
the
lug
(8).
7(
-y(
Twist
together
the
two
black
transformer
wires.
Connect
one
wire
to
lug
1/2
of
the
AC
outlet.
Connect
the
other
wire
to
lug
#2
of
the
fuse
holder
(8).
8(
YConnect
one
end
of
a1)/2" green wire
to
lug
Ifl
of
the
three
lug
terminal
strip.
Connect
the
other
end
to
pin
H4
of
socket
V9 (8).
9(
It"'Connect
one
end
of
a1)/z"
black
wire
to
lug
#2
of
the
three
lug
terminal
strip.
Connect
the
other
end
to
pin
#5
of
socket
V9
(8).
10(
VI
Connect
one
end
of
a500
ohm
5
watt
resistor
to
lug
#1
of
the
quadruple
section
electrolytic
capacitor.
Connect
the
other
end
to
lug
#2
of
the
capacitor.
11
( /
Connect
one
end
of
a2"
red
wire
to
pin
#3
of
socket
V9 (8).
Connect
the
other
end
to
lug
#1
Of
the
quadruple
section
electrolytic
capacitor
(8-).
12(
j
Connect
one
end
of
the
other
500
ohm
5
watt'
resistor
to
lug
#2
of
the
quadruple
section
electrolytic
capaci-
tor
(8).
Connect
the
other
end
to
lug
#3
of
the
capacitor.
13(vf
Connect
one
end
of
a470
ohm
(yell~,
violet,
brown)
one
watt
resistor
to
lug
#3
of
th~
quadruple
section
electrolytic
capacitor.
Connect
the
other
end
to
lug
{l4
of
the
capacitor.
The
following
steps
will
refer
to
eyelet,>
on
the
etched
circuit
boards.
Always
be
certain
that
you
are
connecting
to
the
correct
point.
The
electrical
requirements
of
the
layout
of
the
circuit
board,
combined
with
the
tight
space
allowance,
may
lead
.
to
confusion
unless
the
relationship
of
numerals
and
eyelets
is
carefully
observed.
Refer
to
the
diagrams
of
the
boards.
14(
IJ
Connect
one
end
of
a6"
green
wire
to
lug
#1
of
the
three
lug
terminal
strip.
Feed
this
wire
through
grommet
#1,
and
connect
the
other
end
to
eyelet
#18
on
PC-8
(8).
Remember
that
when
soldering
to
an
eyelet,
a
srpooth
well-soldered
joint
must
be
made
from
the
wire
to
the
eyelet
to
the
copper.
15(
-vIf
Connect
one
end
of
a
2~"
green
wire
to
eyelet
#17
on
PC-8
(8).
Connect
the
other
end
to
eyelet
#14 (8).
16(
J)
Connect
one
end
of
a3)/2" green wire
to
eyelet
#1
on
PC-
7(8).
Connect
the
other
end
to
eyelet
#5
(8).
17(
~Connect
one
end
of
a
7"
green
wire
to
eyelet
116
on
PC-7
(8).
Connect
the
other
end
to
eyelet
#13
of
PC-8
(8).
1M
Connect
one
end
of
a4"
green
wire
to
eyelet
#19
on
PC-8
(8).
Connect
the
other
end
to
eyelet
1124
(8).
19("")
Connect
one
end
of
a4%,"
red
wire
to
lug
ff.3
of
the
quadruple
section
electrolytic
capacitor.
Feed
the
wire
through
grommet
#1
and
connect
the
other
end
to
eyelet
#22
on
PC-8
(8).
20(
0'
Connect
one
end
of
a7)/z" green wire
to
eyelet
#20
on
PC-8
(8).
Feed
the
wire
through
grommet
Ifl
and
connect
the
other
end
to
lug
111
of
the
three
lug
terminal
strip.
21
(..{
Connect
one
end
of
a
6~"
green wire
to
eyelet
#35
on
PC·8
(8).
Feed
the
wire
through
grommet
#2
and
connect
the
other
end
to
lug
.n
of
the
three
lug
terminal
strip.
22(.15
Connect
one
end
of
a5" red wire
to
eyelet
#21
on
PC-8
(8).
Connect
the
other
end
to
eyelet
#16
(8).
23(
'If
Connect
one
end
of
a9"
red
wire
to
eyelet
H15
on
PC-8
(8).
Connect
the
other
end
to
eyelet
#9
on
PC-7
(8).
24
(.1
Connect
one
end
of
a7"
red
wire
to
lug
#3
of
the
quadruple
section
electrolytic
capacitor.
80lder
all
four wires.
Feed
the
wire
through
grommet
HI
and
connect
the
other
end
to
eyelet
1127
on
PC-8
(8).
25(,-1
Connect
one
end
of
a9)/z" red wire
to
lug
114
of
the
quadruple
section
electrolytic
capacitor.
Feed
the
wire
through
grommet
#2
and
connect
the
other
eud
to
eyelet
#34
on
PC-8
(8).
26(
v(
Twist
together
a
10"
black
wire
and
a6!/z"
black
wire,
keeping
one
pair
of
ends
even.
Connect
one
of
the
even
ends
to
lug
#1
of
the
on-off
switch.
Connect
the
adjacent
end
of
the
other
wire
to
lug
112
of
the
on-off
switch.
Feed
the
pair
through
grommet
112.
Connect
the
other
end
of
the
longer
wire
to
lug #2
of
the
AC
outlet
(8).
Connect
the
other
end
of
the
shorter
wire
to
lug
#3
of
the
three
lug
terminal
strip.
27(/)
Connect
one
lead
of
the
.02
mfd
capacitor
to
lug
#1
of
'the
on-off
switch
(8).
Connect
the
other
lead
of
the
capacitor
to
lug
#2
of
the
switch
(8).
Place
the
body
of
the
capacitor
under
the
switch
where
it
is
away
from
the
etched
circuit
board.
Refer
to
the
pictorial.
28( j
Connect
one
end
of
a2"
black
wire
to
iug
#1
of
the
AC
outlet.
Oonnect
the
other
end
to
lug
#1
of
the
fuse
holder
(8).
29( )
Connect
one
end
of
a9J,i" green wire
to
eyelet
!~39
on
PC-8
(8).
Connect
the
other
end
to
the
center
lug
of
output
socket
A.
30(/)'
Connect
one
e;d
of
a1)/2"
green
wire
to
output
socket
A
center
lug
(8).
Connect
the
other
end
to
the
center
lug
of
output
socket
B(8).
Refer
to
the
Appendix
if
one
of
these
sockets
is
to
be
connected
for use
with
an
external
multiplex
adapter.
.31
(fJ
Connect
one
end
of
a5"
red
wire
to
lug
114
of
the
quadruple
section
electrolytic
capacitor.
80lder
all
three
wires.
Connect
the
other
end
to
eyelet
/1-12
of
PC-7
(8).
7
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C»«)B
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~
PA-5~power
transformer
volume
control-
250,000
ohms
fuse-l
ampere
pilot
Iight-#41
PARTS
LIST
FOR
SCHEMATIC
DIAGRAM
R
All
resistors
are
'12
watt
10%
unless
otherwise
noted.
R 1
68
ohms
R
35
68,000
ohms
C
35
.0047
mfd
R 2
10,000
ohms
R
36
500
ohm.
C
36
.0047
mfd
1watt
5%
5watt
w"ewound
C
31
.0047
mfd
10,000
ohms
R
37
500
ohm
C
38
ISO
mmfd
1watt
5%
5watl
wirewound
C
39
ISO
mmfd
R 4
390
ohms
R
38
470
ohm
1watt C
40
.0047
mfd
R S
10,000
ohms
C 1
ganged
tuning L 1
antenna
coil
R 6
47,000
ohms
capaClto~
L 2
3.9/Lh
choke
1watt C 2
ISO
mmf
L 3
mixer
coil
1000
ohms
C 3
180
mmfd
"1
l'
watt C 4
47
mmfd
NPO
L 4 oscillator
COl
1,000
ohms
C 5
.0047
mfd
L 5
heater
choke
1watt C 6
10
mmfd
NPO
L 6
heater
choke
R 9
100,000
ohms
C 1
2.55
mmtd
N2200
L 1
heater
choke
RIO
33
ohms
C 8
ceramic
trimmer L 8
heater
choke
R
11
10,000
ohms
C 9
.0047
mfd
L 9
heater
choke
2watt C
10
.0047
mfd
T 1
I.F.
transformer
R
12
100,000
ohms
C
11
2.2
mmfd
432001
R
13
10,000
ohms
C
12
47
mmfd
T 2
I.F.
transformer
2walt C
13
180
mmfd
432001
R
14
100,000
ohms
C
14
0047
fd
T 3
I.F,
transformer
R
15
330000
ohms
. m
432001
R
16
220'000
ohm
C
15
47
mmfd
NPO
T 4
I.F.
transformer
, s C
16
.0047
mfd
432001
R
17
62,000
ohms
C
17
47
mmfd
NPQ
T 5 Discriminator
R
18
100,000
ohms
C
18
.0047
mfd
transformer
R
19
3.3
megohms
C
19
.0047
mfd
432002
R
20
680,000
ohms
C
20
47
mmfd
NPO
V 1
6AQ8/ECC85
R
21
100,000
ohms
C
21
.01
mfd
V 2
6AT8A
R
22
47,000
ohms
C
22
.0047
mfd
V 3
6BA6
1walt C
23
.0047
mfd
V 4
6BA6
R
23
47,000
ohms
C
24
47
mmfd
NPO
V 5
6AU6/EF94
R
24
3,900
ohms
C
25
47
mmfd
NPO
V 6
6AU6/EF94.
R
25
62,000
ohms
5%
C
26
.01
mfd
V 7
12AX7/ECC83
R
26
62,000
ohms
5%
C
21
.0047
mfd
V 8
6FG6/
EM84
R
27
1.2
megohms
C
28
.0075
mfd
10%
V 9
6V4/
El80
R
28
390
ohms
C
29
.47
mfd
@
100
v.
R
29
8,200
ohms
C
30
27
mmrd
R
30
10,000
ohms
C
31
.22
mfd
@
200
Y.
R
31
100,000
ohms
C
32
40/40/20/20
mfd
R
32
100,000
ohms
@
350
v.
R
33
330,000
ohms
C
33
.02
mfd
R
34
1,000
ohms
C
34
.0047
mfd
6 5
14
13
+
C32 B
R36
+
19
IB
11
3
1.
TEST
POINTS.
See
Alignment
Instructions.
2.
located
on
front
panel
3.
located
on
rear
of
chassis
4.
These
connections
not
made
when
multiplex
adapter
is used.
NOTES:
PA-509
fA
AC
co
32(
v)
Connect
one
end
of
a 1
J.1"
green
wire
to
eyelet
A
of
PC-
7
on
the top
of
the board.
Solder
it
from
the
bottom
of
the
board.
Connect
the
other
end
to
the
top
of
eyelet
A
on
PC-B
and
solder
it
from
the
bottom.
33(......yConnect
the
end
of
the
bare
wire
from
eyelet
#3
on
PC-7
to
lug
1/2
of
the
three
screw
terminal
strip.
34 (0"
Connect
the
wires from
each
side
of
antenna
coil
Ll
to
the
screw
terminal
nearest
it.
Observe
the
wire
arrangement
in
the
pictorial
diagram.
Follow
it
precisely.
Solder
the
wires
to
screw
terminals
#1
and
#3.
Connect
the
twisted
wire from
the
center
of
the
J'ntenna
coil
Ll
to
lug
/1-2
of
the
terminal
strip
(S).
35(
It'
Connect
a
1"
bare
wire
from
eyelet
#23
on
PC-B (S)
to
eyelet
B(S).
This
jumper
should
be
kept
close
to
the
bottom
of
the
board.
front
Panel
Assembly
1
(~ount
the
nine
pin
socket
which
has
a
mounting
flange,
on
the
top
of
the
right
angled
section
on
the
rear
of
the
front
panel. Use
two
sets
of
il4
hardware.
Check
the
pictorial
for
the
proper
position
of
the
blank
area
between
the
pins.
2(
v1
Place
the
:Ki"
lock
washer
on
the
shaft
of
the
volume
control
and
insert
the
control
into
its
hole in
the
front
panel.
Locate
the
lugs
as
shown
in
the
pictorial.
Fasten
loosely
with
a%"
nut.
3(
J
Connect
one
end
of
a2"
black
wire
to
lug
#1
of
the
volume
control
(S).
4(\yConnect
one
end
of
a
2~"
green
wire
to
lug
#2
of
the
volume
control
(8).
5
(~
Connect
one
end
of
a3"
red
wire
to
lug
113
of
the
volume
control
(8).
6(
1/
Twist
together
a9"
black
wire
and
a9" green wire.
Connect
one
end
of
the
black
wire
to
pin
#5
on
socket
VB (S).
Connect
the
adjacent
end
of
the
green
wire
to
pin
#4
on
socket
VB (S).
7
(vr
Connect
one
end
of
a
2,Y:i"
black
wire
to
pin
#3
of
socket
VB (S).
8(
J
Connect
one
end
of
a2" green
wire
to
pin
#]
of
socket
VB (S).
9(
v1
Co.nnect
one
end
of
a3"
red
wire
to
pin
#6
of
socket
V8 (S).
10(
v)
Cut
a2"
red
wire.
Strip
one
end
Y:;".
Feed
the
longer
bared
end
through
pin
#9
of
socket
V8
and
connect
it
to
pin
#7.
Solder
both
pins.
11 (vi
Slide
the
tuning
dial
indicator
disc fully
onto
the
tuning
capacitor
shaft.
The
hub
goes
on
the
shaft
first,
and
its
flat
side
engages
the
flat
section
of
the
~rass
shaft.
12(
)
Feed
the
twisted
black
and
green
wires from
the
socket
on
the
front
panel
through
the
small
slot
in
the
front
of
the
chassis.
Fasten
the
front
panel
to
the
main
chassis
with
three
sets
of
#4
hardware.
13
(J
Twist
together
the
three
wires
from
the
volume
con-
trol.
Connect
the
free
end
of
the
black
wire
to
eyelet
#-37
on
PC-B.
Feed
the
wire
through
the
eyelet
from
the
top
of
the
board,
and
solder
it
from below.
At
eyelet
#37 a
large
amount
of
solder
should
be
flowed
onto
the
board,
and
over
to
the
chassis, to
make
a
good
ground
contact
to
the
chassis.
10
14(~Connect
the
free
end
of
the
green wire
from
the
volume
control
to
eyelet
113B
on
PC-8.
This
wire is
connected
on
top
of
the
board
and
soldered
from
ge
1ow.
15(
/Connect
the
free
end
of
the
red
wire from
the
volume
control
to
the
top
of
eyelet
1136
on
PC-8,
i;
and
solder
it
from below.
Eyelet
#36 is
located
between
the
100,000
ohm
resistor
(brown,
black,
yellow)
and
the
mylar
capacitor
C29.
Position
the
leads
as
shown in
the
pictorial,
and
keep
them
clear
of
the
board.
16v{
Connect
the
free
end
of
the
black
wire from pin
#3
of
socket
VB
to
the
top
of
eyelet
#25
on
PC-8,
and
solder
it
from
below.
17(
~Connect
the
free
end
of
the
green wire
from
pin
III
of
socket
V8
to
the
top
of
eyelet
,¥26
on
PC-B
and
solder
it
from
below.
18(
~
Connect
the
free
end
of
the
red
wire
from
pin
#6
of
socket
V8
to
the
top
of
eyelet
#30
on
PC-8
and
solder
it
from
below.
19(
II'"
Connect
the
free
end
of
the
red
wire
from
pin
#9
of
socket
V8
to
the
top
of
eyelet
1128
and
solder
it
from
below.
Eyelet
#28 is
between
T5
and
the
680,000
•/
ohm
resistor
(blue,
gray,
yellow).
20W)
Mount
the
discriminator
transformer
T5
(432002).
This
transformer
has
five
connecting
lugs
and
two
mounting
tabs.
:It
can
only
be
mounted
in
one
position.
Press
it
firmly
to
the
board
and
solder
the
mounting
tabs
and
the
five
connecting
lugs.
Do
not
use excessive
heat
on
the
five lugs. Avoid using too
much
solder, which
could
flow into
and
damage
the
yansformer.
21
(vr
Thread
the
black
and
green
pair
of
wires
from
socket
VB
through
grommet
.#2
and
connect
the
black
wire
to
lug
#2
of
the
three
lug
terminal
strip.
Solder
all
three
wires
at
the
top
of
the
lug.
Connect
the
green
wire
to
lug
#1
of
the
three
lug
terminal
strip.
Solder
al!)ive
wires
at
the
top
of
the
lug.
22(
~sert
the
end
of
the
line
cord
through
grommet
#3
in
the
rear
of
the
chassis
and
pull
through
about
6
inches.
Tie
a
knot
4
inches
from
the
end,
and
pull
the
line
cord
back
so
that
the
knot
seats
against
the
grommet.
Split
the
two
conductors
of
the
line
cord
down'to
the
knot.
Connect
one
of
the
two
leads
to
lug
#1
of
the
AC
outlet
(S).
Connect
the
other
lead
to
lug
#3
of
the
three
lug
terminal
strip
(S).
The
wiring
of
the
tuner
is now
completed.
It
is
wise
at
this
point
to
go
back
and
check
all
solder
connections
in
the
unit.
One
poor
solder
connection
can
upset
the
performance
of
your
tuner.
Check
to
be
sure
that
the
position
of
the
wires
in
your
tuner
agrees closely
with
the
pictorial
diagram
and
the
photographs.
The
pictorial
diagram
must
necessarily
be
exaggerated
in
some
cases
for
clarity,
but
any
discrepancies
between
it
and
the
photographs
are
of
no
consequence.
All
of
the
leads
should
be
neatly
dressed
along
the
chassis.
Insert
the
tubes
in
their
respective
sockets
as
shown
in
the
pictorial
diagram.
Install
the
tube
shields,
making
certain
that
the
ground
straps
on
the
sockets
slip
between
the
shield
and
the
tube.
The
larger
tube
shields
go
on
the
nine
pin
tubes
and
the
smaller
ones
on
the
seven
pin
tubes.
No
shields
are
used
on
V8
or
V9.
Install
the
dial
light
and
the
fuse.
There
are
two
small
brass-plated
self-tapping
screws which will be used
to
secure
the
brass
front
plate
to
the
front
panel.
To
avoid
scratching
the
brass
plate,
it
is
wise
at
this
point
to
cut
their
threads
in
the
holes
above
and
below
the
tuning
capacitor
shaft
by
inserting
these
screws
and
removing
them.
This
will
enable
much
easier insertion when
the
front
plate
is
installed.
Peel
off
the
protective
plastic
film
on
the
face of
the
brass
front
plate.
Remove
the
%"
nut
holding
the
volume
control
to
the
front panel.
Insert
the
rectangular
plastic
insert
into
the
front
plate
cutout
from
the
rear
(the
top
edge
is
narrower
than
the
bottom).
Place
the
front
plate
against
the
steel
front
panel
so
that
the
plastic
insert
is
held
between
the
two
plates,
and
the
volume
control
shaft
and
the
tuning
capacitor
shaft
protrude
through
both
panels.
Install
the
%/1
nut
on
the
volume control
shaft
and
tighten
it.
Secure
the
front
plate
to
the
panel
with
the
two
brass
self-tapping
screws above
and
below
the
tuning
shaft.
Rotate
the
volume
control
shaft
fully counter-clockwise
and
install
the
small
knob
with
the
pointer
at
the?
o'clock position.
The
knob
is
pushed
onto
the
knurled
shaft.
Fasten
the
large
knob
onto
the
tuning
capacitor
shaft
by
tightening
the
set
screw.
ALIGNING
YOUR DYNATUNER
The
Dynatuner
is
unique
in
its
simplicity
of
alignment.
It
can
be aligned using
the
tuning
eye
as
an
indicating
instrument,
and
this
alignment
is
as
precise
as
can
be
accomplished
with
the
most
complex
laboratory
equipment.
It
is
important
to
emphasize
that
when
this
procedure
has
been
carefully followed,
it
is
not
possible
to
"improve"
on
this
alignment,
and
the
Dynatuner
will
meet
the
most
rigorous
performance
standards.
It
is essential
that
any
serviceman
who
works
on
this
tuner
be
informed
of
this
procedure,
and
that
he is also advised
that
conventional
"sweep"
alignment
techniques
are
not
considered
either
satisfactory
or
desirable.
Certain
parts
of
the
Dynatuner
have
been
preset
close
to
the
proper
alignment
point.
All
of
the
LF.
transformers,
the
discriminator
transformer,
and
the
slug-tuned
coils
on
the
RF.
board
PC-?
are
preset.
Several
approximate
adjustments
should be
made
first, which will
permit
reception
of
local
stations,
and
then
complete
alignment
can
b/rried
out.
l6/l
The
osciJlator
trimmer
capacitor
C8
screw (accessible
from below
the
chassis)
should
be
turned
until
the
head
of
the
screw is 5/16/1 from
the
triangular
nut.
On
the
top
of
tuning
capacitor
Cl
there
are
two
adjustment
screws
(trimmer
capacitors)
accessible
through
the
two
holes in
the
top
of
the
tuning
capaci-
tor
shield.
The
center
screw
(Cl-D)
adjusts
the
mixer,
and
the
rear
screw
(Cl-B)
adjusts
the
RF.
stage.
The approximate settings given
in
steps
#2
and
#3
below have already been made
as
the
capacitor
is
supplied
to
you.
2(0
Turn
in
the
screw
CloD
on
the
center
(mixer)
.I-
section
until
it
is in all
the
way.
It
should
be snug,
~
but
do
not
force it.
Then
back
it
off
),i
turn
counter-
clockwise.
30urn
in
the
screw
Cl-B
on
the
rear
(RF.)
section
until
it
is in fully,
but
do
not
force it.
Then
back
it
off %
turn
counter-clockwise.
Now
you
shou, --make
one
final inspection
of
the
unit
to
see tall connections
are
soldered,
that
,here
are
0loose wire clippings
or
pieces
of
solder,
nd t
there
are
no
parts
hanging
in
the
air. Also
ch
to
make
certain
that
there
are
no bridges
of
del' across
the
insulated
areas
of the
circuit
boards,
If
everything
appears
to conform
to
the
pictorial
diagrams
and
photographs, plug
the
Dynatuner
in
(to AC
current
sources
only)
and
turn
it
on.
With
an
antenna
attached,
and
an
audio
connect-
ing cable between
the
tuner
and
an
amplifier
or
preamplifier as described in
the
section
"Using
Your
Dynatuner",
you
should
turn
the
volume
control
knob
on
the
tuner
fully counter-clockwise
and
then
turn
on
the
on-off switch.
The
dial
light
should
light,
and
there
should be a
slight
glow visible in
each
tube
as
its
heater
lights,
and
then
the
tuning
eye
should
glow. All
of
this
will
take
only
about
15 seconds.
When
turmng
the
tuning
knob,
some
deflection
of
the
tuning
eye
should
be
apparent
as
the
tuning
passes
through
the
frequencies
of
local
stations.
By
turning
the
volume
control
knob
clock-
wise,
it
should
be
possible
to
hear
some
hiss
between
stations
and
sound
from
the
stronger
stations.
If
aU
these
effects
cannot
be
obtained,
refer
to
the
section
"In
Case
of
Difficulty"
before
attempting
to
use
the
tuner
further
or
to
align it.
As
soon
as
it
is
evident
that
there
is reception
of
some
stations,
we
suggest
that
you
leave
the
tuner
operating
for
about
an
hour
to
let
the
tubes
age
and
for
operating
conditions
tQ
stabilize.
This
will elimi-
nate
the
need for
re-alignment
after
alignment
is
carried
out.
You
should
be
able
to
enjoy
the
use
of
the
tuner
during
this
time
since
normally
reception
wiJl
be
quite
adequate
on
local
stations.
The
alignment
tools
to
be used are: a
plastic
tool
(supplied) which
has
ahexagonal
end
for
adjustment
of
the
tuning
slugs
in
the
I.F.
and
discriminator
transformers,
and
asmall
tipped
screwdriver
with
an
insulated
handle. Only
the
plastic
tool
should
be
used
to
adjust
the
transformers.
Any
other
type
of
instrument
win
damage
the
tuning
slugs.
When
using
the
plastic
alignment
t90l, all
adjustments
are
made
using
the
end
which h'as a
shoulder
to
prevent
inserting
the
tool
too
far.
BE
CAREFUL
IN
HANDLING
THE
CHASSIS
DURING
ALIGNMENT.
THERE
IS
SOME
SHOCK
HAZARD
DUE
TO
THE
EXPOSED
WIRING.
11
It
is
suggested
that
before proceeding,
you
read
these
instructions
over
completely,
to
familiarize
yourself
with
the
general
procedure.
The
tuner
is
to
be
connected
to
an
amplifier
and
speaker,
turned
on,
and
the
antenna
attached
as for
normal
use.
I.F.
Alignment
When
making
these
adjustments,
turn
the
slug
back
and
forth
over
a
narrow
range.
Do
it
slowly
and
carefully
to
obtain
the
correct
point
with
precision.
If
everything
is
normal,
it
is
not
necessary
to
make
more
than
a
small
adjustment
to
reach
the
right
point.
I F
YOU
HA
VE
TO
TURN
PAST
ONE
FULL
TURN
YOU
ARE
PROBABLY
COM-
PENSATING
FOR
SOME
FAULT
IN
WIRING
OR
COMPONENTS,
AND
YOU
SHOULD
STOP
TO
RECHECK
BEFORE
PROCEEDING.
DO
NOT
APPLY
EXCESSIVE
FORCE
WHEN
TURNING
THE
SLUGS.
4
C....("
Set
the
tuning
knob
to
a
point
where
no
station
can
be
heard
(only
hiss).
Insert
the
plastic
alignment
tool
into
the
top
of
LF.
transformer
T4,
and
adjust
for
the
point
of
loudest
hiss.
If
you
find
it
difficult
to
locate
the
peak,
turning
on
a
nearby
vaCUUm
cleaner
or
electric
shaver
may
simplify
the
task.
The
sharpness
of
the
point
of
correct
tuning
will
increase
as
you
proceed.
The
hiss will
get
louder,
and
you
can
control
it
for a
comfortable
level
with
the
volume
control.
As
the
adjustment
proceeds,
some
indication
will
become
visible in
the
tuning
eye,
and
you
will
note
that
the
eye
closes
to
some
extent
as
the
hiss increases.
When
this
effect is
noted,
you
should
make
all
further
adjustments
using
the
maximum
closing
of
the
eye
to
tell
you
what
is
the
proper
alignment
point.
Always
use
the
shoulder
end
of
the
alignment
tool
for
this
work.
The
following 7
steps
all
refer
to
the
adjustment
procedure
described
here.
5(
V"Adjust
the
bottom
slug
of
T4.
6(.;{
Adjust
the
top
slug
of
T3.
7
(J'
Adjust
the
bottom
slug
of
T3.
8(0
Adjust
the
top
slug
of
T2.
9(
Jdjust
the
bottom
slug
of
T2.
10
(vt
fdjust
the
top
slug
of
Tl.
11
(vf
Adjust
the
bottom
slug
of
Tl.
Discriminator
Alignment
The
alignment
of
the
discriminator
controls
the
distortion
of
the
entire
tuner.
The
Dynatuner
has
a
positive
adjustment
technique
for
this
critical
part
of
the
alignment.
12( )
Tune
a
strong
signal
(station)
very carefully
to
get
the
precise
point
of
maximum
eye
closing.
Make
sure
that
you
do not disturb the setting
of
the
tunin.g knob
during
the
following
adjustments,
as
it
is
important
for
the
tuner
to
be
accurately
tuned.
The
eye
will
no
longer
indicate
the
exact
tuning
point,
as
it
will
be
serving
other
functions.
12
13( )
Unscrew
(counter-clockwise)
the
top
slug
of
the
discriminator
transformer
T5,
using
the
shoulder
end
of
the
plastic
alignment
tool.
Unscrew
this
until
the
top
of
the
slug
is flush
with
the
top
of
the
transformer.
This
procedure
has
detuned
the
secondary
winding
of
the
discriminator
transformer-a
step
which is
essential
in
order
to
obtain
the
optimum
adjustment
of
its
primary
winding
which
is
the
next
step.
At
this
point
the
tuning
eye
must
be
connected
to
another
part
of
the
circuit
in
order
to
measure
the
correct
tuning
point
of
the
discriminator
primary
(as
set
by
the
bottom
slug).
If
you
are care!ul,
it
is
possible
to
unsolder,
and
resolder
the
required
wires
in
this
step
and
several
succeeding
steps
without
turning
off
the
tuner.
However,
YOU
MUST
BE
CONSCIOUS
OF
THE
POSSIBLE
SHOCK
HAZARD
FROM
THE
EXPOSED
WIRING.
If
you
wish
to
avoid
all
risk
of
shock,
you
can
turn
the
tuner
off,
make
the
connections,
and
turn
it
on
again.
However,
it
is essential
that
you
give
the
set
afew
minutes
to
warm
up
thoroughly
after
any
time
that
you
turn
it
off,
even
if
the
off-time
is
only
a
minute
or
less.
Ie
11
VTVM
is
ll
....
uiluble,
discl'iminntor
nlignlllent
tUIl
be
simHlitled
hy
following
the
in~ll'uctiol'ls
~i\!en
in
smull
type.
in
place
of
:sleps
}·1
throu,:rh
23.
The
VTVM
should
be
of
a
type
which
hu~
at
least
n 1
me,whm
resistor
in
the
DC
pr'obc
to
isolate
the
probe
antl
lead
capacit.y
from
the
meuRured
circuit.
Connect
the
VTVM
between
eyelet
#32
Hl1d
the
ch1ts~is,
and
.Hljl.l:;t
the
buttom
slu~
of
T5
f01"
maximulll
ne).!nli
....
e\'oltagoe
(about
-~
volts
L
Now
connect
the
VTVM
to
eyelet
#31.
Tnrn
the
tOI)
sin",
of
T5
in
9
full
t.urns
as
n
first
appruximation.
Now
adjust.. thh:i tiIul<:"
:so
lh<lt
an
accurate
z.ero
reading
is
obtnined.
It
is
~sential
that
yOU
KO
throu,sch
zero
til'st.
then
locate
it
precisely.
Use
the
m~ximum
sensit,vity
sc.·ale
on
the
meter.
14(
~
Unsolder
and
lift
off
the
jumper
wire
which
con-
.
7cts
from
eyelet
#23
on
PC-8
to
eyelet
B.
15(-1'
Temporarily
solder
awire
from
eyelet
#23
to
eyelet
#32
on
PC-8.
l6(
...("
Adjust
the
bottom
slug
of
T5
for
maximum
closing
of
the
eye.
17(~
Unsolder
the
end
of
the
temporary
wire
from
eyelet
#32
and
temporarily
connect
it
to
eyelet
113I.
l8(.I)
Solder
a2"
piec~
of
bare
wire
to
the
center
ground
yin
of
socket
V7.
19(
0'
Turn
the
top
slu!g
of
T5
in
(clockwise) 9full
turns,
which
brings
it
close
to
the
proper
adjustment
point.
20(~Touch
the
free
end
of
the
wire from
the
center
ground
pin
of
V7
to
eyelet
#31.
You
will
observe
that
there
is adeflection
of
the
eye
(either
inward
or
outward).
Rotate
the
top
slug
of
the
discriminator
transformer
T5
back
and
forth
slowly while alter-
nately touching
and
releasing
the
free
end
of
the
wire
from
the
center
ground
pin
of
V7
to
eyelet
1131.
The
actual
adjustment
of
the
slug
must
be
made
while
-------the
wire is not
touching
the
eyelet.
Check
the
eye's
deflection after
each
change.
You
are
seeking
the
precise
point
where
there
is no shift
in
the eye
as
the
wire
is
touched
to,
and
removed
from,
eyelet
#3I.
There
may
be
slight
changes
in
the
brightness
of
the
eye
as
this
is done,
but
these
are
of
no
consequence.
Turn
the
slug
in
the
direction
which
minimizes
the
shift
in deflection
until
there
is
no
shift
when
the
wire
makes
or
breaks
contact
with
eyelet
/131.
21
(\Y
Remove
the
temporary
wire
between
eyelets
#23
and
#31.
22(
III
Re-coJU1ect
the
jumper
wire
from
eyelet
#23 to
eyelet
B.
Keep
it
reasonably
close to
the
board.
23(
Remove
the
wire from
the
center
ground
pm
of
socket
V7.
24( )
Cut
apiece
of
wire exactly
15/16"
in
length.
Strip
exactly
X"
of
insulation
from
one
end.
The
other
end
need
not
be
stripped.
Insert
the
stripped
end
fully
into
the
bottom
of
eyelet
#29 (S).
This
wire
should
stand
up
straight
from
the
PC-8
board
with
the
other
end
free,
to
a
height
of
11
/16".
Dress
adjacent
wires
away
to
permit
this
wire
to
stand
straight
without
touching
any
others.
This
wire
may
seem
to
be
unusual,
as
it
is
con-
nected
at
one
end
only. However,
it
is
what
is
known
in
electronic
parlance
as
a
"gimmick"
and
it
is
actually
a
small
capacitor
which
corrects
for
the
effects of
interaction
between
the
adjustments
of
the
two
slugs
in
the discriminator
transformer.
At
such
time
as
realignment
is
performed,
this
"gimmick"
should
be
removed
before
aligning
the
discriminator.
Alignment
01
the
Front
End
The
oscillator
must
now be
adjusted.
In
this sec-
tion, dial
tracking
will be simplified if
another
FM
radio
is
available
to
enable
you
to
identify
stations
readily.
25(.,;(
Place
the
bottom
plate
on
the
tuner.
See
that
the
side
holes
are
aligned
with
the
chassis
holes, for
/on'ect
orientation.
26(0
Turn
the
tuning
knob
until
you
have
located
an
FM
station
of
known
frequency
at
the
high
end
of
the
band
(close
to
108 megacycles),
the
higher
the
better.
27( )
Adjust
the
oscillator
trimmer
capacitor
C8
through
the
hole in
the
bottom
plate,
using
a
small
screw-
driver.
At
the
same
time
readjust
the
tuning
knob
until
the
station's
frequency
is
indicated
in
the
plastic
window
by
the
tuning
dial.
In
other
words,
you
set
the
dial
to
show
the
correct
frequency
and
adjust
the
trimmer
capacitor
until
the
eye
closes
to
a
maxImum.
28(
)
Now
find a
station
of
known
frequency
at
the
lowest
end
of
the
dial
(close
to
88 megacycles). Using a
small
screwdriver,
and
touching
only
the
insulated
handle.
adjust
the
brass
slug
in
the
oscillator
coil
L4
while
setting
the
tuning
dial
to
the
station's
broad-
cast
frequency.
This
is
the
same
type
of
adjustment
as
was
made
in
the
preceding
step.
It
may
be
necessary
to
repeat
the
adjustments
at
the
two
extremes
of
the
dial
several
times
in
order
to
have
the
tuner
"track"
properly.
If
the
adjustments
are
not
made
accurat=ly,
the
dial
readings
will
not
coincide
with
station
frequencies
across
the
dial.
29i
)
Tune
accurately
to
a
station
near
108
megacycles
and
adjust
the
two
trimmer
capacitors
C1-B
and
C
l-D
on
the
top
of
the
tuning
capacitor.
The
screw-
driver
should
not
touch
the
capacitor
shield
when
making
these
adjustments.
The
adjustment
should
be
made
for
maximum
eye
closing.
If
the
eye
is
closed
to
its
normal
maximum,
the
effects
of
these
adjustments
will
not
be
readily
apparent,
so
it
is
essential
that
aweak signal be used
here
(where
the
eye
is
about
II,"
open)
or
proper
alignment
will
not
be
realized.
To
obtain
asufficiently
weak
signal,
it
may
be
necessary
to
remove
the
antenna
and
substitute
a
short
piece
of
wire.
Shorting
out
half
the
antenna
is
another
alternative.
With
signals
of
this
magnitude
(a
very
few
microvolts)
it
will be
noticed
that
the
eye
is
sensitive
to
flutter
as
a!"esult
of
airplanes
passing
overhead,
or
varying
signal
strength
as
a
result
of
atmospheric
conditions.
Care
must
be
taken
not
to
allow
this
sensitivity
to
influence
the
actual
adjustment
of
C1-B
and
CloD.
30(
)
Tune
carefully
to
a
station
near
88
megacycles
and
adjust
the
two
brass
slugs in
the
mixer
coil
L3
and
the
R.F.
coil
L1
for
maximum
eye
closing.
The
last
two
adjustments
should
be
repeated,
since
there
is
interaction
between
adjustment
of
the
trimmer
capacitOl's
and
the
slugs of
the
coils.
This
adjustment
of
L1
and
L3
is
not
critical,
and
may
be
a
broad
peak,
necessitating
an
approximate
center
setting.
_.
\ \
(-1"""'"
\.-.~e;J
This
completes
the
alignment
of
your
Dynatuner.
No
further
alignment
should
be
required
unless
there
is
a
change
in
tubes
or
components.
At
that
time,
you
have
the
means
of
re-aligning
it
so
that
your
Dynatuner
will
always
be
at
the
very
peak
of
its
performance
capability.
However,
one
word
of
caution
is
in
order-do
not
make
these
adjustments
unnecessarily,
as
the
various
slugs will
eventually
loosen
and
cause
tuning
shifts
to
the
detriment
of
performance.
Alignment
adjustments
should
be con-
sidered
as a
semi-permanent
type
of
adjustment,
and
not
an
operational
adjustment.
After
completion
of
alignment,
install
the
rubber
feet in
the
corner
holes
of
the
bottom
plate,
and
secure
the
bottom
plate
and
the
cover
with
the
four
sheet
metal
screws.
The
flange on
the
front
of
the
cover
goes
between
the
steel
front
panel
and
the
brass
front
plate.
Your
Dynatuner
is
now
ready
for
long
pleasureable
use.
IN
CASE
OF DIFFICULTY
In
the
event
that
your
first
attempt
at
listening
to
your
Dynatuner
is unsuccessful, a
systematic
approach
to
locat-
ing
the
difficulty will
save
you
much
time
and
trouble.
Because
90%
of
the
difficulties which
are
encountered
can
be
attributed
to
either
incorrect
wiring
or
a
poor
solder
connection,
it
is
strongly
recommended
that
you
first
ask
someone
else
to
check
the
wiring
against
the
pictorial
diagrams.
as
frequently
one
person
will
make
the
same
error
twice.
Drift,
or
shifting
of
the
tuned
signal
frequency,
should
be
cause
to
suspect
poor
mounting
or
soldering
of
C7
or
C8,
or
adefective
6AT8A
tube.
If
the
dial
light
and
tubes
do
not
light
when
the
set
is
plugged
in
and
turned
on,
check
to
see
if
the
fuse is
all
right. A
continuity
test
at
the
prongs
of
the
line
cord
with
a
meter
will
show
if
the
fuse, on-off switch,
and
power
transformer
primary
winding
are
all
properly
connected
into
the
circuit.
13
If
the
one
ampere
fuse blows
when
the
set
is
turned
on,
remove
all
the
tubes,
install
another
one
ampere
fuse
and
try
again.
If
a
replacement
fuse
of
the
same
size
blows
when
aJI
of
the
tubes
Rre
removed,
the
trouble
is
either
in
the
wiring
to
the
transformer's
black
leads,
or
in
the
transformer
itself.
If
the
tubes
light,
but
not
the
dial
light,
the
light
may
be
defective,
or
the
wires
which
lead
to
it
via
the
etched
circuit
board
may
be
open.
If
tubes
light
and
the
eye
tube
shows
a
lighted
filament,
but
the
eye
does
not
have
a
blue-green
glow
on
the
front
screen
(which
is
visible
through
the
plastic
insert
in
the
front
panel)
check
the
wiring
around
the
tuning
eye
socket.
If
this
is
all
right,
the
fault
may
be
in
the
power
supply,
and
the
rectifier
tube
V9
and
the
associated
wiring
should
be
checked.
If
the
eye
glows,
the
power
supply
wiring
can
be
asswned
to
be
correct.
If
the
eye
deRects
as
the
tuning
dial
is
turned,
this
is
an
indication
that
the
R.F.
stages
and
the
I.F.
stages
are
working.
If
no
sound
is
heard,
but
the
eye
deflects,
the
difficulty lies in
either
V7
(12AX7)
or
the
components
associated
with
it,
induding
the
volume
control.
If
V7 is
functioning
properly,
touching
either
pin
!!2
or
pin
P7
of
the
socket
with
the
point
of
a
screwdriver
should
produce
a
pop
or
hum
through
the
hi
fi
system.
If
it
does
not,
touch
the
audio
output
cable
ends
when
they
are
removed
from
the
tuner
sockets.
This
will
check
the
cable
and
the
follow-
ing
equipment.
If
they
are
working,
hum
will
be
heard
when
the
ca ble
end
is
touched.
If
the
tuning
eye
does
not
deflect
when
the
tuning
knob
is
turned,
the
difficulty
is
probably
on
PC-7.
Tube
V2
should
be
checked.
If
a
very
faint
hiss
can
be
heard,
it
is
possible
that
slight
readjustment
of
the
screws
on
top
of
the
tuning
capacitor
will
bring
up
the
signal level so
that
indications
are
nonnal
and
the
alignment
procedure
can
be
begun.
Frequently
difficulties
in
the
I.F.
strip
(PC-8)
can
be
localized
by
touching
the
,11
pin
of
each
I.F.
tube
in
the
sequence
V6, V5, V4, V3. Anoise
or
thud
should
be
heard
each
time
the
ill
pin
is
touched,
and
the
tuning
eye
should
deflect.
If
you
find aifl
pin
which
does
not
produce
anoise,
then
look
for
the
difficulty
between
that
point
and
the
previously
tested
#1
pin.
If
the
tuner
operates
and
can
be
aligned,
but
has
hum
in
the
signal,
there
are
several
tests
to
be
made.
If
there
is
hum
even
when
the
volume
control
is
turned
down,
unplug
the
tuner
from
the
associated
equipment
and
see
if
the
hum
disappears.
If
it
does
not,
the
fault
lies
in
the
associated
equ.ipment.
If
it
does
disappear,
then
the
hum
is
most
likely
to
be
associated
with
V7.
The
circuit
should
be
inspected
and
the
12AX7
checked,
preferably
by
sub-
stitution.
If
the
hum
is
part
of
the
signal
and
disappears
when
the
volume
is
turned
down,
try
several
stations,
as
it
is possible
that
the
one
used
as
a
test
signal
is
broad-
casting
some
hum.
If
hum
occurs
on
all
stations,
the
BAT8A
may
be
faulty
and
should
be
checked
(preferably
by
substitution).
If
there
is
apparent
distortion
in
the
signal,
make
sure
that
this
is
not
a
momentary
effect
because
of
poor
trans-
mission.
If
it
persists,
compare
the
same
system
with
phonograph
or
tape
as
a
different
program
source
to
see
if
the
effect
can
be
localized
to
the
tuner.
If
it
is
definitely
in
the
tuner,
it
may
be
caused
by
improper
discriminator
14
alignment,
and
this
portion
of
the
alignment
procedure
should
be
repeated.
In
the
course
of
trouble
shooting,
in
sped
very
carefully
for
"bridges"
of
solder
from
one
point
to
another.
Also
A.
recheck
for
correctness
of
component
positions
on
t.he
,,}J
printed
circuit
boards.
Many
defects
of
this
type,
as
well
as
-
faulty
components
can
be
ascertained
by
voltage
measure-
ments,
and
a
complete
voltage
chHrt is
provided.
Any
deviation
of
20(,;.
or
more
from
this
chart.
is
evidence
of
possible defects.
Examination
of
components
in
the
area
of
incorrect
voltage
(with
reference
to
the
schematic
diagram)
should
help
to
uncover
tlH~
difficult.y.
Normal
radio
servicing
techniques
of
signal
injection
and
signal
tracing
are
appropriate
for localizing
troubles,
but
for
best
alignment,
the
procedure
specified in
these
instructions
should
be
followed.
However,
if
servicing
is
done
by
a
qualified
technician,
he
can
expedite
alignment
by
setting
the
1.1<'.
transformers
for
peak
eye
defledion
using
a
very
low
kVf'1
10.7 Inc signal. The'
strength
of
this
signal
should
be sufficipnt to
actuate
the
PYC\
but
not
to
close
it
t.O
its
normal
maximum.
Discriminator
alignment
must
foflow
the
technique
dpscribed
in tht'sl'
instructions.
Conwntional
SWf'ep
techniquf's
should
not
be used.
APPENDIX
Your
Dynatuner
as
an
FM
Receiver
An
acc('SSory 10
watt
amplifi/'r,
the
FMA-2,
is
available
to fit
the
multjplex
adapter
space
on
your
Dynaturwr
to
convert
it
to a
complete
FM
receiver,
requiring
only
a
loudspeaker.
The
volume
control
on
the
tuner
is used,
and
power is
drawn
from
the
tuner
power
supply.
Operation
as
a
component
tuner
is
not
affected. FurthC'r
information
can
be
obtained
from
Dynaco,
Inc.
f)
Multiplex
Provisions
Your
Dynatuner
is
fully
prepared
for
multiplf'xed
stereo
reception.
The
FMX·3
Dynakit
Multipll'x
Intf'grator
can
be
installed
in
thl'
chassis
cutout
pl"Ovided,
and
tht,
power
supply
has
heen
desi~ned
with
adequate
res(~rve
for
the
adapter's
requiremf'nts.
Most
important,
however, is th('
tuner's
design
for
adequate
handwidth
to
handle
full fidelity
multiplex
reception,
necessitating
Rat
resp0I1SP
well
heyond
t.he
audio
range.
The
FMX-3
Integmtor
will
include
all
necessary
inter-
connection
instructions.
The
A
and
B
output
sockets
will
then
provide
the two
stereophonic
ch;:mncls,
or
the
mono·
phonic
signal
when
a
station
is
not
hroadcasting
steJ'(~o.
The
B
output
socket
can
be
connected
to
provide
a
.75
volt
isolated
signal
from
the
low
impedance
cathode
follower
output
of
the
discriminator
without
de-emphasis
for
use
with
external
multiplex
adapters.
For
this
arrange-
ment,
remove
the
wire
between
the
center
lugs
of
output
sockets
A
and
B,
and
connect
a
wire
from
eyelet
#33
of
PC-8
to
the
center
lug
of
output
socket
B.
If
the
external
adapter
contains
an
input
blocking
capacitor
(.001
mfd
or
greater)
no
other
connections
are
required.
If
the
adapter
does
not
have
a
blocking
capacitor
in
series
with
the
input,
it
is
generally
simplest
to
install
it
in
the
adapter.
Alternatively,
a.001
mfd
capacitor
can
be
installed
in
series
with
the
B
output
lead,
using
a
one
lug
terminal
strip
which
may
be
bolted
to
the
chassis
with
the
cover
plate
harclware.
Indoor
folded
Dipole
Antenna
FACTORY SERVICE
AND
GUARANTEE
Measure
and
cut
a
58
L~"
length
from
the
10 feet
of
"0012
twin-lead
supplied
with
this
kit.
'.
Strip
the
insulation
from
both
wires
back
1./'
at
each
end.
-
The
Dynatuncr
FM-l
is
designed
to
providc
good
service
over
a
long
period
to
time.
It
is
intended
to
be
used
at
the
conventional
117
volt
AC
line
input
found
in
most
homes.
Operation
up
to
125
volts
will
not
cause
any
problem.
Above
that
voltage,
it.
is
suggested
that
a
voltage
regulating
or
adjusting'
device
be uscd in
order
to
protect
thf!
compo-
nents
in
your
tuner.
The
normal
guarantee
011
the
equip-
ment
is
not
applicable
if
it
is
used
above
the
125
volt
rating.
In
the
event
that
the
assembled
tuner
docs
not.
function
properly
or
breaks
down
aftcr
some
usc,
Dyna
Company
will
service
the
tuner
for afixed
service
fee
plus
the
('o~t
of
parts
which
have
been
damaged
by
the
user
or
are
pust
the
guarantee
period.
The
service
fee is
$10.00
and
inrludes
neceS.'lary relJairs,
checkout,
and
alignment.
If
only
check-
out
and
alignment
arc
required,
the
service
fee is
$5.00
.
This
service
facility
is
not
available
for
kits
which
are
incompletely
wired,
or
have
been
wired
with
other
than
rosin
core
solder.
or
in
which
changes
or
modificat.ions
have
been
made
without
factory
authorization.
In
addition,
NO
PArnS
WILL
BE
REPLACED
NOR
WILL
ANY
SEHVICE
BE
AVAILABLE
FOn.
KITS
WHEHl<;
THE
GUARANTEE
POST
CARD
HAS
NOT
BEEN
RETURNED.
THE
SERIAL
NUMBER
ON
THIS
INSTRUCTION
BOOK
MUST
BE
MENTIONED
IN
CORRESPONDENCE,
PAHTS
HETURN,
OI{
KITS
RETURNED
FOR
FACTORY
SERVICE.
It
is
the
factory
prerogativp
to
limit
til('
service
facility
to
one
year
from
date
of
purchase.
There
is
no
charge
for
service
of
factory
wired
tuners
during'
the
first.
year.
but
th(~
unit
must
be
shipped
prepaid
and
will hc
returned
freight
collect.
All
parts
in
the
FM-1
arc
gUilranteed for a
period
of
one
year
from
lJurchase
except
tubes
which
carry
the
standard
EIA
guarantee
of
90
days.
Parts
which
are
defcctive
will
be
replaced
at
no
charge
if
they
are
returned
prepaid
to
the
factory
either
directly
or
via
the
dCHler
from
whom
the
kit
is
purchased.
Many
Dynaco
dealers
carry
span!
parts
in !'!tock
to
facilitate
replacements.
After
the
guarantee
period
is
past,
Dynaco
will
supply
any
non-standard
parts
used
at
net
prices.
Parts
which
arc
standard
dealer
items
can
be
purchased
from
most
elect.ronic
supply
stores.
Shipment
should
be
made
by
prepaid
Railway
Express,
where
possible.
Returns
will
be
made
COD
for
freight
and
repair
costs
unless
these
have
been
prepaid.
If
the
PA-509
transformer
is
returned
for
factory
repair
or
exchange,
it
should
be
rcmoved
from
the
tuner
without
cutting
the
leads
short.
If
leads
have
been
cut
rather
than
unsoldered,
so
that
they
are
no
longer
usabll;.
the
guarantee
on
the
transformer
is
voided.
Dyna
Company
assumes
no
responsibility
or
liability
for
damages
or
injuries
sustained
in
assembly
or
operation
of
the
Dynatuner.
When
shipping
the
tuner
for service, a
note
must
be
attached
specifying
the
symptoms,
the
name
and
address
of
the
sender,
and
the
serial
number
of
the
unit.
It
should
be
securely
packed
with
stuffing
inside
the
cover
to
prevent
the
tubes
from
falling
out
of
the
sockets.
It
should
be
placed
in
a
rugged
carton
surrounded
by
several
inches
of
shredded
paper
or
other
soft
packing
material.
The
original
kit
carton
is
not
suitable
for
shipping
a
wired
tuner.
Twist
the
exposed
wire
ends
together
and
solder.
Slit
the
center
webbing
down
the
middle
for
one
inch
on
one
end,
and
strip
off
1/'
of
insulation
from
both
ends
of
the
remaining
piece
of
t.win-lead.
Fold
the
wire
to
find
the
middle,
and
make
a
"1'''
cut.
cutting
through
the
bottom
wire
as
shown.
Strip
the
insulation
from
the
wire
ends,
exposing
}~,.
of
bare
wire
at
both
sides
of
the
cut.
The
extreme
sensitivity
and
quieting
ability
of
the
Dynatuner
will
enable
you
to
receive
most
signals
using
this
folded
dipole.
The
antenna
section
should
be
supported
in
a
horizontal
position
in
a
straight
line,
and
can
be
taped
or
tacked
to
a
convenient
surface
or
placed
beneath
the
rug.
The
antenna
should
be
kept
away
from
any
metal
which
might
tend
to
absorb
the
signal.
A
simple
folded
dipole
of
this
type
has
its
maximum
taiesponse
at
right
angles
to
the
antenna
wire.
Therefore,
l_est
reception
from
a
given
direction
will
be
achieved
by
rotating
the
antenna
so
that
it
points
90°
from
the
desired
direction
of
reception.
Connect
f':'l,ch
of
the
wires from
one
end
of
the
lead-in
.• wire
to
the
c('nter
of
thl'
antenna
wirp.
Twist
togdher
and
'.solder.
The
f'nd
marked
"A"
is
connected
to
the
two
outer
antenna
screws
I
marked
3000
on
the
bottom
plate)
of
your
Dynatuner.
Do
not
connl'ct
this
type
of
antenna
to th('
center
screw.
15
PARTS LIST
The
parts
listed
here
are
in
addition
to
the
parts
lists
included
with
the
pictorial
diagrams
of
PC-7
and
PC-8.
Acomplete
inventory
will
include
all
three
sections.
I
Chassis
set
(muin-(".oflftssis,
ft"Dl1't'l'n'nl!')
,
bO~1ii
plnle,
cover,
ll~~T
~Id,
and
rnllltipJ.e.lLudaDt~[
~[lyer
plate)
/'
Power
transformer-PA-509
W'"
Tuning
capacitor,
ganged-CI-A,
-B,
-C,
-D,
-E
Slide switch, on-off,
SPST
AC
outlet
.t
Fuse
holder
with
rubber
washer
and
nut
Fuse,
1
amp
3
screw
terminal
strip
*3
lug
terminal
strip
pilot
lamp
#47
11'
Line
cord
.1""
Volume
control,
250,000 n
a---
output
sockets
Audio
cable
shielded
Q'
9
pin
tube
sockets
with
flanges-V8
and
V9
~
pieces
hook-up
w,re
(red-black-green)
piece
twin-lead
wire for
antenna
V
quadruple
section
electrolytic
capacitor-C32
(40/40/20/20
@
350
~olts)
1.02 disc
capaojtor-C33
~
500
ohm
5
watt
resistors-R36
and
R37
I470
ohm
(yellow, violet,
brown)
1
watt
resistor-R38
I
Instruction
Manual
v
Guarantee
Card
HARDWARE
~
#6 X
yt"
sheet
metal
screws
#4/40 x
5/32"
self-tapping
screws
-4'"'
#8/32 x%"
machine
screws
.... #8
lockwashers
<I(
#8/32
nuts
~
%"
lockwasher
~
%"
nut
...:;;r
#4/40 x!1"
machine
screws
~
#4/40
nuts
~
#4
lockwashers
A#6/32
nuts
k#6
lockwashers
.~
TUBES
~
6AQ8/ECC85-VI
~
6AT8A-V2
~
6BA6-V3
and
V4
M-"
6AU6/EF94-V5
and
V6
J--
I2AX
7
/ECC83-
V7
~
6FG6/EM84-V8
~
6V4/EZ80-V9
.....
tube
shields for 7
pin
sockets
;Y
tube
shields
for
9
pin
sockets
iY
rubber
grommets
of
rubber
feet
If"
large
knob
,...
small
knob
11-"
plastic
alignment
tool
~
tuning
indicator
dial
disc
l.Y
plastic
insert
for
front
plate
~
brass
front
plate
Part>
of
similar
type
which
do
not.
change
performance
may
sometimes
be
included
as
a
matter
of
expediency.
This
will
account
for
slight
variations
in
value
and
appearance.
VOLTAGE
CHECK
POINTS
All
voltages
are
measured
with
the
volume
control
at
minimum
and
the
dial
tuned
between
stations
(no
signal)
sin
many
of
the
voltages
will
vary
widely
under
different
signal
conditions.
All
voltages
are
measured
between
th
point
indicated
and
the
chassis,
using
a
vacuum
tube
voltmeter.
PINfl
TUBE
123 4 5 6 78 9
VI
6AQ8/ECC85
145
DC
0.8
DC
6.3 AC 0145
DC
0.8 DC 0
V2
6AT8A
-3
DC'*
52 DC 2
DC
06.3 AC 220 DC 52
PC
0
V3
6BA6
-.2
DC'
0 0 6.3
AC
85
DC
85
DC
.4 DC
V4
6BA6
-.2
DC
I006.3
AC
82
DC
82 DC 0
V5
6AU6/EF94
-.45
Del
0 0 6.3
AC
10
DC
44
DC
0
V6
6AU6/EF94
-2
DC
I0 0 6.3 AC 42 DC 85 DC 0
V7
12AX7/ECC83
215
DC
-1.5
DC**
17.5 DC 6.3 AC 6.3
AC
125 DC 0.9
DC
0
V8
6FG6/EM84
-4
DC
170
DC
06.3
AC
0170 DC 80 DC 170 DC 80
DC
V9
6V4/EZ80
255
AC
0285
DC
6.3 AC 00255
AC
0 0
1
Use
a100,000
fl
resistor
in
series
with
the
probe
when
measuring
these
indicated
voltages.
*
This
voltaj:e will
indicate
whether
or
not
the
local
oscillator
is
functioning
and
should
not
vary
by
more
than
one
volt
over
the
entire
tunmg
range
when
the
oscillator
is
properly
adjusted
for
the
FM
band.
In
measuring
this
voltage,
the
common
lead
of
the
VTVM
must
go to
the
cathode
(pin
#3).
**
This
voltage
must
be
measured
with
respect
to
pin
#3,
to
which
the
VTVM
cornman
lead
is
connected.
Quadruple
section
electrolytic
capacitor
lugs:
16
#1
285 DC #2 255 DC
113
225 DC
#4
220
DC.
5
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