Lafayette HA-63 User manual

HA-63
ma
ae
a
ane
en
ee
gp
hl
Re
No
aaa
fé
f
OPERATING MANUAL

TECHNICAL SPECIFICATIONS
PREQUENGY RANGE) n..--c52% She. cs bi dances.
OPERATION
INTERMEDIATE FREQUENCY
SENSITIVITY
SELECTIVITY
ANTENNA INPUT
AUDIO OUTPUT
AUXILIARY CIRCUITS
TUBE COMPLEMENT
POWER SOURCE
POWER CONSUMPTION ..
DIMENSIONS
NET WEIGHT
Band A: 0.55— 1.6Mc
Band B: 16 — 48Mec
Band C: 4.8 —14.5 Mec
Band D: 10.5 — 31.0 Mc
AM, CW.
. 455 Ke.
1zV for 10db S/N ratio.
. 30 db at +10 Ke.
. 50 — 75 ohms, balanced or unbalanced.
1.5 watts, 8 ohms impedance.
. Electrical Bandspread
Automatic Noise Limiter
AVC-MVC
BFO
“S”-meter
. V1 6BA6 RF Amp
V2 6BE6 Mixer
V3 6BE6 HF Osc
V4 6BA6 IF Amp
V5 6AV6 DET, AVC, ANL & Ist Audio Amp
V6 6AV6 BFO
V7 6AR5 Audio Output Amp
117 volts, 50/60 cycles AC

INSTALLATION
POWER SOURCE
The
receiver
is
designed
to
operate
from
a
117
volt,
50-60
cycle
AC
power
source.
DO
NOT
OPERATE
FROM
A
DC
SOURCE.
SPEAKER CONNECTION
A
two-terminal
strip
marked
SPEAKER
is
provided
at
the
rear
of
the
receiver
for
connections
to
a
PM
speaker
of
8
ohm
impedance.
Simply
connect
one
lead
to
the
ground
terminal
“O”
and
the
other
lead
to
the
terminal
designated
89.
The
output
power
of
the
receiver
is
sufficient
to
drive
a
4-12
inch
speaker
adequately.
HEADPHONES
A
standard
phone.
jack
is
provided
on
the
front
panel
of
the
receiver
for
headphone
reception.
Low
impedance
(8-16
ohms)
headphones
are
recommended
for
optimum
results.
Insertion
of
a
phone
plug
into
the
jack
automatically
disconnects
any
speaker
attached
to
the
8
ohm
output
terminal.
ANTENNAS
The
terminals
marked
“Al”,
“A2”,
and
“E”
at
the
rear
of
the
receiver
are
for
antenna
and
ground
connections.
Either
of
the
following
two
types
of
connections
can
be
used
to
obtain
satisfactory
results.
INVERTED “L” ANTENNA
The
inverted
“L”
type
of
antenna
will
provide
satisfactory
performance
over
the
entire
tuning
range.
Simply
short
A2
and
E
with
a
jumper
wire,
and
connect
one
end
of
the
antenna
wire
to
Al,
For
good
reception,
the
antenna
wire
should
be
placed
as
high
as
possible
and
50-100
feet
long
(see
Fig.
1).
In
most
cases,
a
wire
connected
from
terminal
“E”
to
a
cold-water
pipe
will
improve
reception.
DOUBLET ANTENNA
A
doublet
antenna
will
give
excellent
results,
especially
on
amateur
bands.
A
75
ohms
balanced
transmission
line
should
be
used
(as
shown
in
Fig.
2).
Since
the
doublet
antenna
provides
optimum
performance
only
at
a
given
frequency,
it
should
be
cut
to
the
length
for
the
most
often
used
band
of
frequencies.
The
overall
length
of
a
doublet
antenna
can
be
determined
by
using
the
following
formula:
468
in
f
SS
—————
L
(Length
in
feet)
Frequency
in
Megacycles
Since
the
doublet
antenna
displays
directional
properties
broadside
to
its
length,
it
should
be
installed
in
such
a
manner
that
maximum
signal
pickup
can
be
realized.
When
using
either
a
balanced
transmission
line
or
a
twisted
pair,
the
leads
connect
to
terminals
“A1”
and
“A2”
respectively,
and
the
jumper
wire
between
“A2”
and “E”
is
removed.
A
height
of
30-50
feet
is
recommended
for
good
reception
of
weak
signals.
=3 =

| | \ . A 468 ‘ |
(Feel) - FREQUENCY (Me)
== 50-100 FT. ee
| | |
ae O10 16 C19) -€{__16r
| | |
| |
|
|
|
7S
CH!
|
) | ae |
= |
|
“@)
©)
(o)}
ro
orouno
Ye)
_(s)
o-
crow
|
FIGURE 1 Single Wire Antenna (inverted L) FIGURE 2 Doublet Antenna
FUSE
A
1
amp
fuse
is
located
at
the
rear
of
the
receiver.
To
remove
it,
unscrew
the
spring
loaded
cap.
Replace
only
with
one of a
similar
rating.
th {DBA ees
he receiver (REMOTE) allows simultaneous control of this receiver with a
feahannittek: An external switching device can be used so that the receiver will be inoperative
during periods of transmission. In this case, the FUNCTION switch is placed in the
REC position. The contacts of the external switch are attached by means of a standard AC plug
so that the pins (see Fig. 3) will be connecled when signal reception is desired. This plug is then
inserted into the REMOTE socket. In this manner, plate voltage will be applied to the RF stages
when the switch is closed and signal reception will be instantaneous.
A socket in
For
normal
operating
conditions
with
no
external
switching,
place
the
FUNCTION
switch
in
the
REC
position,
thus
providing
plate
voltage
to
the
RF
stages.
To
manually
disable
the
receiver under
these
conditions, set the switch to the SEND position. In this position plate voltages to the RF stages are
cut off. Returning the switch to REC will provide instantaneous signal reception
HS signa
Disconnect a jumper wire connected internally
across REMOTE jack as shown in figure 3 when
EXTERNAL SWITCH is used.
FIGURE 3

OPERATION
Following
is
a
brief
description
of
the
functions
of
the
various
controls
on
the
front
panel.
Full
appreciation
as
well
as
realization
of
the
capabilities
of
the receiver
can
be expected
only
if you
become
familiar
with each
of
the
control
functions.
OFF — AC power is removed from the receiver. In all other positions AC power is applied.
REC — Heater and plate voltages are applied and the receiver is able to receive signals.
SEND — This position removes plate voltages to the RF stages, and thus makes the receiver in-
tem
operative (see previous section “Remote Socket’).
BFO — This position places the beat frequency oscillator in operation for the reception of code signals
(CW). The Bandspread control is used to adjust. the pitch of the tone produced on CW signals.
phe asl ae EOF i Or iphars
BAND
This switch selects one of the four frequency bands available as follows:
Band A: 0.55 to 1.6 Mc (550 to 1600 Kc)
Band B: 1.60 to 4.80Mec
Band C: 4.80 to 14.50 Mc
Band D: 10.50 to 31.00 Mc
MAIN TUNING
This control operates the tuning pointer over the main tuning dial. This dial has four calibrated fre-
quency scales, one for each of the four tuning bands. All frequencies shown are in megacycles (Mc).
Band A covers the Broadcast Band (550-1600 Kc). The other three bands cover the short-wave
range of 1.6-31.00 Mc. The amateur radio bands are contained within the thicker sections of the
white scale lines. Calibrations of these scales are correct only when the Bandspread dial is set to
100.
The main tuning dial also incorporates a 0 to 100 Logging Scale. This may be used to log any particular
short-wave station by noting the position of the main tuning pointer on the Logging Scale and
also noting the position of the Bandspread dial. A record may then be kept of both numbers so that
both Bandspread and Main Tuning can be quickly set to receive any of the short-wave stations logged
in this manner.
BANDSPREAD
This contro] is used to provide “fine tuning” over small sections of the main tuning scales. This
is especially useful on short-wave frequencies where separation between stations is often very small
or almost non-existent. When the Bandspread dial is set to 100, the main tuning pointer will indicate
the true received frequency. Rotating the Bandspread dial towards 0 subtracts from the frequency
indicated by the main tuning pointer.
The Bandspread control can be used in two ways — tv provide bandspreading over the amateur
bands, or as a fine tuning device to tune in commercial short-wave stations.
-5L

Set. the bands
spread
dial
to
100
and
the
main
tuning
pointer
to
the
extreme
right-hand
side
(high-
frequency
end)
of
the
amateur
band
which
you
wish
to
tune.
Rotating
the
BANDSPREAD
control
towards
0
will
now
tune
over
the
amateur
band
sclected.
Fine Tuning
Set
the
bandspread
dial
to
50
and
use
the
tuning
control
to
set
the
main
pointer
to
the
approximate
frequency
of
the
desired
station.
Now
use
the
bandspread
control
to
locate
the
station
by
tuning
in
either
direction
—
from
50
to
100
and
50
to
0.
ANTENNA TRIMMER
The
ANT
TRIM
control,
adjustable
from
the
front
panel,
acts
as
a
compensating
capacitor
to
permit
optimum
matching
of
the
receiver
to
the
antenna
at
all
frequencies.
Initially,
the
control
should
be
set
to
its
mid-position(
the
dot
on
the
front
surface
of
the
knob
at
12
o’clock
position).
The
control
should
always
be
adjusted
for
maximum
background
noise.
Each
setting
will
be
good
only
over
a
limited
range
of
frequencies.
The
trimmer
should
therefore
always
be
readjusted
after
tuning
to
the general
area
where
the
expected
signal
is
to
be
found.
AF GAIN
This
adjusts
the
audio
output
level
in
the
speaker
or
headphones.
AVOMVC
This
switch,
when
set
to
the
AVC
position,
places
the
automatic
volume
control
circuit
in
operation,
and
provides
effective
compensation
for
fading
and
maintains
relatively
constant
output
on
either
Seon
or
weak
signals.
The
MVC
position
makes
the
AVC
circuit
inoperative
and
should
be
used
only
w
added
sensitivity
is
required
during
the
reception
of
weak
signals,
If
MVC
is
used
with
strong signals, overloading and distortion will occur. Note that the S-meter is also inoperative in
the MVC position.
ANL
This switch should be normally set at “OFF”. If excessive spurious noises (such as those caused
by auto ignition) interfere with reception, turn the switch to “ON”, and the automatic noise limiter
circuit will be in operation. This control should be used only when necessary, since it tends to reduce
the overall efficiency of the receiver.
S-METER
This meter, calibrated in “S” units from 1 to 9, provides a means of measuring the relative strength
of incoming signais. It is operative only when the MVC-AVC switch is in the AVC position. An
adjustment control at the rear of the receiver permits calibration of the meter, as follows: Remove
antenna so that there is no signal input to the receiver and adjust the “S’” meter Adjust control for
a zero reading on the meter.
NOTE: Initial application of AC power to the receiver (from OFF to REC) may cause the pointer
to swing to the extreme right (full-scale) position. After warm-up, however, the pointer will return
to its normal operating position.
—-6-

a a
OPERATING INSTRUCTIONS
The
following
chart
indicates
the
initial
settings
of
the
various
controls
for
each
type
of
operation.
Thereaiter, (the: desree of strength croclarty: with. whi
proper readjustment of the various controls.
1 will depend upon
INITIAL CONTROL SETTINGS
|
CONTROL
|
AM
OPERATION
|
CW
OPERATION
|
|
FUNCTION
|
REC
|
BFO
|
BAND
Set
for
band
which
includes
desired
range
Set
for
band
which
includes
desired
range
of
frequencies
of
frequencies
|
ANT
TRIM
|
12
o'clock
position
|
12
o’clock
position
|
AVCO-MVC
AVC
MVC
|
ANL
|
OFF
|
OFF
|
]
AF
GAIN
|
Adjust
for
desired
audio
output
|
Adjust
for
desired
audio
output
|
AM OPERATIOT
For the reception of broadcast stations, short-wave ave etc., place all controls in the positions
indicated in the Initial Control Settings chart. Tune in station, using Main and andspread tuning
AS pi Bed pak. ie) ay eae nn ge. “Ge Aa a a a TAIT PNTTN
controls as indi itaLrea in a previous section describii ag fhe fu netions of MAIN TUNING and BAND
SPREAD controls. pciust ANT TRIM for pighe st “S’ meter reading on signal or for maximum
background noise, If excessive spurious 1 hi i
S
difficult, place the ANL OFF switch to the ON
uch as those caused by auto ignition make reception
CW OPERATION
The control settings required for the reception of CW (code signals) are the same as for AM except
that the Function switch is now set to BFO to produce the necessary tone. When tuned to the exact
frequency of the CW signal, a “zero beat” or “null” will be heard. Detuning slightly in either
direction (higher or lower in frequency) will produce a “beat” note. The Bandspread control can
therefore be used to vary the tone and provide clearest reception of the desired CW signal.
SHORT-WAVE LISTENING
On the short-wave frequencies are to be found radio stations transmitting from ali over the world.
Many of these stations provide English-language broadcasts. The frequencies on which the majority
of short-wave broadcast stations operate are found in the two upper bands of your receiver (4.8 to
14.5 megacycles and 10.5 to 31 megacycles). A characteristic of short-wave is that reception varies
with the time of day, the season of the year and with weather conditions. In order to know just when
and where to listen, a listening chart which lists English language broadcast stations best heard in
North America is included in this manuai.
“Better Shortwave Reception” by Wi
commended to the short-wave
wave radio for the beginner an
more experienced listener.

SERVICE
This
section
contains
information
which
will
aid
qualified
service
personnel
in
the
servicing
and
alignment of your receiver.
CHASSIS REMOVAL
The
top
cover
is
held
by
four
screws
—
two
each
side.
The
bottom
cover
is
held
by
six
screws
on the underside of the unit.
IF ALIGNMENT
EQUIPMENT REQUIRED:
AC Voltmeter
Calibrated RF Signal Generator
Non-Metallic Alignment Tools
Refer
to
the
diagram
which
shows
the
location
of
IF
adjustment
points.
1,
Connect
a
loudspeaker
to
the
output
terminals.
Remove
th
WARNING:
Make
sure
the
tuhe
retaining
clin
does
not
sli
the
underside
of
the
chassis.
» re
2. Set the receiver controls as follows:
FUNCTION switch on REC
AF GAIN control to maximum
MVC-AVC switch on MVC
Band to A
Main Tuning pointer to 1.6 Mc.
3.
Connect
the
voltmeter
(3
volt
AC
range)
across
the
sneaker
terminals
4.
Connect
the
signal
generator
between
pin
7
of
V2
socket
(6BE6
mixcr
tube)
and
ground
ulate i
i ae m+
6. Adjust the secondary and primary of IF transformers T2 and
During
alignment,
lower
the
generator
output
progressively
to
prevent
overloading.
alignment
until
no
further
improvement
is
noted.
oscillator V3, 6BE6, from its socket.
n rt
p
ormers
T2and
T1.
Follow
the
order
given
—
seconda
fi
rst,
then
primary
in
each
case.
Topside
adjustments
are
secondaries,
bottom
of
.
:
Repeat

IF ALIGNMENT — TOPSIDE ADJUSTMENT POINTS
ao Pw Nh
BFO ADJUSTMENT
All
receiver
controls
should
be
set
as
in
the
IF
alignment
with
the
exception
of
the
following:
FUNCTION
switch
to
BFO
Reduce
AF
GAIN
Set the generator to 455 Ke, unmodulated RF.
Adjust
the
BFO
coil
T3
until
a
zero
beat
is
heard
(also
accompanied
by
a
minimum
reading
on
the
voltmeter.
Note
that
the
minimum
point
will
be
bracketed
by
a
peak
on
each
side).
Switch
off
and
disconnect
AC
power
to
the
receiver.
Also,
remove
connections
from
the
gener-
ator.
Replace V3, 6BE6 oscillator.
Replace top and bottom covers on the receiver.
RF ALIGNMENT
Switch receiver on and allow it to warm up for approximately 15 minutes.
Using
a
short
jumper
wire,
connect
antenna
terminals
A2
and
E
together.
Connect
AC
voltmeter
(3
volt
range)
and
loudspeaker
across
speaker
terminals.
Connect
the
modulated
output
of
the
RF
signal
generator
to
antenna
terminals
Al
and
E.
Rotate
the
ANT
TRIM
control
until
the
capacitor
plates
are
half
meshed.
If
the
indicator
dot
on
control
knob
is
not
at
the
12
o’clock
position,
loosen
set
screw,
place
knob
in
this
position
and
tighten
screw
again
(without
disturbing
position
of
capacitor
plates).
Do
not
change
control
from
the
12
o’clock
position
until
alignment
is
completed.
Set
all
receiver
controls
as
for
IF
alignment.
Set
BANDSPREAD
dial
to
100
and
make
sure
FUNCTION
switch
is
on
REC.
Carry
out
alignment
as
indicated
in
the
chart.
Use
the
diagram
provided
which shows
RF
adjustment
points
on
the
underside
of
the
receiver.
NOTE:
Lower
generator
output
progressively
to
prevent
overloading
as
circuits
come
into
line.
-Uu—

RF ALIGNMENT CHART
| ares |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1
2
n
BAND
SWITCH
A
A
SIGNAL MAIN
GENERATOR TUNING | ADJUST REMARKS
.6 Mc (600 Kc) .6 Mc CO5 (Osc)*. Adjust for peak
reading on volimeter
| 1.4 Mc (1400 Kc) 1.4 Me | CO4 (Osc)
Repeat steps 1 & 2 until calibration is correct at both ends of scalé (.6 and 1.4 Mc)
Dp
ne
|
-
epeat steps 6 & 7 until calibration is correct at both ends of the scale (2.0 and 4.0 Mc)
bob
bi
peat steps 4 & 5 until calibration is.correct at buth ends of the scale (2.0 and 4,0
to
B
B
CG
Cc
|
1,4 Mc (1400 Kc) 1.4 Mc GM4 (RF)
Adjust for peak
2.0 Mc 2,0 Mc LO3 (Osc)
| reading on voltmeter
| 4.0 Mc 4,0 Mc CO3 (Osc)
~ as rw TAT
a, dvi a@,V dvi aalvi sg Lint } ‘s
|
Adjust
for
peak
4,0
Me
4.0
Mc
CM3
(RF)
reading
on
voltmeter
| 2.0 Mc 2.0 Mc |
| | Adjust for peak
5.0 Mc 5,0 Mc LO2 (Osc)
| | | reading on voltmeter
14.0 Mc 14.0 Mc CO2 (Osc)
\
Repeat steps 9 & 10 until calibration is correct at both ends of the scale (5.0 and 14.0 Mc)
1
Repeat steps 11
Repeat steps 14
|
Repeat steps
CG
CG
Cc
D
D
D
5,0 Mc. 5,0 Mc
LM2 (RF |
( ) Adjust for peak
14,0 Me | 14.0 Mc CM2 (RF) | reading on voltmeter
12 until calibration is correct at both ends of the scale (5.0 and 14.0 Mc)
t t |
5.0 Mc 5.0 Mc | LA2 (Ant) |
Adjust for peak
12.0 Mc | 12.0 Mc | LO} (Osc)
reading on voltmeter
26.0 Mc
COl (Osc) |
15. until calibration is correct at both ends of scale (12.0 and 26.0 Mc)
|
Adjust for peak
reading on voltmeter
| |
12,0 Me | 12.0 Mc | LM1 (RF)
26.0 Mc | 26.0 Mc | CML (RF) |
until calibration is correct at buth ends of scale (i2.0 and 26,0 Mc)
|
&
|
| 26.0 Mc
&
|
&
| Adjust for peak | 129 N Wa | TA
4G,Y a
*NOTE: On all bands, the oscillator is set on the high frequency side of the incoming signal,
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|

5] O
.
O
;
gq pueg
| RF ALIGNMENT
|
|
JINDERSIDE ADJUSTMENT POINTS
DIAL CORD STRINGING
es | ee
— M—%
POINTER
MAIN PULLEY <
FULLY COUNTERCLOCKWISE === f
\ CAPACITOR PLATES ya we
.\ FULLY OPEN wy _ FINAL 4
\
(
bp
a)
Te
Or
BAND
SPREAD
DIAL
CORD
STRINGING
| ha .
\ \& an Ye rN
2- STURNS i. \\
\
a
ff
&
\
BANDSPREAD
PULLEY
(
©
}}
: . A FULLY COUNTERCLOCK
| © ae Sa WISE CAPACITOR
Se . \\ aU } PLATES FULLY OPEN SS |
Ce 2 ie
| 4 b/
MAIN TUNING SHAFT Se
MAIN TUNING DIAL CORD STRINGING ——— FINAL TIE
= BANDSPREAD
eee SHAFT |
l aE
al oe
LAG
é
a
__

nib) eo. = z | ae
a
aT
—
t
wo
on!
fg
ul]
on
170
<5
|
S
-
|
——
y™
5
=
|
ne
fat
Te
=
&
"
fem
ae
[tet
ean
oo
Be
1
i
| |
wo
mS
?
©
L—__4
22D
HA
i#—_-*
Wan
eee
eet
Bes
At
+
ae
a
—,
et
ins
Oo,
B
710°0
Se
ra
§
Qa
e)
——O*"
o—
Se
oa
oft
oe)
peeks
al
oat
To)
|
|
eit
=}7
MPA
00
ma
8
bE
is
d
8
5
|
lI
.
ae,
sae
Bett
gtr
|
fe
oe
Nie
Q
Et
Logo
T
woot
or
9
|
ts
ee
a
©
os
|
ie
a
warn
CUtC‘<iC
ED
es
ees
5
Liat
men
oP
ta
~
|
Me
|
.
:
eee
—4-k
2
ee
Net
2
ee
710°0
29
a
lia
5
:
ares
t
=
Sree
—
N
|
N
>
wick
yzz
eu
|
_
NO
t
e
8
ky
|
fa
pera
e
ta
x
a,
4
|
os
ol
vn
t-
|
=
=
=
:
|
Me/
OSE
4
alg
(
|
N
|
-
|
>
Sy
*
SS
IE
|
IO
e+
|
|
—__ii
Yeetvertvenoo
|
oo
et
a
—
—
:
Wid.
NY
=
—
—
or
a
ee
ie
HP]
9}
“oro
69
go
|
ee
i
!
na
4K
xx
C
|
aes)
a:
ee
©
|
sy
MST
EY
1+
Le
-
4
fee
|
of
38
Tat,
oy
ee
|e
2
9
x
no)
!
Is
su
10°0
€3
wa
r
%
*
S.
|
cot
‘
a
Bee
he
2a
>
|
Ow
Sw
o
|
=
me
Ol”
r
,
:
ee
9
O
——wv
af
wey
otto
|
a
a
ee
BAR |
SS I i SD FSI 5 SE [SI SS CSRS SS SS ESR PEE NS A a aS SSA SN ain ist

ATIC DIAGRAM
s)
T
t
220V
ef AAA —f
os)
4
WOLb
Zid
Me/|
NOL?
ou
N
[)
0%
i)
3
|
ty
x
N
a
rn
SE
_——_N+—_—_8
©
Aos
“ol
AO?
70%
(Te) Te)
AVC
°
MVC
TS
S
aes
e
—
Nw
.
De,
WLe
ley
3FSI
7V
——-—-)—
UNCTION
6
F
POWER ON
LAMP —
AC II7V
50/60 %&,
HA-63