Heathkit UXR-1 User manual

INTRODUCTION
The Model UXR-1 is a six transistor superheterodyne receiver of advanced design using the latest prin-
ted circuit techniques to ensure the utmost reliability, consistency and ease of assembly.
Both the
medium and long wave bands are covered and the extra large 7! x 4"! high flux speaker will give ex-
cellent tone and volume.
which will give many years of service and the controls are
fabric.
The extremely attractive case is made of first grade hard wearing leather
gold trimmed matching the elegant speaker
SPECIFICATIONS
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GLOUCESTER
DAYSTROM
- 5 lbs.
200-550 metres (1500-535 kc/s.)
1000-1875 metres (300-160 kc/s.)
15 pV for 50 mW output.
x 4" High flux, wide angle diffusion.
. Drydex DT9, Ever Ready PP9.
300-400 hours average use.
. Mullard I - OC44, 2 - OC45, 1 - OC8ID
and 2 - OC81 plus |! - OA81 Diode.
. Standard E. 17148 High Grade Electrical
laminate with .0015 copper foil.
. Solid cowhide leather throughout.
5 lbs.
8 ozs,
LTD. ENGLAND

ENGLAND
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GLOUCESTER

PRELIMINARY NOTES AND INSTRUCTIONS
The
Step-»y-Step
instructions
given
in
this
manual
should
be
followed
implicitly
to
ensure
a
minimum
of
difficulty
during
construction
and
a
completely
satisfactory
result,
including
many
years
of
accur-
ate,
trouble-free
service
from
the
finished
instrument.
UNPACK
THE
KIT
CAREFULLY,
EXAMINE
EACH
PART
AND
CHECK
IT
AGAINST
THE
PARTS
LIST.
In
so
doing,
you
will
become
acquainted
with
the
parts.
If
a
shortage
is
found,
attach
the
inspection
slip
to
your
claim
and
notify
us
promptly.
Screws,
nuts
and
washers
are
counted
mechanically
and
if
a
few
are
missing,
please
obtain
them
locally
if
at
all
possible.
Lay
out
all
the
parts-so
that
they
are
readily
available
in
convenient
categories.
Refer
to
the
general
information
inside
the
covers
of
this
manual
for
instructions
on
how
to
identify
components.
Moulded
egg
containers
make
handy
trays
for
holding
small
parts.
Resistors
and
Capacitors
may
be
placed
in
the
edge
of
a
corrugated
cardboard
box
until
they
are
needed.
Use
lockwashers
under
all
screws
and
nuts,
and
also
between
controls
and
the
chassis.
When
solder
lugs
are
mounted
under
nuts,
the
use
of
lockwashers
is
unnecessary.
-
Resistors
and
capacitors
have
a
tolerance
rating
of
*
10%
unless
otherwise
stated.
Therefore
a
100K
ohm
resistor
may
test
anywhere
between
90
and
110K
ohms.
Frequently
capacitors
show
an
even
greater
variation
suchas
-50%to
+100%.
This
Heathkit
accommodates
such
variations.
Unless
otherwise
stated
all
wire
used
is
insulated.
Bare
wire
is
only
used
where
lead
lengths
are
short
and
there
is
no
possibility
of
a
short-circuit.
Wherever
there
is
a
possibility
of
the
bare
wire
leads
of
resistors
or
capacitors,
etc.,
shorting
to
other
parts
or
to
chassis,
such
leads
must
be
cov-
ered
with
insulated
sleeving.
To facilitate describing the location of parts, all valveholders, controls, tag strips, etc., have been
lettered or numbered. Where necessary all such coding is clearly shown in the illustrations. When
instructions say, for example, ''wire to socket G3". refer to the proper figure and connect a wire to
tag 3 of socket G.
All rotary switch tags are numbered clockwise when viewed from the rear of the wafer, i.e. the end
remote from the knob.
All resistors may be wired either way round.
All capacitors, excepting electrolytic capacitors, may be wired either way round.
Carefully letter and number tag strips, valveholders, transformers, etc. A wax pencil is ideal for
this purpose.
When mounting resistors and capacitors make sure that the value can be read when in position.
Observe
polarity
on
all
alectrolytic
capacitors,
i.e.
RED
=
POSITIVE.
Where connections to the ''Busbar" are referred to in the Step-by-Step instructions, the connections
should be made to the nearest point.
A circuit description is included in this manual so that those with some knowledge of electronics will
be able to obtain a clearer picture of the actual functioning of this instrument. It is not expected that
those with little experience will understand the description completely, but it should be of help in the
event that they desire to become more familiar with the circuit operation and thus learn more from
GLOUCESTER DAYSTROM LTD. ENGLAND

building the kit than just the placing of parts and the wiring.
Read
this
manual
right
through
before
starting
actual
construction.
In
this
way,
you
will
become
fam-
iliar
with
the
general
step-by-step
procedure
used.
Study
the
pictorials
and
diagrams
to
get
acquainted
with
the
circuit
layout
and
location
of
parts.
When
actually
assembling
and
wiring,
READ
THROUGH
THE
WHOLE
OF
EACH
STEP
so
that
no
point
will
be
missed.
A
tick
(Teneara
be
made
in
the
space
provided
at
the
beginning
of
each
instruction
immediately
it
has
been
completed.
This
is
most
important
as
it
will
avoid
omissions
or
errors,
especially
whenever
work
is
interrupted
in
the
course
of
construction.
Some
Kit-builders
have
found
it
helpful
in
addition
to
mark
each
lead
in
the
pictorial
in
coloured
pencil
as
it
is
completed.
Successful
instrument
construction
requires
close
observance
of
the
step-by-step
procedure
outlined
in
this
manual.
For
your
convenience,
some
illustrations
may
appear
in
large
size
folded
sheets.
It
is
suggested
that
these
sheets
be
fastened
to
the
wall
over
your
work
area
for
reference
purposes
during
instrument
construction.
The
Company
reserves
the
right
to
make
such
circuit
modifications
and/or
component
substitutions
as
may
be
found
desirable,
indication
being
by
''Advice
of
Change"
included
in
the
Kit.
NOTE:
Daystrom
Ltd.
will
not
accept
any
responsibility
or
liability
for
any
damage
or
personal
injury
sustained
during
the
building,
testing,
or
operation
of
this
instrument.
ALL
GUARANTEES
ARE
VOIDED
AND
WE
WILL
NOT
REPAIR
OR
SERVICE
INSTRUMENTS
IN
WHICH
ACID
CORE
SOLDER
OR
PASTE
FLUXES
HAVE
BEEN
USED.
WHEN
IN
DOUBT
ABOUT
SOLDER,
IT
IS
RECOMMENDED
THAT
ONLY
'"'60/40''
RESIN
CORE
RADIO
SOLDER
BE
PURCHASED.
PROPER SOLDERING PROCEDURE
Only
a
small
percentage
of
Heathkit
purchasers
find
it
necessary
to
return
an
instrument
for
factory
service.
Of
these,
by
farthe
largest
proportion
function
improperly
due
to
poor
or
improper
soldering.
Correct
soldering
technique
is
extremely
important.
Good
soldered
joints
are
essential
if
the
perform-
ance
engineered
into
the
kit
is
to
be
fully
realised.
If
you
are
a
beginner
with
no
experience
in
solder-
ing,
half
an
hour's
practice
with
odd
lengths
of
wire
and
a
valveholder,
etc.,
will
be
invaluable.
Highest
quality
resin-cored
solder
is
essential
for
efficiently
securing
this
kit's
wiring
and
components.
The
resin
core
acts
as
a
flux
or
cleaning
agent
during
the
soldering
operation.
NO
SEPARATE
FLUX
OR
PASTE
OF
ANY
KIND
SHOULD
BE
USED.
We
specifically
caution
against
the
use
of
so-called
"non-corrosive"
pastes
or
liquids.
Such
compounds,
although
not
corrosive
at
room
temperatures,
will
form
residues
when
heated.
These
residues
are
deposited
on
surrounding
surfaces
and
attract
moisture.
The
resulting
compounds
are
not
only
corrosive
but
actually
destroy
the
insulation
value
of
non-conductors.
Dust
and
dirt
will
tend
to
accumulate
on
these
"bridges"
and
eventually
will
cause
erratic
or
degraded
performance
of
the
instrument.
IMPORTANT
IN
THE
"STEP-BY-STEP"
PROCEDURE
the
abbreviation
''NS"
indicates
that
the
connection
shouldnot
yet
be
soldered,
for
other
wires
will
be
added.
Ata
later
stage
the
letter
'S"
indicates
that
the
con-
nection
must
now
be
soldered.
Note
that
a
number
appears
after
each
solder
(S)
instruction.
This
number
indicates
the
number
of
leads
connected
to
the
terminal
in
question.
For
example,
if
the
in-
structions
read,
'Connect
one
lead
of
a
47
K
ohm
resistor
to
tag
1
(S-2)",
it
will
be
understood
that
there
should
be
two
leads
connected
to
the
terminal
at
the
time
it
is
soldered.
This
additional
check
will
help
to
avoid
errors.
When
two
or
more
connections
are
made
to
the
same
solder
tag
a
common
mistake
is
to
neglect
to
solder
the
connections
on
the
bottom.
Make
sure
all
the
wires
are
soldered.
GLOUCESTER
-DAYSTROM
LTD.
ENGLAND

BEND LEAD
CLOSE TO
BODY
=
= =
=
PROPER MOUNTING
ul
UA
3”.
SRLEAD
ONLY
|
|
NE
erereeS
TD
—_
f
Fal
S
_
SOLDER
on
PROPER
SOLDER
7
went
af"
ONLY
CONNECTION
.
(MF.
LEAD
WAS
MOVED
SPREAD
LEADS
OF
EACH
COMPONENT
DeapAnvened
TO
KEEP
THEM
FROM
FALLING
OUT
NO
CONNECTION
=
253s,
(NO
LEAD
ee
<
WHEN
THE
BOARD
!1S
TURNED
5
SOLDER
AND
LEAD
BRIDGES
CIRCUIT BOARD WIRING AND SOLDERING
Before attempting any work onthe circuit board, read the following instructions carefully and study the figures shown.
It isonly necessary to observe a few basic precautions which will ensure proper operation of the unit the first time
it is turned on.
Proper mounting of components on the board is essential for good performance, A good general rule to follow is
that all components on the board should be mounted tightly to the board, unless instructions state otherwise. All
leads should be kept as short as possible to minimize the effects of stray capacity in the wiring. Proper and im-
proper methods of mounting are illustrated in the accompanying Figures,
Tubular capacitors and resistors will fit properly if the leads are bent, as shown. Disc capacitors will generally
fit inplace withno lead preparationother than determining that the leads are straight. Components with tags norm-
ally require no preparation unless the tags appear to be bent, in which case they can be straightened with a pair of
pliers. Parts should be inserted as instructed, and the leads bent outward slightly, as illustrated, to lock them in
place,
Components will be soldered in groups: after a group of components have been installed, instructions will be given
to solder them. When the components have been soldered, diagonal cutters may be used to cut off the excess leads
close to the board.
The actual technique of soldering leads to a circuit board is quite simple. Position the tip of the soldering iron so
that it firmly contacts boththe ci rcuit board foil and the wire or tag to be soldered, as shown. Then the solder should
immediately be placed between the iron and the joint to be soldered. Remove the solder as soon as it begins to melt
and flow on to the leadand foil. Holdthe tip of the iron in place only until the solder begins to flow outward over the
foil, Then remove the iron quickly. USE THE SMALL GAUGE SOLDER FOR THE PRINTED BOARD,
Avoid overheating the connection. A soldering pencil or small iron (approximately 30 watts) is ideal for use in cir-
cuit boardwork. If a higher wattage iron or soldering gun must be used, precautions must be taken to avoid circuit
board damage due to overheating.
The use of excessive amounts of solder will increase the possibility of bridging between foil conductors or plugging
holes which are to be left open for wires which may be added later on, If solder is accidentally bridged across in-
sulating areas between conductors, it can be cleaned off by heating the connection carefully and quickly wiping the
solder away witha soft cloth. Holes which become plugged can be cleared by heating the area immediately over the
hole while gently pushing the lead of a resistor through the hole from the opposite side, and withdrawing the lead be-
fore the solder rehardens. Do not force the wire through: too much pressure before the solder has time to soften
may separate the foil from the board, In cases where foil does become damaged, repairs can usually be made with
little difficulty. A break in the foil can be rejoined with a small piece of bare wire soldered across the gap, or be-
tween the foil and the lead of a component.
GLOUCESTER
DAYSTROM
LTD.
ENGLAND

If
the
tags
are
bright
and
clean
and
wires
free
of
wax,
frayed
insulation
and
other
foreign
substances,
no
difficulty
will
be
experienced
in
soldering.
Crimp
or
otherwise
secure
the
wire
(or
wires)
to
che
terminal,
so
a
good
mechanical
joint
is
made
without
relying
on
solder
for
physical
strength.
1,
CRIMP
WIRES
2.
HEAT
CONNECTION
3.
APPLY
SOLDER
ALLOW
SOLDER
TO
FLOW
COLD
SOLDER
JOINT
PROPER
SOLDERED
COLD
SOLDER
JOINT
CONNECTION
INSUFFICIENTLY
CONNECTION
CONNECTION
MOVED
HEATED
WHILE
COOLING
Typical
good
and
bad
soldered
joints
are
shown
above.
A
poor
soldered
joint
will
usually
be
indicated
by
its
appearance.
The
solder
will
stand
up
in
a
blobon
topof
the
connection,
with
no
evidence
of
flowing
out
caused
by
actual
''wetting'
of
the
contact.
A
crys-
talline
or
grainy
texture
on
the
solder
surface
caused
by
movement
of
the
joint
before
it
solidifies
is
another
evidence
of
a
"cold"
connection
and
possible
"dry
joint".
In
either
event,
reheat
the
joint
until
the
solder
flows
smoothly
over
the
entire
junction,
cooling
toa
smooth,
bright
appearance.
To
make
a
good
soldered
joint,
the
clean
tip
of
the
hot
soldering
iron
should
be
placed
against
the
joint
to
be
soldered
so
that
the
flat
tag
is
heated
sufficiently
to
melt
the
solder.
Resin
core
solder
is
then
placed
against
both
the
tag
and
the
tip
of
the
iron
and
should
immediately
flow
over
the
joint.
See
ill-
ustrations.
Use
only
enough
solder
to
cover
the
wires
at
the
junction;
it
is
not
necessary
to
fill
the
entire
hole
in
the
tag
with
solder.
Don't
allow
excess
solder
to
flow
into
valveholder
contacts,
ruining
the
sockets,
or
to
creep
into
switch
sockets
and
destroy
their
spring
action.
Position
the
work
so
that
GLOUCESTER
DAYSTROM
LTD.
ENGLAND

gravity teuds to keep the solder where you want it.
A
clean,
well-tinned
soldering
iron
is
also
important
to
obtain
consistently
perfect
connections.
For
most
wiring,
a
30
to
50
watt
iron,
or
the
equivalent
in
a
soldering
gun,
is
very
satisfactory.
Keep
the
iron
hot
and
its
tip
and
the
connections
to
be
soldered
bright
and
clean.
Always
place
the
solder
on
the
heated
"work"
andthen
place
the
bit
ontop
of
the
solder
until
it
flows
readily
and
''wets"'
the
joint
being
made.
Don't
take
the
solder
on
to
the
bit
and
then
try
to
bring
it
to
the
work
directly
from
the
solder-
ing
iron.
Whenever
possible
a
joint
should
be
secured
mechanically
by
squeezing
tight
with
pliers
prior
to
soldering
it.
The
hot
soldering
bit
should
frequently
be
scraped
clean
with
a
knife,
steel
wool
or
a
file,
or
wiped
clean
quickly
by
means
of
a
rag
or
steel
wool.
Don't apply too much solder to the soldered joint. Don't apply the solder to the iron only, expecting
that
it
will
roll
down
onto
the
connection.
Try
to
follow
the
instructions
and
illustrations
as
closely
as
possible,
Don't bend a lead more than once around a connecting point before soldering, so that if it should have
to come off due to a mistake or for maintenance it will be much easier to remove.
Follow these instructions and use reasonable care during assembly of the kit. This will ensure the
deserved satisfaction of having the instrument operate perfectly the first time it is switched on.
toc N ER
BSW
locating hole.
CHASSIS — FRONT VIEW-SHOWING
MOUNTING OF SPEAKER AND GROMMETS.
PICTORIAL.|I
GLOUCESTER DAYSTROM LTD. ENGLAND

eer ee
MOUNTING
OF
COMPONENTS
TO
METAL
CHASSIS
SEE
PICTORIAL
2A
Place
chassis
(Part
No,
200-102B)
on
your
workbench
as
shown
in
Pictorial
2A.
Mount
the
aerial
socket
to
chassis
at
position
SK
using
2
-
6BA
x
="
screws
with
lockwashers
and
nuts.
Mount
the
control
panel
(Part
No.
200-501B)tochassis
using
4
-
6BA
x
<''
screws
with
lockwashers
and
nuts,
Mount the volume control at location A.
Insert
3
small
grommets
in
the
holes
around
the
large
hole
at
location
C.
See
Pictorial
l,
Mount
the
two-gang
capacitors
at
location
C
using
3
-
4BA
x
3/8''
screws,
flat
and
lockwashers.
Tighten
these
screws
so
that
the
ends
just
appear
through
the
tapped
holes.
See
Pictorial
1,
Mount
the
wave-change
switch
at
location
BSW
using
the
location
hole
as
shown.
Bend
all
tags
outward
as
shown
in
Pictorial
2A,
This
is
to
allow
clearance
for
components
on
circuit
board
to
be
added
later,
Mount
a
4BA
solder
tag
at
location
H2
using
1
-
4BA
x
3/8"
screw
with
lockwasher
and
nut,
Mount
a
l-way
tagstrip
(with
one
earth
tag)
at
location
J
using
1
-
4BA
x
3/8''
screw
with
lock-
washer
and
nut,
Mount
the
large
transformer
at
location
TLS
using
2
-
4BA
x
3/8"
screws
with
lockwashers
and
nuts,
Mount
the
eliptical
loudspeaker
using
4
-
4BA
x
3/8''
screws
with
lockwashers
and
nuts,
See
Pic-
torial
I,
Mount
a
2-way
tagstrip
at
location
M
using
1
-
4BA
x
3/8"
screw
with
lockwasher
and
nut,
Mount
a
3-way
tagstrip
at
location
Y
using
1
-
4BA
x
3/8''
screw
with
lockwasher
and
nut,
Insert
the
two
large
grommets
at
locations
DF
and
EF.
Mount
the
ferrite
rod
aerial
through
grommets
DF
and
EF.
First
inserting
the
LW
end
through
grommet
DF
for
approximately
1",
Then
partly
withdraw
and
insert
the
other
end
through
grom-
BP.
Finally
adjust
the
ferrite
rod
centrally
with
the
BLACK
tags
facing
the
chassis
rear.
CHASSIS
WIRING
-
SEE
PICTORIAL
2B
Note:
Where
coloured
insulated
wire
is
used,
strip
back
the
insulation
q''
at
each
end
before
connecting,
(
(
)
)
Connect
a
2"'
length
of
BLACK
wire
between
tag
2
of
the
AE
coil
(S-1)
to
the
BLACK
tag
LW
(NS).
Connect
a
10"
length
of
BLACK
wire
between
tag
1
of
the
AE
coil
(S-1)
to
the
aerial
socket
SK
(S-1).
Route
as
shown.
Connect
a
3"!
length
of
BLACK
wire
between
BSW2
(NS)
and
BSW7
(S-1).
Dress
against
panel
as
shown.
Connect
a
bare
wire
link
between
BSW5
(NS),
BSW4
(S-1)
and
BSW-PI1
(S-1).
Connect
a
6"
length
of
RED
wire
between
BSW-P2
(S-1)
and
MI
(NS).
Connect
a
33''
length
of
ORANGE
wire
between
BSW10
(S-1)
and
the
ORANGE
tag
LW.
(Right-hand)
coil
on
ferrite
rod.)
(S-1).
Connect
a
35"
length
of
RED
wire
between
BSW2
(S-2)
and
the
RED
tag
LW.
(Right-hand
coil
on
ferrite
rod.)
(S-1).
Connect
a
33"length
of
GREEN
wire
between
BSW8(S-1)
and
the
GREEN
tag
MW.
(Left-hand
coil
on
ferrite
rod.)
(S-1),
GLOUCESTER DAYSTROM LTD. ENGLAND

ees
72+}
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See
NOTE-TAGS 3,6,9, & 12
ARE NOT USED ON
SWITCH BSW.
be
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puma
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Cit
ETT
AET
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Ny
ef
MOUNTING OF COMPONENTS
TO METAL CHASSIS.
PICTORIAL 2A,
GLOUCESTER
DAYSTROM
LTD.
Biappa

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4
CHASSIS WIRING
PICTORIAL 2B.
DAYSTROM
LTD.
]iuuuuaibestibes
GLOUCESTER

Connect
11
a
33"
length
of
YELLOW
wire
between
BSW11
(S-1)
and
the
YELLOW
tag
MW.
(Left-hand
coil on ferrite rod.) (S-1).
Connect
Connect
Connect
Connect
Connect
Connect
Connect
Connect
Connect
Connect
Connect
Connect
Connect
a
5"
length
of
RED
wire
between
Cl
(S-1)
and
BSW-P3
(S-1).
a
33"
length
of
BLACK
wire
between
BLACK
tag
LW
(S-1)
and
BLACK
tag
MW
(NS).
a
3"
length
of
BLACK
wire
between
H2
(NS)
and
BSW5
(S-2).
Route
as
shown,
a
3"
length
of
BLACK
wire
between
H2
(NS)
and
the
BLACK
tag
MW
(S-2).
a
4"
length
of
BLACK
wire
between
C3
(S-1)
and
H2
(S-3).
a
13"
length
of
BLACK
wire
between
Al
(S-1)
and
J1
(NS).
a1
KQ
resistor
(BROWN,
BLACK,
RED)
between
A2
(S-1)
and
J2
(NS).
the
GREEN
wire
from
transformer
TLS
to
the
loudspeaker
tag
2
(NS).
a
53''
length
of
BLACK
wire
between
the
loudspeaker
tag
2
(S-2)
and
tagstrip
Jl
(S-2).
the
YELLOW
wire
from
transformer
TLS
to
the
loudspeaker
tag
1
(NS).
the
BROWN
wire
from
transformer
TLS
to
tagstrip
M2
(NS).
the
RED
wire
from
transformer
TLS
to
3-way
tagstrip
Y1
(NS).
the
BLACK
wire
from
transformer
TLS
to
Y3
(NS).
Connecta
.25
yF
capacitor
between
Y3
(NS)
andthe
centre
tag
and
a
1002
resistor
(BROWN,
BLACK,
BROWN)
between
Y1
(NS)
and
the
centre
tag
(S-2).
MOUNTING
OF
COMPONENTS
TO
CIRCUIT
BOARD
SEE
PICTORIAL
3
Resistors and other components:
IMPORTANT:
When
mounting
components
to
the
circuit
board
MAKE
SURE
THAT
THE
WIRE
LEADS
ARE
REALLY
CLEAN
and
that
eachcomponent
sits
as
closely
as
possible
to
the
board
before
solder-
Bend
wires
to
suit
location
holes,
Carefully
examine
each
joint
after
soldering
referring
to
Figure
1
and
Page
6
for
examples
of
good
and
bad
soldering.
ing.
Do not solder any resistors until told to do so,
(
(
)
Connect
a
10
KQ
resistor
(BROWN,
BLACK,
ORANGE)
on
the
left-hand
side
of
circuit
board,
)
)
)
)
Connect
Connect
Connect
Connect
Connect
Connect
Connect
Connect
a 56 KQ resistor (GREEN, BLUE, ORANGE),
a 68 KQ resistor (BLUE, GREY, ORANGE),
CIRCUIT
an 8,2 KQ resistor (GREY, RED, RED). ta en vay
- a Sat a2 a 2
. H | Ze
a
1,2
KQ
resistor
(BROWN,
RED,
RED).
ae
|
||
ae
|
||
ae
RESISTOR. RESISTOR.
a
6802
resistor
(BLUE,
GREY,
BROWN).
GOOD,
BAD.
FIGURE-I.
a 4,7 KQ resistor (YELLOW, VIOLET, RED),
a 22 KQ resistor (RED, RED, ORANGE).
a 3.9 KQ resistor (ORANGE, WHITE, RED).
GLOUCESTER DAYSTROM LTD. ENGLAND

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MOUNTING OF COMPONENTS TO CIRCUIT BOARD
TOP DECK
Pal
GLOUCESTER
———
@oyV.Wiyu
Xo)
Mim
tey
ENGLAND

13
Connect a 1 KQ resistor (BROWN, BLACK, RED),
Connect a 6802 resistor (BLUE, GREY, BROWN).
)
)
( ) Connect a 33 KQ resistor (ORANGE, ORANGE, ORANGE),
) Connect a 10 KQ resistor (BROWN, BLACK, ORANGE).
)
Connect a 1 KQ resistor (BROWN, BLACK, RED).
( ) Connect a 102 resistor (BROWN, BLACK, BLACK).
( ) Connect a 3,9 KQ HIGH STABILITY resistor (value marked on
body), Location marked HS on circuit board,
( ) Connect a 1002 HIGH STABILITY resistor (value jageiea on RESISTOR AND
body). CAPACITOR
ASSEMBLY
( ) Connect a 4,72 HIGH STABILITY resistor (value marked on FIG.3
body).
( ) Connect a 1 KQ resistor (BROWN, BLACK, RED).
( ) Select a 3,9 KQ resistor (ORANGE, WHITE, RED) anda.ol
uF capacitor, Then solder together as shown in Figure 3,
( ) Connect the 3.9 KQ resistor and .01 pF capacitor to the circuit board.
( ) Nowcheckall resistors now mountedon the circuit board for correct value in the correct position,
(
)
Solder
all
resistor
wire
ends
tothe
circuit
board,
Cut
off
all
protruding
wires
as
close
as
possible.
Electrolytic Capacitors:
Note:
The
mounting
of
all
electrolytic
capacitors
will
now
be
described.
OBSERVE
POLARITY,
i.e.
RED end to position indicated +,
( ) Connect a 50 pF capacitor,
( ) Connect a 50 pF capacitor,
( ) Connect a 50 pF capacitor,
( ) Connect an 8 pF capacitor,
Paper Capacitors:
( ) Connect the 4 - ,04 pF capacitors to the positions shown.
( ) Connect the .05 pF capacitor to the position shown,
( ) Connect the .25 pF capacitor to the position shown,
Silver Mica Capacitors:
( ) Connect a 330 pF capacitor.
( ) Connect a 56 pF capacitor,
( ) Connect a 27 pF capacitor.
( ) Solder all capacitor wire ends the the circuit board, Cut offall protruding wires as close as possible,
GLOUCESTER DAYSTROM LTD. ENGLAND

14
MOUNTING OF SPILLS
( ) Insert the 19 soldering spills (short ends) at locations E, B, C and P and squeeze them to retain
until soldered.
( ) Now solder each of the 19 spills.
MOUNTING OF COIL AND TRANSFORMERS
( ) Mount an IF transformer (WHITE spot) (solder each tag).
( ) Mount an IF transformer (WHITE spot) (solder each tag).
GREEN SPOT
( ) Mount an IF transformer (BLUE spot) (solder each tag). “ a
OO
( ) Mount the oscillator coil (GREEN spot). The GREEN spot © O10 O
on the coil BASE must face the GREEN spot on the top of (oxo)
the circuit board (solder each tag), See Figure 4.
BASE OF
OSCILLATOR ‘CIRCUIT
( ) Mount the driver transformer TD, solder and cut off sur- eo otour BOARD.
plus wire from all transformers, FIG.4 ,
( ) Mountthe crystal detector D1], position RED end+as shown,
Now solder and trim wire ends.
( ) Strip back the insulation 1" at each end of a 23" and 1$" length of BLACK wire.
( ) Refer to Pictorial 4 and an unoccupied hole will be found near each IF transformer can,
( ) Fromthé hole near the blue transformer take the 25" long insulated wire link to the hole near the
adjacent white transformer.
( ) Take the 13" long insulated wire link from the same white transformer to the other white trans-
former,
( ) Solder all three points.
EXTERNAL WIRING FROM CIRCUIT BOARD
( )
Connect
oneendof
a
5"
length
of
GREEN
wire
to
location
GW
(S-1).
Remove
1"
of
insulation
from
other
end.
Connect one end of a 5" length of BLUE wire to location BLW (S-1).
8
( ) Connect one end of a 4" length of YELLOW wire to location YW (S-1).
( ) Connect one end of a 4" length of RED wire to location RW (S-1).
( ) Connect one end of a 43"! length of WHITE wire to location WHW (S-1).
Connect one end of a 5'' length of BLACK wire to location BW (S-1).
&
( ) Connect one end of a 5" length of ORANGE wire to location OW (S-1).
Connect one end of a 4'' length of BROWN wire to location BRW (S-1).
&
( ) Connect one end of a 6" length of GREY wire to location GWY (S-1).
(
)
Connecta
YELLOW
wire
link
between
location
X
and
Z
on
the
metal
foil
side
of
the
circuit
board.
(See
Pictorial
4.)
GLOUCESTER
DAYSTROM
LTD.
ENGLAND

ENGLAND
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SHOWING
METAL
SIDE
OF
CIRCUIT
BOARD
WITH
WIRE
LINK.
PICTORIAL
4
GLOUCESTER

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—————
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BATTERY
WIRING AND FIXING OF
CIRCUIT BOARD TO CHASSIS.
PICTORIAL. 2C.
GLOUCESTER
DAYSTROM
LTD.
]iasuueeeiiiioutaDe

WIRING OF TRANSISTORS TO CIRCUIT BOARD
17
Note:
Important,
Refer
to
the
block
diagram
for
transistor
type
reference.
A
RED
or
WHITE
spot
is marked at the wire end of each transistor,
dicated on the circuit board,
The
wire
nearest
this
spot
must
be
connected
to
C
in-
Connect
the
other
two
wires
to
Band
E.
As
TR5
and
TR6
will
subse-
quently
be
clamped
to
the
chassis,
ensure
that
no
more
than
3/16"
of
each
lead
is
inserted
into
the
spill
before
soldering.
This
will
avoid
undue
strain
on
the
leads
when
securing
the
heat
sink
clips.
(
(
(
)
Select
the
6
transistors
and
cut
each
wire
lead
to
7/8".
)
Cut
the
length
of
sleeving
into
18
-
3/8''
lengths.
)
Place
a
3/8"
length
of
sleeving
over
each
transistor
lead,
)
Bend
the
wires
of
each
transistor
to
form
a
hook
at
the
ends,
see
Figure
5,
)
Connect
the
3
wires
of
TRI
to
the
spills
C,
B
and
E
(solder
each
wire).
)
Connect
the
3wires
of
TR2
to
the
spills
C,
B
and
E
(solder
each
wire).
)
Connect
the
3
wires
of
TR3
to
the
spills
C,
BandE
(solder
each
wire).
)
Connect
the
3
wires
of
TR4
to
the
spills
C,
Band
E
(solder
each
wire),
)
Connect
the
3
wires
of
TR5
to
the
spills
C,
B
and
E
(solder
each
wire).
)
Connect
the
3
wires
of
TR6
to
the
spills
C,
Band
E
(solder
each
wire),
FIG.5
)
Select
the
P
shaped
clips
and
slide
one
on
each
transistor
TR5
and
TR6,
position
as
shown,
WIRING OF CIRCUIT BOARD TO CHASSIS
SEE PICTORIAL 2C
)
Position
circuit
board
to
chassis.
Do
not
fix
into
position
yet.
Now
connect
the
coloured
wires
in
the
following
order:
(
(
)
Pass
the
GREEN
wire
through
tag
C2
(tuning
capacitor)
and
solder
at
spill
P
)
Connect
the
BLUE
wire
to
BSW]
(S-1).
)
Connect
the
YELLOW
wire
to
BSW-P4
(S-1).
)
Connect
the
BLACK
wire
to
Y3
(S-3).
) Connect the RED wire to Y1 (S-3).
) Connect the ORANGE wire to J2 (S-2).
) Connect the BROWN wire to A3 (S-1).
) Connect the GREY wire to M2 (NS).
)
Connect
the
WHITE
wire
to
the
loudspeaker,
tag
(S-2).
)
Now
secure
circuit
board
to
chassis
using
4
-
6BA
x
4''
screws
and
washers.
GLOUCESTER
DAYSTROM
LTD.
Now solder at C2.
ENGLAND

18
(
)
Select
the
two
lengths
of
BLACK
and
RED
flexible
wire.
(
)
Connect
the
RED
wire,
one
end
to
the
copper
coloured
battery
connector
(S-1)
as
shown
on
detail
below
and
the
other
end
to
MI
(S-2).
( )
In
a
similar
manner
connect
the
BLACK
wire,
one
end
to
the
other
battery
connector
(S-1)
and
the
other
end
to
M2
(S-3).
(
)
Using
a
6BA
x
¢""
screw,
nut
and
lockwasher,
secure
the
heat
sink
clips
on
the
OC81
transistors
to
chassis,
with
the
nut
on
the
inside,
(
)
Check
the
position
of
all
transistors
against
the
block
diagram.
(_)
Finally
insert
the
battery,
thenthread
the
positioning
strap
and
lock
tight,
using
the
studs
provided.
Do not connect the RED and BLACK leads to the battery yet.
TRANSISTOR TYPES
Circuit
Ref.
Transistor
Type
Spot
Coleus,
Collector
Top
TRI
|
OC44
RED
YELLOW
TR2
|
OC45
RED
ORANGE
Mullard
TR3
OC45
RED
BLUE
Mullard
TR4
|
Oc8s1D
RED
Foe
|
Mullard
.
Mullard
Mullard
"REPLACE
LASTIC
TRANSISTOR.
GLOUCESTER
DAYSTROM.
LTD.
ENGLAND

19
TRANSISTOR VOLTAGES
EMITTER COLLECTOR
Important: Before connecting the supply leads to the battery and switching on, re-check the connec-
tions of all transistors, also the BLACK and RED leads to the battery. If the battery connections are
reversed, permanent damage to the transistors may result.
If a transistor has to be removed or replaced, a heat shunt, such as a pair of pliers, must be used as
shown in Fig. 5.
ADJUSTMENT PROCEDURE
Temporarily fit station name dial over variable capacitor spindle and align centrally to front panel.
Secure with adhesive tape.
Now slide tuning knob with pointer attached over the spindle. Adjust pointer to the horizontal position,
with the variable capacitor spindle fully anti-clockwise.
Double check the installation of battery and transistors before attempting to operate your UXR-1 Tran-
sistor Receiver. Errors could cause non-operation or damage to the components in the receiver.
When reasonably sure that no errors exist, plug in the battery leads and switch to the Medium wave-
band. Turn the volume control fully clockwise, and a slight rushing sound should be heard. If no sound
is heard, switch the receiver off and refer to the section ''Fault Finding". If operation appears normal,
you may proceed with the adjustments required to obtain maximum performance.
Read each step completely before performing the operation described.
STEP ONE
A. Turn BOTH adjusting screws on the variable capacitor down tightly without forcing.
B. Loosen EACH screw half a turn.
GLOUCESTER ——— @ipy- wana vo). mm muy ENGLAND

20
STEP TWO
ADJUSTING LF.
TRANSFORMERS
This procedure willadjustthe IF amplifiers.
A, Tune in any weak station,
B. Using the alignmenttool provided, care
fully adjust the core of T3 (BLUE spot)
left or right toobtain maximum volume.
Now adjust the T2 (WHITE spot) and Tl
(WHITE spot) inasimilar manner, Re-
peat the procedure,
The I. F. transformers are aligned approx-
imately when supplied and only small adjust-
ments should be necessary.
Normal positions for the cores are: blue
spot, about 1/8''belowthetopofthe formers
FIG.7 and both white spot transformer cores about
1/16" above the top of the former.
ADJUSTING
OSCILLATOR
TRIMMER
STEP THREE
This step will adjust the oscillator circuit
so that the dial will indicate correctly the
station wavelengths.
A. Set the dial to any station of known
wavelength below 300 metres.
B. Adjust the screw on the rear section
ofthe tuning capacitor until you receive
the required station,
Another radio may prove helpful in id-
entifying the chosen station, as several
stations will probably be heard whilst
making this adjustment,
GLOUCESTER
DAYSTROM
LTD.
ENGLAND
ay