Lafayette STARFLITE KT-390 User manual

FR - D2O
assembly
manual
STARFLITE
90 WATT TRANSMITTER

EE
6 vi v3 7
[x3}—0 BCLE 6CL6 6146 ON TER
OSCILLATOR a DRIVER | FINAL AMPLIFIER
(x5}—_S ) . L
v4 V5
|2AXT 6DE7
SPEECH AMPLIFIER MOOULATOR
BLOCK DIAGRAM
SUPPLY
HEATER
CIRCUIT DESCRIPTION
While reading the circuit description, refer to both the Block and Schematic diagrams,
OSCILLATOR
The oscillator stage, V1, functions as a modified Pierce crystal oscillator, The crystal selector
switch SW-1] is used to select the desired crystal, When VFO operation is desired, the VFO output is
connected to the VFO INPUT jack and V! then operates as a buffer stage. The oscillator may be
operated at the fundamental frequency of either an 80 or 40 meter crystal, The plate circuit is
untuned for 80 meter operation, coil L1 having no effect in the circuit on this band, The plate circuit
ie alug tuned by coil Ll for operation on 49 through 10 meters,
The output of Vl is coupled to y2 (the driver stage) through capacitor C4,
DRIVER
The driver tube, V2, is operated as a class C amplifier, Its plate circuit is tuned to the desired op-
erating frequency by coil L3 (or portions thereof, selected by Band Switch SW-Za) and variable capacitor
C8 (DRIVE TUNE). This stage operates straight through on 80 and 40 meters, as a doubler on 20
leas sn il n —o
Tt tore, =
The DRIVE LEVEL control, R5, varies the screen voltage of Y2 and thus controls the output (drive},
which is coupled to the prid of the final amplifier through capacitor C1z,
FINAL AMPLIFIER
Final amplifier tube V3 operates straight-through on all bands as a shunt-fed, neutralized amplifier,
The tank circuit is made up of C20 (FINAL TUNING), Lé4 (or portions thereof, selected by Band Switch
SW-2b}, and C22 (FINAL LOADING), C22 consists of three 450 ppf parallelled sections to eliminate the
need for switching fixed capacity into or out of the circuit when changing bands, (C21 is added to the
tank circyit on 80 meters to maintain a good L-C ratio on this band,
The output ie fed through a 3-section low-pass filter with a cut-off point of approximately 34MC, ef-
fectively suppressing RF energy above this frequency. The output should be connected ta a 50-75 ohm
unbalanced line,
Grid or Plate current of the final amplifier is read by proper positioning of switch SW-4 (METER switch).
In the "Grid" position, the meter reads the voltage developed across resistor Ri0, and thus, in effect,
measures the grid current passing through this resistor,
In the "Plate" position, the meter reada the voltage developed acrose the resistor R13, and thus meas-
ures the current drawn through this resistor, Although cathode current is actually the combined grid,
acreen, and plate current, the reading may be taken as a true indication of plate current, The error
cauged by the addition of grid and screen current is very ammall and on the legal side,

yt &
SPEECH AMPLIFIER
V4, atwin trinde, operates as
second triode section is couple
MODULATOR
The
modulator
tube
V5
consists
of
two
dissimilar
triodes,
one
with
a
power
rating
of
1.5
watta
and
the
other
7
watts.
The
output
of
the
lower
power
triode
ia
coupled
directly
to
the
grid
of
the
higher
power
triode
which
is
eactually
the
modulator,
The
cathode
of
the
modulator
section
is
coupled
to
the
screen
prid
of
V3
(final
amplifier)
through
R25
and
C30.
The
bias
on
V5
1s
so
arranged
that,
with
no
audio
mput
signal,
conduction
of
the
tube
is
limited
(low),
This
allows
the
screen
voltage
of
the
final
amplifier
V3
to
remain
at
a
low
value,
thus
reducing
the
plate
current
of
V3
to
a
low
resting
state,
When
an
audio
signal
is
applied
to
¥5,
conduction
in
the
modulator
section
increases,
raising
the
screen
voltage
of
¥3,
This
causes
an
increase
in
the
plate
current
of
V3
with
modulation
producing
a
controlled-carrier
effect,
“iy
Sy
GRID BLOCK KEYING
ry
ollowing
way:
With
the
key
plug
inserted
and
in
the
key
up
position,
a
high
bias
voltage
(several
times
the
normal
grid
bias}
is
placed
on
the
grids
of
tubes
V1,
VZ
and
V3.
This
cuts
these
tubes
off
and
there
is
no
transmitter
output.
eving ig achievedi
Keying af GOT YOU Li
In
the
key
down
position,
R&S
is
shorted,
removing
the
high
bias
voltage
from
VI
and
¥2,
Also,
the
bias
voltage
to
V3
is
reduced
to
a
normal
operating
value
through
RY,
The
amount
of
fixed
bias
on
V3
is
sufficient
to
protect
the
tube
should
the
drive
be
accidentally
removed.
The
values
of
RA
and
C2
were
chosen
to
provide
the
most
desirable
waveform
on
CW.
a
woe
bees
Vi Vv V3
RI
|
ws
Ri
—
&
=
—-130V
:
GRID
BLOCK
KEYING
voy
,
POWER SHPPLY
The
B+
supply
is
derived
from
four
silicon
diodes
(D2,
D3, D4, D5)
ina
voltage
doubler
circuit,
Filtering
is
provided
by
C34,
C35,
C36,
and
resistora
R28,
R29.
The
bias
voltage
for
grid
blook
keying
is
developed
by
silicon
diode
D-1
in
a
half-wave
xrectifiar
cir-
cuit,
Filtering
is
provided
by
C33
and
R27,
~
cd +
A
separate
winding
provides
6,3
volts
at
4
amps
at
the
accessory
power
socket
for,
YFO
flaments
or
other
accessory
equipment,
eof
Os

OPERATION
An Amateur Radio Operator and Station License must be obtained before placing this transmitter on
the air, If you require any information regarding licensing and amateur frequency allocations, contact
the Federal Communications Commission PCr. ae thse Asssvizan Badin Delta
Ths WVOMTLTTUMLCOTONe WOTYc ion pe OF Pe GEC PIiCah aa wlaay League {ARRL).
ANTENNAS
The pi network output circuit of the KT-390 will match pure resistive loadsa of 50 to 75 ohms, A simple
"dipole" antenna, constructed so that its lenpth is a half wavelength at the frequency of operation, of«
fers a good match for this transmitter, Other antennas falling into the 50-75 ohm range are beams,
verticals, and trapped antennas Useful information on n this subject can be found in the Radio Ama-
CRYSTAL OPERATION
Recommended crystals for operation on the various bands are as follows:
BAND FUNDAMENTAL CRYSTALS
60 meters 160 or 80 meter crystals
40 meters 80 or 40 meter crystals
20 meters 80 or 40 meter crystals
15 metera 40 meter crystals
10 meters 40 meter crystals
Pin spacing 0,486" Pin size .093 dia,
NOVICE OPERATION
Novice operation is restricted to the following frequencies,
BAND FREQUENCY ALLOCATION
80 meters 3700 - 3750KC
40 meters 7150 -7200KC
15 meters 21, 100 ~ 21, 250KC
Novice power input is limited to 75 watts, In the operating instructions, the final amplifier is loaded
to 120 ma for novice operation (as opposed to 150 ma for regular operation), This keeps power input
within the present novice power limitation,
CAUTION
Be sure to check the latest FCC regulations regarding amateur frequency allocations and power input
requirements, When ordering crystals, be sure to stay well within the assigned bands of frequencies
or a violation will result,
ACCESSORY SOCKET
The accessory socket at the rear of the transmitter supplies the following:
6,3V AC at 4 amps Pin 7
300V DC at 50 ma Pin 3
*~-50¥ DC Bias Pin 8
Pin 5
110V AC (for Relay) (Pin 6
Ground Pin 1
This bias voltage has been made available for grid block keying of a VFO, Slight modification of the
VFO may be necessary in order to make use of this voltage, Information on any changes necessary
for grid block keying of your VFO can usually be obtained from the manufacturer,

NOTE: When using a VFO with an output impedance lower than 47K (this applies to link-coupied types as
well), it will be necessary to add a decoupling capacitor in series with the VFO input to the transmitter,
18.
OPERATING INSTRUCTIONS
FOR “AM” OR “CW”
Plug the line cord into an AC outlet, Make sure the antenna is connected and that desired crystals
(or VFO} are installed,
Place the MODE ewitch in the "standby" position, -
Set DRIVE LEVEL and DRIVE TUNE to approximately 1, L fo ° “4
Using the CRYSTAL SWITCH, select desired crystal (or VFO).
Select the desired BAND,
Set the FINAL TUNING control to the panel marking for the band being used,
Set the FINAL LOADING control fully counter-clockwise,
Set the METER switch to "Grid",
Set the MODE switch to "'Tune''!,
Adjuet DRIVE TUNE for maximum grid reading on the meter,
Adjust DRIVE LEVEL for 2,5 ma grid current,
Change METER switch to the ''Plate'" position.
Set MODE switch to "'AM'",
Adjust FINAL TUNING for minimum plate current reading (dip).
Set MODE switch to CW,
mall steps, adjusting the FINAL TUNING for
mi =
munimum pla fa currant fdin 4 fter each ston
120 ma for NOVICE operation,
150 ma for REGULAR operation,
Set METER awitch to "Grid", Re-adjust DRIVE TUNE for a maximum grid reading, then re-set
DRIVE LEVEL for 2,5 ma,
Return METER switch to "'Plate'! and the MODE switch to 'STBY'",
FOR CW OPERATION
1
2
Insert key plug in KEY jack,
To transmit, switch MODE to "CW" and proceed,
FOR AM OPERATION
3.
lf inserted, remove key plug (or close the shorting bar if the key is so equipped),
Attach microphone to MIKE connector,
To transmit, switch MODE to "AM" and proceed,

OPERATING NOTES
1,
Operating
the
transmitter
without
a
crystal
(or
VFO),
a
proper
antenna
or
dummy
load
will
result
in
component
failure.
2,
Operating
the
transmitter
with
the
final
amplifier
not
tuned
to
resonance
(minimum
plate
current)
may
damage
the
final
amplifier
tube,
3.
Never
switch
directly
from
OFF
to
the
AM
or
CW
positions
or
the
final
amplifier
tube
will
be
damaged,
Always
switch
to
the
"STBY"
position
first,
leaving
the
mode
switch
in
thia
position
for
at
least
60
seconds
before
attempting
to
operate
the
transmitter.
This
will
allow
the
tubes
to
reach
normal
operating
temperatures.
4,
If
you
change
your
operating
frequency
by
more
than
a
few
kilocycles,
it
may
be
necea sary
to
re-
tune
the
driver
and
final
amplifier
stages,
-
5.
Never
cover
the
perforations
in
the
top
of
the
cover
or
ventilation
will
be
restricted,
Failure
to
observe
this
precaution
will
result
in
sharply
reduced
component
and
tube
life,
IN THE EVENT OF DIFFICULTY
A,
If
all
of
the
tubes
remain
unlit
when
the
transmitter
is
turned
on,
or
if
they
suddenly
go
off,
check
to
sce
that
the
fuse
is
intact.
Uf
it
is
not,
replace
it
with
one
of
the
same
value
(see
parts
list}.
Should
the
fuse
blow
again,
a
short
or
a
component
failure
must
be
suspected,
B., Carefully re-check all wiring and valuea of components inserted against the inatructions. If you
have
not
already
done
ao,
trace
each
lead
and
component
in
the
pictoriala
with
a
colored
pencil.
It is frequently helpful to have a friend check your work with you as there is a tendency for the
constructor to repeat his errors,
C. Inspect all solder connections carefully. A large number of kits returned for repair haye been
found
defective
due
to
poox
solder
connections,
Therefore,
any
doubtful
connections
should
be
re-
heated to make gure they are correctly soldered,
BD, Check for small piecea of solder or wire which may have fallen into the chassis, Make sure that
the use of excess solder has not caused a short between adjacent terminals or nearby wiring, par-
ticularly on tube sockets and switch terminala,
E.
Check
all
tubes
with
a
tube
tester,
or
by
substitution
with
tubes
of
the
same
type
and
known
to
be
good,
F,
A
resistance
chart
has
been
included
as
an
aid
in
locating
defective
componenta
and
to
permit
a
careful
stage-by-stage
check
of
the
unit,
If
any
of
the
readings
obtained
differ
widely
from
those
provided
in
the
chart,
recheck
that
part
of
the
circuit
involved
carefully,
If
the
wiring
and
con-
nections
are
correct,
component
failure
must
be
euapected,
G,
If
you
are
still
unable
to
locate
the
trouble
and
a
vacuum-tube
voltmeter
is
available,
check
the
voltage
readings,
referring
to
the
voltage
chart.
A
variation
of
+15%
may
be
considered
normal,
If
any
voltage
is
incorrect,
recheck
that
part
of
the
circuit
involved
carefully.
If
the
wiring
and
connections
have
already
been
checked
and
found
correct,
the
trouble
will
probably
be
due
to
a
de-
fective
part
(tube,
capacitor,
resistor,
etc.),
CAUTION:
EXERCISE
GREAT
CARE
WHEN
MAKING
ANY
CHECKS
WITH
THE
UNIT
TURNED
ON,
lf
there
are
obvious
signs
of
a
short
circuit
(components
becoming
discolored
or
amoking)
do
not
attempt
to
make
yoltage
checks,
Switch
the
unit
off
and
remove
the
AC
plug
until
the
short
circuit
has
been
lo-
cated
and
the
trouble
corrected,
Parts
found
defective
may
be
returned
(postpaid)
to
ue
for
replacement,
[If
they
are
covered
by
the
re-
placement
warranty,
new
parte
will
be
sent
to
you
at
no
charge.
AJ]
packages
should
be
addressed
to
the Kit
Adjustment
Division,

Part No,
12-219
12-205
12-193
12-194
12-196
12-220
12-197
12-198
12-199
12-190
12-2
12-191
12-34
12-22
12-192
12-79
12-200
12-201
12-202
12-203
12-204
12-82
12-11
23-37
23-38
23-39
23-40
23-41
23-42
235-32
22 22
os -F
23-43
23-34
15-43
14-46
14-47
14-45
14-17C
20-23
20-22
20-47
20-74
20-20
20-311
20-312
20-313
20-305
20-314
20-317
20-43
Circuit Designation
C23/R16
C18
C36a, b
C34, 35
C25
C33a, b
cs
C20
C22
C2,5,6,7,9, 14, 13, 14,
15, 16, 17, 37, 38, 39
cl
c4
C3, 12, 29
C2t
cal
c24
C40, 43
C41, 42
c19
clo
C26, 28
C31, 32
C30
Description
CAPACITORS
Tube-~R-Kap (combined 560K ohms /100 ppl}
0,003 pf 1o00¥y feed-through
40-40 pf 450Y electrolytic
30 pf 450V electrolytic (with insulating covering)
10 pf 350V electrolytic (with insulating covering)
10-10 pf 150V electrolytic (with insulating covering)
25 wpf variable (DRIVE TUNE)
140 put variable (FINAL TUNING}
3 gang variable, 450 put per section(FINAL LOADING)
0,005 pf 500V 20% ceramic disc
0,001 pf 500y 10% ceramic disc
50 ppf S00V 10% ceramic disc
100 ppf 500V 10% (N750} ceramic disc
470 ppf 500V 10% ceramic disc
68 pf 3KV 10% ceramic disc
0,002 pf 500V 10% (may be marked 2000)
47 pi 300V 10% molded mica
180 ppt 300V 10% molded mica
0,001 pf 2000V 20% molded mica (marked 12-202)
120 pp£ 1500V 20% molded mica (marked 12-203)
0.005 pf 400V 20% molded paper
0,01 pf 600V 20% molded paper
0,05 pi 400V 20% molded paper
COILS, CHOKES, TRANSFORMERS
RF choke 1 mh
RF choke 1,1 mh
RF choke .4 ph
.32 ph low-pass filter coil (yellow dot)
-44 ph low-pass filter coil (green dot)
.5 ph low-pass filter coil (blue dot)
40 meter oscillator coil
Dvi-er sinte 2631
afFiyeor peatc cols
Parasitic choke
Pi-net tank coil
Power transformer
SWITCHES
5-position 1 section rotary (MODE switch)
6-position 1 section rotary (CRYSTAL switch)
5-position 2 section rotary (BAND switch}
DPDT slide switch (METER)
TERMINAL POSTS
3-lug
4-lug
3-lug
1-lug
2-lug
4-lug
5-lug
5-lug
3-lug
3-lug
Z-lug
2-lug
Quantity
A a —
Bw Nh ee Nw ON ee Re Re te Oe
ee ee ee | lll el ee oo oe oe A 38 ed
De a el

Part No,
19-46
19-30
19-45
19-3
20-282
19-25
20-228
26-51
26-38
26-1
26-52
17-23
17-24
10-152
1o0-151
io- 150
10-149
10-148
10-147
10-146
10-145
16-144
10-143
10-142
19-141
27-5
20-173
20-304
20-290
an an
ey he
20-310
20-309
20-198
20-11
20-315
20-318
20-215
20-175
26-12
20-210
20-75
20-33
22-150
22-90
22-147
18-70
18-69
22-10
22-11
22-42
Circuit Designation
pantalla paeeln nana nua
ys
yil,v2
4
V5
D2, 3, 4,5
D1
Deacription
SOCKETS, JACKS, CONNECTORS
Octal tube socket
Noval tube socket
Crystal socket
RGA phono jack (VFO input)
Coaxial connector (RF OUTPUT)
Closed-circuit jack (KEY jack), with hardware
Mike connector (MIKE input), with hardware
TUBES AND DIODES
cou oar
6146 tube
6CL6 tube
1ZAX7 tube
6DE7 tube
Silicon diode (marked 1723)
Silicon diode (marked 1724)
SHEET METAL PARTS
Cover plate
Shield bracket
Shield bracket
Crystal socket bracket
Final amplifier shield (rear)
Final amplifier shield (front)
Center shield
Low-pass filter housing
Escutcheon
Cover
Bottom plate
Chassis
MISCELLANEOUS
O-Ll ima meter
Tube shield
Tube shield
Ceramic plate cap
Ceramic standoff terminal
Pitot light socket
Standoff insulator
Pilot lamp
Pilot lamp jewel (red)
Foot (Polyethylene, gray)
AC line cord
Strain relief
Fuse holder
3 amp fuse, 3AG
1/4" grommet
Electrolytic mounting wafer
L/2'' grommet
SHAFTS, BUSHINGS, KNOBS
1/4'' diameter shaft
3/8"
panel
bushing
for
1/4"
shaft
(with
hex
nut}
Shaft coupler
Knobs, small
Knobs, large
HARDWARE
4-40 x 1/4” machine screw
6-32 x 1/4" machine screw
8-32 % 3/8" machine screw
meee oe
ee whe eee ee ee Ne Se ee
BUD oe
34
15
Quantity |
4
2 |
23
ae
lL 4
1
1
l
boy
2
1
l
4
1

Part No. Circuit Designation Description Quantity
22-149 4-40 x 7/8" machine screw 1
22-66 2-56 x 1/Z" machine screw 5
22-146 6-32 x 3/16" machine screw 5
22~ 144 6-32 x 3-3/4" bolt 1
22-116 #4 x 1/4" sheet metal screw 10
22-152 #8 x 3/8" sheet metal screw (nickel plated) 4
22-92 4-40 x 3/8" machine screw 1
22-27 8-32 x 1/4" machine screw 4
22-93 #68 x 3/8" sheet metal screw (hex head) 20
22-16 #4 internal tooth lockwasher 36
22-28 #8 internal tooth lockwasher 1zZ
22-122 #2 internal tooth lockwasher 5
22-142
#8
flat
steel
washer
2
22-154 #6 split lockwasher 3
22-2) 3/8" internal tooth lockwasher 7
22-143 Fiber washer 1
22-17 #6 internal tooth lockwasher 28
22-140 Cork washer 3
22-14 4-40 hex nut 36
22-46 2-56 hex nut 5
22-26 8-32 hex nut 8
22-15 6-32 hex nut 28
22-145 5/16" hex nut (for C18) 1
22-20 3/8" hex nut &
20-24 #6 solder lug i
22-151 6-32 x 7/16" spade lug 8
20-100 Double solder lug z
22-106 Solder lug 4
22-141 Thumbscrew, 8-32 x 1/2" 1
20-83 #8 solder lug 1
22-156 6-32 x 1/4" spade lug 2
WIRE AND SLEEVING
21-15 #22 Black lead 24"
21-11 #22 Yellow lead 60"
21-69 fee Gray lead 561
21-25 #22 Red/White lead 198"
21-13 #22 White lead TZ
21-14 #22 Blue lead 69"
21-87 #18 Yellow lead 60"
21-86 #20 Bare wire 4g"
21-18 Yellow, cotton varnished sleeving 30"
21-19 Black, vinyl sleeving 12"
21-868 #22 Red lead, heavy insulation 30"
20-1044 Solder, 15-f£, roll !
NOTE, To test the transmitter after completion, it wil] be necessary to construct a dummy load. You
will need a coaxial connector (PiL-259 or equivalent), a 75 watt light buib, and about 12 inches
of #16 bare wire, You may wish to purchase these parts now to avoid delay after construction,
IMPORTANT: For convenience in packing, the AC power transformer has been temporarily mounted
on the main chassis, Please remove this transformer before beginning construction, Instructions for
its installation will be provided at the propar time,

Part No,
13-272
13-273
13-217
13-267
13-215
13-72
13-269
13-1
13-50
12_A0
ae EG
13-51
13-280
13-45
13-4
13-3
13-226
13-75
13-118
13-99
13-19
13-281
13-144
11-57
11-58
Circuit Designation
na
aA
R9, 15, 20
Rll
R18, 19
R14
R17
R24
R23
R27
"wt
R13
Rl2
RLO
R22
RS
R21
PARTS LIST
Description
RESISTORS
TEN shms &
25K ohms 30 watt, wire-~wound (center-tapped}
15K ohms 2 watt (brown-green-orange-silver)
12K ohms 2 watt (brown-red-orange-silver)
1.5K ohms 2 watt (brown-green-red-silver)
10K ohms 2 watt (brown-black-orange-silver)
6,8K ohms 2 watt (blue-gray-red-silver)
100K ohms 1/2 watt (brown-black-yellow-silver)
33K ohms 1/2 watt (orange-orange -orange -silver)
10K vlims 1/2 wait (brown-biack-orange -silver)
4,7K ohma 1/2 watt (yellow-viclet-red-silver)
18K ohms 1 watt (brown-gray-orange-silver)
470K ohms 1/2 watt (yellow-violet-yellow-silyer)
47K ohms 1/2 watt (yellow-violet-orange-silver)
2,2 megohm 1/2 watt (red-red-preen-silver)
33K ohms 1 watt (orange -orange-orange-silvyer)
1.5 megohm 1/2 watt (brown-green-green-silyer}
330 ohms 1/2 watt (orange-orange-brawn-silver}j
10 ohms 1/2 watt (brown-black-black-silver)
2.2K ohms 1/2 watt (red-red-red-silver)
620 ohms 1/2 watt 5% (blue-red-brown-gold)
22 megohm 1/2 watt (red-red-blue-silver)
25K ohms 4 watt wire-wound (DRIVE LEVEL)
100K ohms 1/4 watt potentiometer
Oe |
tt 22 We
Quantity
Se ee NO ee oe eee

SPECIFICATIONS
OUTPUT
LOAD
IMPEDANCE
,.....0eeeeeues
OUTPUT
COUPLING
......c
cesses
acvenrens
BAND
COVERAGE
Joss
s
ccc
e
nee
cree
ne
eee
OPERATION
2...
cece
cee
eee
e
weet
tte
teeaaenee
FRONT
PANEL
CONTROLS...,..4..ese0eseeee
TUBE
COMPLEMENT
...-vceessawanacsvnnes
POWER REQUIREMENTS...
DIMENSIONS ....-00---0206:
SHIPPING WEIGHT........
THE
LAFAYETTE
ELECTRONICS
MANUFACTURING
DESIGN
CHANGES,
ADDITIONS,
OR
MODIFICATIONS
eee ener eee tere ae
Pi-network (coaxial)
80, 40, 20, 15 and 10 meters
CRYSTAL or external VFO
METER switch
MODE switch
DRIVE LEVEL
CRYSTAL switch
DRIVE TUNE
BAND switch
FINAL TUNING
FINAL LOADING
L- 6CL6, Crystal Oscillator
1- 6CL46, Driver
1L- L2AX7/ECC83, Speech Amplifier
1- 6DE7, Modulator
1- 6146, Final Amplifier
117
volts
50/60
cycles
AC,
225
watts
Width - 13-1/8"
Depth - 12" (incl, knobs}
Height-
6-1/4"
(incl,
rubber
feet)
28 lbs,
ANY
OBLIGATION
TO
INCORPORATE
THEM
IN
PRODUCTS
PREVIOUSLY
SOLD.
ENTIRE
CONTENTS
COPYRIGHT
1962
BY
LAFAYETTE
ELECTRONICS
Printed in U,S, A.
CORP,
RESERVES
THE
RIGHT
TO
MAKE
TO
ITS
PRODUCTS
WITHOUT
INCURRING
MANUFACTURING
CORP.
IM-321
6/62
1.3M/K

RESISTORS CAPACITORS AND DIODES
—- -_ 1 OE S-iC
1/2 WATT RESISTOR 1 WATT RESISTOR 2 WATT RESISTOR DIODE
8 WATT RESISTOR 30 WATT RESISTOR CERAMIC DISC
CAPACITOR
MOLDED FEED THROUGH MOLDED MICA
ELECTROLYTIC GAPACITOR TUBULAR CAPACITOR CAPACITOR CAPACITOR
COILS AND CHOKES
i/o 7
Wa | || Lop == —op—
DRIVER
PLATE
COIL
OSCILLATOR
COIL
RF
CHOKE
(23-33) (23-32) (23-37)
-————~ LOW PASS FILTER COILS —_—--_
—am— _ fi i
PARASITIC
CHOKE (23-40) (23-41) (23-42) RF CHOKE
(23-43) (23-38)
20-74 20-305 20-314 20-47 29-313 20-312

HARDWARE
om = . mat
s, , b.., wy
2-56 x 1/2" #2 2-56 5/16" 3/9"
SCREW LOCK WASHER HEX NUT HEX NUT HEX NUT
{22-66} (22-122) (22-46) (22-145) (22-20)
4-40 x 1/4" 4-40 x 3/8"! 4-40 x 7/8!" #4 4-40
SCREW SCREW SCREW LOGK WASHER HEX NUT
(22-10) (22-92) (22-149) (22-16) (22-14)
Llp Lpwenre ry (F%) {O)
aad uw Q? ey pod
6-32 x 3/16" 6-32 x Ljau #6 6-32
SCREW SCREW SPLIT LOCKWASHER LOCK WASHER HEX NUT
(22-146) (22-11) (22-154) (22-17) (22-15)
8-32 x 1/4" 9-32 x 3/6" #8x1/2" 9-32
SCREW SCREW LOC K WASHER FLAT WASHER HEX NUT
(22-27) (22-42) (22-28) (22-142) (22-26)
Chae Say as (o}era fo Demanaa
#4 x 1/4" #8 x 3/8" #8 x 3/8" 6-32 x 1/4" 6-32 x 7/16"
S. M, SCREW 5. M. SCREW S. M, SCREW SPADE LUG SPADE LUG
(22-116) (22-152) (22-93) (22-156) (22-151)
SOLDER LUG
(22~ 106)
oa
ai"
#6
SOLDER LUG
(20-24)
#8
SOLDER LUG
(20-83)
DOUBLE
SOLDER LUG
(20-100)
TUBE SHIELD
(20-304) (20-173)
2)
SHAFT COUPLER POTENTIOMETER
(11-58)
NOVAL SOCKET OCTAL SOCKET
(49-30) (19-46)
CERAMIC STANDOFF STANDOFF
TERMINAL INSULATORS
(20-308) (20-309;
TUBE SHIELD
MISCELLANEOUS
l f2" 1j4"
GROMMET GROMMET
(20-33) (20-210)
PILOT LIGHT COAX
SOCKET CONNECTOR
(20-310) (20-282)
LE
XTAL SOCKET
(19-45)
es
STRAIN RELIEF
{20-215}
CORK WASHER
(22-140)
FIBER WASHER
(22-143)
iE
FUSE HOLDER
(20-175)
MOUNTING WAFER
(20-75)
SINGLE JACK
{19-3}
PANEL BUSHING
(22-90)

TOOLS YOU WILL NEED
Just a few standard tools are all you will need to successfully assemble this kit. You should use a
syoall iron {about 25 to 50 watts) for soldering, <A pair of long-nose pliers, a pair of diagonal or side -
cutting pliers, two screwdrivers (1/4" and 1/8" blade) and a small adjustable wrench complete your
tool requirements,
STEP BY STEP INSTRUCTIONS
The instructions which follow have been carefully planned and arranged in the most logical and practi-
cal sequence possible, Skilled engineers and technical writers have prepared these instructions while
actually assembling samples of this kit, We are certain we have provided you with the best and fastest
method of assembling your kit,
EACH INSTRUCTIONAL STEP SHOULD BE READ AND THOROUGHLY UNDERSTOOD BEFORE IT
IS PERFORMED, In this way, errors will be avoided, Check off each step in the check space { }
provided, In this way you will avoid omitting any steps. You might also use a colored pencil to crosa
st ze el leasnal as oc
out cach lead and component on the wiring pictori
ls ter insertion
Assembly and wiring pictorials have been provided to assist you in following the atep-by-atep instruc-
tions, All components have been assigned letter and/or number designations, Those components which
also appear on the schematic diagram have generally been assigned the sare designations on the wir-
ing pictorials, Other components, such as terminal strips, solder lugs, etc., have been assigned let-
ter and/or number designations,
The instructions tell you when to solder and when not to solder a connection, When you see the ab-
breviation "NS" (Nu Solder} after or during a step, simply wrap or crimp the lead to the terminal and
proceed to the next step, When the final lead is connected to thie terminal the abbreviation 'S" (Solder)
will follow, The figure which appears with this solder instruction will indicate the number of leads
which should be connected to that terminal or lug when the solder instruction ie given, Thus, if a step
reads, "Connect the orange lead to TP-2 lug 1 (S-3)", it meane that there will be three leads connected
to this lug at the tirne it ia soldered.
NOTES ON WIRING
Each kit is supplied with more than enough insulated lead for complete wiring. A length of insulated
lead, unless otherwise specified, should have about 1/4" of inswlation removed or "stripped! from
each end, Excessive wire exposure increases the possibility of shorts to nearby wiring or terminals,
Use a razor blade or sharp knife to cut off the insulation, during this operation, be sure not to cut into
the wire itself, The length to which each lead is to be cut is specified in the step-by-step instructiona,
and allowance has been made for the removal of the insulation from each end, The lead supplied is
solid
wire,
but
some
of
the
transformer
leads‘are
etranded;
the
latter
should
be
tinned
(coated
with
solder} before connecting to the specified point, To prepare stranded leads, remove a 1/4" length of
insulation from the end of the lead, twist all the strands together with your fingers, and tin the end,
To connect a lead to a lug, put about three-quarters of the bared end of the lead through the hole in the
lug, and then, using the long-nose pliers, wrap the wire around the lug, The lengtha to which compo-
nent leads are to be cut are also specified in the instructions, For example, if you are instructed to
cut each lead of a capacitor to 1", then the prepared cormponent should have a 1" length of wire,on each
side.
NOTES ON SOLDERING
The importance of good soldering technique in the construction of kits cannot be over-emphasized. Good
solder joints are essential if you are to realize the quality and stability of performance that has been
engineered into this unit, If you are inexperienced in soldering, we suggest that you spend a little time
practicing
with
pieces
of
scrap
wire
and
an
old
tube
socket
or
terminal
strip
before
attempting
to
do
any soldering on your kit, The purpose of soldering an electrical connection is to provide a permanent
electrical bond between the wires and terminals to be joined, This prevents the formation of corrosion
which
insulates
or
produces
unwanted
resistance
between
the
joined
parts,
It
is
not
at
all
difficult
to
make a good solder connection that will provide the required electrical bond if you will simply observe
a few basic rules for good soldering.

1, Use only good quality, rosin-core solder made apecifically for radio and television use; a
good cornposition ia 60 per cent tin and 40 per cent lead (usually indicated as 60/40}, Acid
core solder or paste flux must NOT, under any circumstances, be used, as the corrosive
effects of these materials will cause much damage to the circuit components,
CAUTION
THE USE OF ACID CORE SOLDER OR PASTE FLUX ON THIS KIT OR ANY PORTION THEREOF
AUTOMATICALLY VOIDS OUR WARRANTY COVERAGE,
2, Use a good soldering iron, 25-50 watts, The tip of the iron must be kept clean and well tin-
ned, in accordance with the instructions of the soldering iron manufacturer, to obtain con-
sistently good connections, The tip should present a bright appearance and be free of excess
solder, An old rag or a pad of steel wool may be used to wipe the hot tip clean occasionaliy
during use,
3, Be sure leads and terminals to be joined are clean and free of wax or corrosion before sol-
dering, The solder will not adhere properly to the joint if the leads and terminals are dirty
or corroded, and will uaually result in a "cold" or high resistance connection,
4, A good mechanical connection should always be made before soldering, by crimping the leads
on the terminals with your pliers, Do not rely on solder alone for physical strength, Strand-
ed leads should always be tinned with solder before being connected,
5, To solder properly, apply the iron to the joint for a few seconds; then apply the solder and
hold the iron on the connection until the solder flows freely, The solder must flow complete-
ly over the connection, Simply melting drops of solder onto the connection will not produce
the desired results, but will result in a "cold" solder connection, This presents a dull and
pitted or "grainy" appearance, A good connection will have a smooth and shiny appearance,
Remember, the joint itself must be heated sufficiently to melt solder before the solder will
flow smoothly and freely in and around the connection; however, you must be careful not to
apply heat too long, Excessive heat from the iron may damage components and insulation on
wires connected to the joint, When soldering a joint having a small cornponent connected to
it (a 1/2 watt resistor, for example), the cormponent may be protected from excessive heat
frorn the iron by grasping the lead between the joint and the component with long-nose pliers,
The pliers will then conduct most of the heat away from the component, preventing overheat-
ing. Do not use too much solder when making a connection, Use only enough to completely
cover all leads and to fill lug or terminal holes. Excessive use of solder may result in the
formation of solder "bridges" or shorts between adjacent terminals or nearby wiring, par-
ticularly on tube socketa and switch terminals, Aliso, solder may flow into the switch con-
tacts, destroying switch action,
WIRING PROCEDURE
For clarity, the illustrations showing the wiring of the unit have been divided into seyeral wiring pic-
terials, Each one illustrates a group of components and/or leads which are not duplicated on the other
pictorials, The instructions will refer you to the appropriate pictorial in allcases, When you have
completed the wiring shown in one pictorial, you will be referred to another pictorial which will illua-
trate the next stage of wiring only, For an overall view of a completed unit, photographic views have
been included, Although all pictoriala are reproduced in the pages of the manual, certain ones have
been selected for reproduction on large inserts, These may be attached to the wall above your work
bench and referred to during wiring.
To assist you in assembling this kit, mechanical assernbly views are shown which supplement the step-
by-step instructions, In order to clarify the drawings, not all the mounting hardware is shown, The
amount of hardware used to assemble each part is specified in the step-by-step instructions,

IMPORTANT:
— ra:
MECHANICAL ASSEMBLY
The
AC
power
transformer
must
be
removed
from
the
chassis
before
beginning
construction,
TO PICTORIAL 1
NOTE:
4-40
hardware
(2)
means
that
you
should
use
two
4-40
x
1/4"
screws,
two
#4
lockwashera
and
16,
17,
ig,
19,
(i)
‘
(~
cs
two
4-40
hex
nuts.
Unless
otherwise
directed,
always
place
the
washer
directly
beneath
the
nut
when
installing
hardware,
Monnt
V4
tube
socket
(19-30)
from
the
topside
of
the
chasaia,
using
4-40
hardware
(2).
Orient
the
blank
space
between
pins
as
shown,
Mount
a
5-lug
terminal
post
(420-312)
next
to
V4
socket,
using
4-40
hardware
(2},
Mount
V5
tube
socket
(19-30)
and
a
solder
lug
(22-106),
using
4-40
hardware
(2),
Orient
socket
pins
aa
shown,
Mount
V2
tube
socket
(19-30)
and
a
solder
lug
(42-106)
as
shown,
using
4-40
hardware
(2).
Mount
V1
tube
aocket
(19-30)
and
a
solder
lug
(22~106)
as
shown,
using
4-40
hardware
(2).
Mount V3 tube gocket
as Shown,
19-46),
using
4-40
hardware
(4),
Orient
the
socket
with
the
key-way
Mount
the
accessory
socket
(19-46)
on
the
reay
apron
of
the
chasaia
{from
the
inside),
using
4-40
hardware
(2),
Note
the
position
of
the
key-way,
Mount
a
3-lug
terminal
post
(20-47)
on
the
rear
apron
of
the
chassis
as
shown,
using
4-40
hardware
(1),
Mount
a
phono
jack
(19-3)
on
the
rear
apron
of
the
chassis
(iz0m
the
inside},
using
4-40
hard-
ware
(2),
Orient
as
shown,
Monnt
a
4-lug
terminal
post
(20-22)
next
to
V1
socket,
using
4-40
hardware
(1).
Mount
a
3-lug
terminal
post
(20-23)
next
to
the
large
cut-out
for
the
power
transformer,
Use
4-40
hardware
(1).
Mount
a
3-lug
terminal
poat
(20-314)
to
the
right
of
VZ
socket,
using
4-40
hardware
(ly.
Care.
fully
observe
the
position
in
which
the
post
is
installed
--
be
sure
to
use
the
wight
mounting
bole
in
the
chassia,
Mount
a
3-lug
terminal
post
(20-305)
near
V2
socket
as
shown,
using
4-40
hardware
(1).
Mount
a
5-lug
terminal
post
(20-313)
to
the
left
of
V2
socket
aa
shown,
using
4-40
hardware
(1)
Select
the
closed-circuit
jack
(19-25),
Remoye
the
hex
nut
and
flat
washer.
Install
the
jack
in
the
lower
hole
in
the
front
apron,
orienting
the
aolder
lugs
as
shown.
Place
the
flat
washer
Mount
the
DRIVE
LEVEL
control
(12-57)
next
to
the
jack,
using
a
3/8"
lockwasher
on
the
inside
of
the
chassia
and
a
3/8"
hex
nut
on
the
outside,
Do
not
tighten
excessively
--
the
nut
must
later
be
removed
in
order
to
monnt
the
eecutcheon,
Mount
the
MODE
switch
(14-46)
in
the
position
shown,
using
a
3/8"
lockwasher
and
3/8"
hex
nut
to
secure
it,
Make
sure
the
locating
lug
on
the
face
of
the
awitch
entera
the
amall
hole
provided
for
it
in
the
chassia,
De
not
tighten
the
hex
nut
excessively
at
this
time.
Install
the
level
control
(11-58)
between
V4
and
V5
sockets
as
shown.
To
install
it,
line
up
the
locating
lugs
on
the
face
of
the
control
with
the
small
holes
provided
in
the
chasgia
and
press
control
firmly
into
place
against
the
chassis,
When
correctly
installed,
two
epring
taba
will
snap
open
on
the
other
aide,
holding
the
contro]
securely
in
place
as
shown
in
Pictorial
4.
Mount
a
4-lug
terminal
post
(20-311)
near
the
large
cut-out
for the
power
transformer.
Use
4-40
hardware
(1),

20, 'K] Install a 1/2" grommet (20-33) at hole A,
21, h) Inatall two 1/4" grommets (20-410) at holes B and C.
SOLDER LUG
(22 -106}
11-58) Se
(19-30) a TERMINAL POST
(a) (20-3199
GROMMET Aigo?
2033) JOO Yoo,
© TERMINAL POST
(20-22) (es)
Oo
o o
; ©) TERMINAL POST
| , (p (20-3)
TERMINAL POST a} TERMINAL POST i
{20-3133 a 120-314}
oO
TER Al POST OSCiL ATOR ELECTROUYTE: CAPACITOR
re 20-305) i re) 2-193)
POWER TRANSFORMER
(8-43)
PICTORIAL 1
REFER TO PICTORIAL 2
22, (\)_ Select the following parts: Two Stand-off Insulatore (20-309)
Two Dual Solder Luge (20-100)
Two Cork Washers (22-140)
Four 8-32 x 1/4"! Screws
Four #8 Lockwashers
One #8 Solder Lug

2.
24, t~]
At
hole
D,
install
one
stand-off
insulator,
dual
solder
lug,
cork
washer,
and
one
#8
solder
lug,
using
two
8-32
x
1/4"
screws
and
two
#8
lockwashers
to
secure
the
complete
assembly
as
shown,
Tighten
screws
fixmly,
but
not
excessively
or
the
insulators
may
be
damaged,
At
hole
E,
install
one
stand-off
insulator,
dual
solder
lug
and
cork
washer,
using
two
8-32
x
1/4"!
screws
and
two
#8
lockwashers
to
secure
the
cornplete
assembly,
Make
sure
that
both
of
the
dual
solder
lugs
and
the
#8
solder
lug
are
oriented
ag
shown.
Install
the
electrolytic
mounting
wafer
(20-75)
and
fuseholder
(20-175)
as
shown,
On
one
side,
use
a
4-40
x
3/8"
screw
(attach
the
fuseholder
to
this
side),
a
#4
lockwasher
and
4-40
hex
nut,
On
the
other
side,
use
a
4-46
x
1/4"
screw,
#4
lockwasher
and
4-40
hex
nut,
Be
sure
to
orient
the
mounting
wafer
as
shown,
REFER TO PICTORIALS 1 and Zz
25,
OQ
Install
the
10-10
yf
150
volt
insulated
electrolytic
capacitor
(12-220)
on
the
mounting
wafer,
2b, (J
27. NQ
Orient
the
solder
lugs
(by
means
of
the
sqnare
and
triangular
cut-outs
in
the
base)
as
shown
in
Pictorials
1
and
2,
To
mount
securely,
hold
the
capacitor
firmly
against
the
wafer
(with
the
mounting
lugs
passed
through
the
slots)
and
then
twist
each
of
the
three
mounting
lugs
(not
solder
lugs)
1/4
turn,
using
pliers.
Install
a
40-40
pf
450
volt
electrolytic
capacitor
(12-
193)
to
the
left
of
the
large
cut-out
in
the
chassis
as
shown
in
Pictorial
1,
Orient
the
half-moon
and
triangular
cut-outs
in
the
base
as
shown,
Use
the
same
general
mounting
procedure
as
that
given
in
the
previous
atep,
twisting
each
of
the
four
mounting
lugs
1/4
turn,
Install
the
feed-through
capacitor
{12-205}
from
the
top
of
the
chassis
as
shown
in
Pictorial
2;
using
the
special
5/16"!
silver-plated
nut
provided.
To
install
into
the
hole
in
the
chassia,
rock
the
capacitor
from
side
to
side
slightly,
exerting
a
downward
pressure
at
the
same
time,
Se-
cure
tightly
frorn
the
underside
of
the
chassis
by
means
of
the
special
5/16't
nut,
When
tight-
cuing
the
nut,
make
sure
you
do
not
damage
the
ceramic
portion
of
the
capacitor
(ceramic
material
cracks
quite
easily),
REFER TO PICTORIAL 2
28. (°)
29, bo)
30, ( }
31. 04
32, ( )
33, t)
Mount
the
RF
choke
(23-39)
and
cork
washer
(22-140)
as
shown,
using
a
6-32
x
1/4"
screw
and
#5
lockwasher,
Weave
the
screw
fairly
loose
in
order
to
permit
you
to
rotate
the
choke
as
necessary
in
the
next
step,
Referring
to
detail
A,
bend
the
terminating
lead
of
the
feed-through
capacitor
down
in
the
di-
rection
of
the
hole
in
the
lower
lug
of
the
choke,
Twist
the
choke
in
the
direction
of
the
arrow,
so
that
the
capacitor
lead
passes
through
the
hole,
When
most
of
the
lead
has
passed
through,
bend
it
upward,
Tighten
the
screw
securing
the
choke
(do
not
tightan
exce
asively
or
damage
to
the
cerarnic
portion
of
the
choke
may
result,
Select
the
following
parte:
6-32
x
3-3/4"
bolt
(22-144),
fiber
washer
(22-
143},
30
watt
center-
tapped
25K
resistor
(13-273),
4-lug
terminal
post
(20-22),
#6
lockwasher
and
6-32
hex
nut,
In-
atell thees pavts in the secuence shown in ictorisi 2 maki
siait
these
parts
in
the
sequéncc
shown
in
Pictezial
2,
making
sure
the
30
watt
resistor
and
terminal
post
are
oriented
as
illustrated,
Do
not
tighten
bolt
excessively
or
damage
to
the
re-
sistor
may
result
Select
the
front
section
of
the
final
amplifier
shield
(10-147).
Attach
two
of
the
longer
spade
lugs
(22-151)
to
the
bottorn
edge
of
one
side
of
the
shield
as
shown
(detail
By,
using
a
6-32
x
1/4"
screw,
#6
lockwasher
and
6-32
hex
nut
to
secure
each
spade
lug,
Install
the
variable
tuning
capacitor
(12-198)
on
the
shield
as
shown,
using
a
3/8"
lockwasher
and
3/8"
hex
nut
to
secure
the
capacitor,
Keep
the
plates
fully
meshed
at
all
times,
Position
the
capacitor
so
that
ite
lower
edge
lies
parallel
to
the
lower
edge
of
the
shield,
Tighten
se-
curely
in
this
position,
Install
the
shield
on
the
chassis,
allowing
the
spade
lugs
to
pasa
through
the
holes
in
the
chas-
sis.
Secure
frorn
the
underside
of
the
chassis
by
means
of
two
#6
lockwashers
and
two
6-32
hex
nuta,

REFER TO PICTORIAL 1
34, {
} Install the power transformer (15-43) in the large cut-out in the chassis, Mount the trans-
former in the position which allows the two black leads to reach the lower two lugs of the
nearby terminal post on the rear apron. Secure the transformer firmly, using four §-32 hex
nuts and four #8 lockwashers,
35, By } Install the oacillator coil (23-32) in the hole near V1, To install, press the coil firmly into
place, allowing the spring tabs to snap open on the other side of the chassis. Be sure to orient
the coil with the terminal lugs in the positions shown, the terminal with a red dot located at
the left,
3/8 NUT a “a FINAL AMPLIFIER SHIELD -FRONT SECTION
a r 10-147)
capacitor Og S°
iz-98) &
oP e-a2 x 1/4
cero SCREW
12-220)
(22-27)
4-40 43/6
ScREw
(22-92)
&-32 x 14
SCREW
(22-11)
ER
wo 6
FIBER WASHER
(22-143)
"at
SPADE LUG
(22-181)
DETAIL 8
PICTORIAL 2

14
UNDERCHASSIS WIRING — I
LEAD DRESS
it
is
recommended
that
the
wiring
dress
and
parts
layout
shown
in
the
pictoriale
be
faithfully
followed,
The
lead
lengths
specified
in
the
instructions
were
carefully
determined
through
the
construction
of
a
series
of
laboratory
models
and
will
enable
you
to
follow
the
same
arrangement
without
any
difficulty,
REFER TO PICTORIAL 3
CAUTION:
Two
shield
brackets
will
eventually
be
installed
on
either
side
of
socket
V2,
The
areas
which
will
be
occupied
by
these
brackets
have
been
shown
in
Pictorial
3
by
means
of
broken
lines,
Be
sure
to
keep
all
leads
outside
of
these
areas,
dressing
the
leads
as
shown,
It
will
now
be
necessary
to
connect
the
free
ends
of
the
leads
from
the
power
transformer
Tl
to
various
terminals
on
the
underside
of
the
chassis,
All
leads
have
been
pre-cut
to
the
proper
length
and
should
reach
their
assigned
terminals
without
difficulty,
If
you
find
that
one
of
the
leads
is
short
however,
tug
gently
on
it
with
a
pair
of
long-nose
pliere
--
some
of
the
lead
may
be
contained
within
the
bell
casing
of
the
transformer.
36,
(~)
Connect
one
of
the
BLACK
transformer
leads
to
TP-1
lug
1
(NS).
37,
(
)
Connect
the
other
BLACK
transformer
lead
to
TP-1
lug
2
{NS}.
38,
(
}
Connect
the
WHITE
transformer
lead
to
C33
lug
2
(8-1).
-
39.
(
)
Connect
the
longer
of
the
two
RED
leads
to
C36
lug
A
(NS).
40,
()
Connect
the
shorter
RED
lead
to
TP-Z
lug
|
(NS),
41,
(\j)
Connect
the
WHITE/
BLACK
transformer
lead
to
TP-7
lug
4
(NS).
42,
(
°°}
Connect
the
FELLOW
transformer
lead
to
J-1
lug
7
(5-1).
43,
(~}
Connect
the
BLUE
transformer
lead
to
TP-2
lug
3
(NS).
44,
(4
Connect
both
the
GREEN/YELLOW
and
BLUE/YELLOW
transformer
leads
to
TP-2
lug
2
(5-2).
45,
(4,
At
socket
V4,
bend
lugs
4,
5
and
8
against
the
center
post
as
shown,
46,
(\)
Cut
a
2"
length
of
BLACK
lead,
Connect
it
from
TP-9
lug
5
(NS)
to
the
center
post
of
V4
socket
(NS).
47,
(\)
Cut
a
1-3/4"
length
of
BLACK
lead,
Connect
it
from
R21
lug
3
(NS)
to
the
centex
post
of
V4
socket,
Solder
all
connections
at
the
center
post,
using
sufficient
heat
and
solder
to
ensure
a
good
electrical
connection,
48,
(~
|
At
socket
V5,
bend
lug
§
against
the
center
post.
Cut
a
2"
length
of
hare
wire,
Using
this
wire,
make
a
connection
from
the
center
post
of
socket
V5
to
SL-1,
passing
the
wire
through
lug
4
of
V5
socket
as
shown,
Cut
off
excess
wire,
then
solder
the
center
post
and
lug
4
of
V5
socket,
Do
not
solder
SL-1.
NOTE:
Two
sizes
of
yellow
interconnecting
lead
have
been
supplied
with
thia
kit,
One
ia
a
standard
#22
lead,
while
the
other
is
a
heavier
#18
lead,
Use
the
heavier
#18
lead
only
when
specifically
instructed
to
do
so,
In
all
other
cases,
use
the
standard
aize
#22
lead,
49,
(4,
Cut
a
3-1/2"
length
of
YELLOW
lead,
Connect
it
from
V4
lug
9
(S-1)
to
V5
lug
5
(NS}.
50,
(¢
}
Cutan
8"
length
of
FELLOW
lead,
Connect
one
end
to
V5
lug
5
(NS).
Feed
the
free
end
through
grommet
hole
A
and
leave
temporarily
disconnected,
51,
{
A.
Cut
a
8"
length
of
YELLOW
lead.
Connect
it
from
V5
lug
5
(8-3)
to
TP-2
lug
3
(NS5}.
52,
(™
Cut
each
lead
of
a
0,01
pf
600
yolt
capacitor
C32
to
3/4",
Connect
the
end
with
the
outside
foil
line
to
J-1
Lug
Gi
(S-1},
Connect
the
other
lead
to
TP-1
lug
i
(NS).