Specifications

Two printed circuit plates are soldered to the dual potentiometers.
One printed
circuit plate, PC 1 gets
connected to the potentiometers,
R31 and R33 nearest
the front apron.
The other printed circuit plate,
Pe2 gets connected to the
potentiometers R30 and R32
mounted on the rear of
the front potentiometers.
To keep the drawings clear
and simple, the first plate,
PC 1 is mounted and
wired in first, with the associated connections.
The rear potentiometer is
shown dotted in.
Below this drawing, the second plate, PC2
is mounted and wired in the circuit
with its associated connections. In this
drawing, the fr
ont potentiometer
, R31
is shown dotted in. All
the connections made previously for
PC 1 are not shown
in this drawing to avoid confusion.
We now wire the circuit
using the first printed plate, PCl,
using the upper
drawing.
1. ( Fig. 5.
Strip the outer insulation back 1/2" on one end of a
811
piece of single conductor shielded cable. Twist
the shield strands together and
cut off. Strip the inner insulation
back 1/4"
, Connect this end to R33-
4 (C).
...
On the other end of the same piece of cable, strip the outer
insulation back
... 3/4"
. Twist the shield strands together. Strip the inner insulation back 1/4"
Push this end of the cable through hole "
T" to the bottom of the
chassis.
2. (\J
Fig. 5. Connect one end of a 711
piece of brown wire to R33-
6 (C).
Push the other end through ho I e liT II .
6. (IA
Fig. 5. Connect one end of a 10" piece of grey wire to the swi~ch
S4-9 (S l)which is
mounted on the rear of the dual treble control potentiometers.
Connect one end of a 14" piece of black wire to S4-
10 (S 1). Twist the two
leads together and push the unsoldered end through hole "
V" to the bottom of
the chassis.
3. (v) Fig. 5. On the printed circuit
plate)' Pel
, cut leads
112
#3 and #6
to 1/2"
. Cut leads
111
#5 and #7 to 2" . Cutdead #4 to
1 1/2". Connect lead
*6 to R31-
3 (C), lead #3 to R31-
2 (C) and lead #2 to R31- 1 (S1). Cover leads
#1 and #7 each with a 1 3/4"
piece of spaghetti. Connect lead #1 to R33-
6 (S2)
and lead
117
to R33-
4 (S2). Cover lead #4
with a 1 1/4" piece of
spaghetti
and connect to R33-
5 (Sl). Cover lead
#5 with a 1 3/4"
piece of spaghetti
and conflect to TB 16-
1 (C).
4. (Ii Fig. 5. Cut both leads on a
. 0012mfd (1. 2K or
1200mmf) disc capaci-
tor, C19)' to 1/211 . Connect from R31-
2 (S2) to R31-3 (S2).
The wiring of the front potentiometers and the printed
circuit plate Pe 1 , has
now been completed.
Referring to the set below the main drawing, wire the
rear sectjon of the dual
concentric potentiometer, with the printed circuit
plate, !1t2, as follows:
7.
Fig. 5.
Cut the leads #2 #3 and
116
on printed circuit plate PC2, to
1/2"
. On
the same printed circuit plate Pe2,
cut leads
111
and #7 to 2 1/4"
lead #5 to 1 1/4" and lead #4 to 1 3/4"
. Connect lead #6 to R30-3 (C), lead
#3 to R30-2 (C) and lead #2 to R30- 1 (S 1). Cover leads #1 and #7 each with
a 2" piece of spaghetti. Connect lead#7toR32-
1(C)and lead #lto R32-3(C).
Cover lead #4 with a
1 1/2" piece of spaghetti and
connect to R32-
2 (Sl).
Cover Ijbd #5 with a 1" piece of spaghetti and connect to TB 16-
2 (S2).
8. ('YFig. 5. Cut both leads on a . 0012mfd (1. 2K or
1200mmf) disc capaci-
tor, C20, to 1/2"
. Connect from R30-3 (S2) to R30-
2 (S2).
9. (v) Fig. 5.
Connect one end of an 8" piece of grey wire to
TB 16-
1 (S2).
Push the/other end through hole "
T" to the bottom of the chassis.
10. (0 lig. 5. Connect one end of a 4" pieceof yellow wire to R32-
3 (S2).
Push th
1other end through hole "
U" to the bottom of the chassis.
11.
(.1)- Fig. 5.
Strip the outer insulation back 1/2"
on one end of a 5"
piece of single conductor shielded cable. Twist the shield
strands together and
cut off. Strip the inner insulation
back 1/4"
Connect this end to R32-
1 (S2).
On the other end of the
same piece of cable, strip the
outer insulation back
3/4" . Twist the shield strands together. Strip the inner insulation
back 1/4-
Push this end of the cable
through hole "
U" to the bottom of the
chassis.
5. (v)
Fig. 5. Connect one end of a 5 1/2" piece of
green wire to TB 16-
(C)
Push the other end through hole "
T" to the bottom of the chassis.