Step 1
– With a dual ganged 500K audio taper potentiometer, bend the two outside lugs
together to form a single terminal (photo 11h). This will be identified as “1”.
Step 2
– Install a 20AWG wire 5” long on this folded terminal 1.
Step 3
– Install two 20AWG wires 5” long, one wire on terminal 2 and the
other wire on terminal 4 (photo 11i).
Step 4
– With a permanent marker, make a mark near the opposite end
of the wire attached to terminal 4. Twist these two wires together.
Step 5
– Install two 20AWG wires 5” long, one wire on terminal 3 and the
other wire on terminal 5 (photo 11i).
Step 6
– With a permanent marker, make a mark near the opposite end
of the wire attached to terminal 5. These marks will assist in identifying
the wires. Twist these two wires together (photo 11j).
Step 7
– Remove one of the vibrato channel input jacks
and install this dual ganged pot in the chassis at this point
(photo 11k). Refer to following page for removal of input jack.
Step 8
– Remove the jumper that connects T40 and T38. As well,
remove the jumper that connects T46 and T48
Step 9
– Neatly run the wire from the pot terminal 1 (folded terminals)
over to turret T44 of the turret board. Cut to length, strip and tin the end and solder to the
ground buss at this point.
Step 10
– Neatly run the two wires from the pot terminals 2 and 4 over to turrets T38 and T48
of the turret board.
Step 11
– Cut these two
wires to length, strip and
tin the ends.
Step 12
– Solder the wire
from terminal 2 (the wire
with the mark on it) from
the pot to turret T38.
Step 13
– Solder the wire
from pot terminal 4 to
turret T48. There are wire
routing holes in the turret
board for these wires.
Step 14
– Neatly run the
two wires from terminals 3 and 5 of the pot over to
turrets T40 and T46 of the turret board.
Step 15
– Cut these two wires to length, strip and tin
the ends.
Step 16
– Solder the wire from pot terminal 3 (the wire
with the mark on it) to turret board turret T40.
Step 17
– Solder the wire from pot terminal 5 to turret
board turret T46. There are wire routing holes in the
turret board for these wires (photo 11L – next page).
58 TubeDepot.com
photo 11h
bend terminals >
together
1
2
3
4
5
photo 11i
photo 11j
photo 11k
NOTE
Refer to the drawing on page 58 for a very clear layout of how to wire this type of master
volume. The various wire colors are for clarity of explanation.
