both turrets (photo 6.9h).
Step 46
– Install a 47μfd/50V electrolytic capacitor between turrets T57 and T58. Solder at
both turrets. Make sure to connect the positive lead of this capacitor to terminal T57.
Installing the Interconnect Wiring
Back Edge, 20AWG
Step 1
– Cut a 5” length
of white 20AWG wire and
strip and tin 1/4” at one
end.
Step 2
– Make a small
hook in the end just large enough to fit around a
terminal (photo 6.10b).
Step 3
– Insert wire through the routing hole nearest terminal T10 from the top of the board.
Step 4
– Place the hook in the wire around terminal T10 (photo 6.10c) and solder in place
(photo 6.10d). Pull all excess wire tightly through hole (photo 6.10e).
Step 5
– Cut a 5 1/2” length of white 20AWG wire and solder
to terminal T12 as above.
Step 6
– Cut a 5” length of white 20AWG wire and solder to
terminal T14 as above.
Step 7
– Cut a 7” length of violet 20AWG wire and solder to
terminal T18 as above.
Step 8
– Cut a 3 1/2” length of red 20AWG wire and solder to
terminal T20 as above.
Step 9
– Cut a 3 1/2” length of red 20AWG wire and solder to
terminal T22 as above.
6.10
38 TubeDepot.com
For a uniform look when installing these wires, have all the wire hooks soldered to their
respective terminals facing the same way. It looks great (photo 6.10f).
NOTE
NOTE
MIL-SPEC soldering specifies wrapping the wire between 180° to 270° around the
terminal. More than this makes future maintenance and modifications much more difficult.
photo 6.10c
photo 6.10d
photo 6.10e
Refer to “Cool Modifications”, Chapter 11 for directions on installing a post phase inverter
master volume or for substituting an EF86 for a 12AX7 in the normal channel.
MOD
To speed up the process of measuring and cutting the wires, I recommend laying a strip of
masking tape on your work bench and marking, in 1/2” steps, from 0 to 10” (photo 6.10a).
NOTE
photo 6.10a
photo 6.10b
By temporarily installing the standoffs to the turret board, the board will stand clear of the
work bench making soldering the wires to the board much easier.
NOTE
Install an 8W “Brown Devil” 150Ω resistor (
R-B8J-150
) in place of the sand cast 150Ω/10W
resistor for a way cooler vintage look.
MOD
