Specifications

the middle terminal of the normal channel volume control
(photo 6.17a and drawing 6.17b).
Step 4 – Strip and tin the end of the yellow wire coming from
pad “f” and lightly tack this wire in place at the middle terminal
of the bright channel volume control (photo 6.17a). Do not fill
the terminal with solder just yet.
Step 5 – Route a red 20AWG wire, 12” in length, behind
the electronics assembly PC board, beginning at the
volume controls and coming out between the preamp
tube and the speaker output jack.
Step 6 – Strip (but do not tin) the end of the above red
wire at the volume control end and insert the red wire into
the outside terminal of the normal volume control nearest
the input jacks (terminal “C”) but do not solder just yet
(drawing 6.17b).
Step 7 – Cut two pieces of yellow wire, each 2-1/2” long.
Step 8 – Strip both ends of each of these two wires but
do not tin.
Step 9 – Install the first 2-1/2” wire piece into the outside
terminal nearest the input jacks of
the normal volume control along with
the previous red wire (terminal “C”).
Solder both in place (drawing
6.17b).
Step 10 – Route the other end of
this yellow wire to the “C” terminal
on the bright volume control (photo
6.17a). Do not solder just yet.
Step 11 – Install the second 2-1/2”
piece by inserting one end into the outer terminal of the bright volume control (terminal “C”)
and solder both wires in place.
Step 12 – Route the other end of this wire to the middle terminal of the tone control (terminal
“B”) and solder this wire in place (drawing 6.17c).
Step 13 – Solder the 500pfd Silver Mica capacitor between the middle terminal of the bright
volume control (terminal “B”) and terminal “C” of the tone control (drawing 6.17c).
Step 14 – Solder the .0047 ufd capacitor between the “A” terminal of the tone control and the
back of the tone control pot (drawing 6.17c).
Proceed to 6.18
Wiring the Rectifier Tube
Step 1 – Strip and tin the two red wires from the power
transformer. Solder these to pins 4 and 6 of the rectifier tube
socket (photo 6.18a).
Step 2 – Strip and tin the two yellow wires from the power
6.18
“Tacking” a wire means to apply just enough
solder to hold the wire in place. It is a temporary
bond while waiting for some other assembly
process to be completed before final soldering.
NOTE
20 TubeDepot.com
drawing
6.17c
photo
6.18a
drawing
6.17b
photo 6.17a