Step 3
– Bend a small hook in the end of this wire and solder the wire to the nearby #8 solder
terminal at the corner of the power transformer nearest the power (on/off) switch.
V1 wiring
Step 1
– Cut a 26” length of 20AWG red wire and an equal 26” length of 20AWG black wire.
Step 2
– Twist these two wires tightly together the full length.
Step 3
– Untwist these wires about 2” from one end of the twisted pair and strip and tin the
black wire at this end.
Step 4
– Install the tinned end of the black wire into terminals 4 and 5
together of V1 and solder.
Step 5
– Route the black wire tightly against the chassis and to the
rear chassis edge.
Step 6
– Form a 90 degree angle in the black wire at the chassis
edge and lay the remaining wire pair in this corner chassis edge
behind the remaining tube sockets.
Step 7
– With the loose red wire end, measure an adequate running
distance from the 90 degree angle in the black wire (about 1/2” is
good and re-twist this red wire with the black wire to maintain
uniformity) and make a sharp 90 degree bend in the red wire.
Step 8
– Run this wire up to terminal 9 of the V1 tube socket and
make another 90 degree bend in the red wire so that the red wire
points directly toward terminal 9.
Step 9
– Cut the red wire approximately 1/4” to 3/8” from this second bend.
Step 10
– Strip and tin this end and solder it to pin 9 (photo 5.10a). Try to apply as little heat
as possible (solder quickly) so that the insulation doesn't contract too much.
Step 11
– Trace the twisted pair over to the opposite side of the V2 tube socket (between V2
and V3). Bend a 90 degree bend in the twisted pair from the chassis edge in line with pin 9 of
V2 socket.
Step 12
– Cut the wire pair approximately 1 1/2” inch from the chassis edge where the 90
degree bend is and lay the remaining wire pair to the side.
V2 wiring
Step 13
– Untwist the wires approximately 2” from the cut end and run the red wire tightly
along the chassis edge and up to terminal 9 of V2. Reform the 90 degree bend as necessary
to maintain uniformity.
Step 14
– Make another 90 degree bend in this red wire so that the red wire points directly
into terminal 9 and cut 1/4” to 3/8” after this second bend.
Step 15
– Strip and tin the red wire and insert into pin 9 of V2. Do not solder just yet.
Step 16
– Position the black wire against the chassis and re-twist the black wire around the
red wire as needed to maintain uniformity.
16 TubeDepot.com
To get an even twist and to speed up the filament wiring process, use a handheld drill to
twist the two wires together. Place the loose wire ends into the drill chuck and rotate the
drill slowly until the wires are tightly twisted..
NOTE
photo 5.10a
For hints on improved soldering skills, review Appendix B at the end of this manual.
Additionally, see “How to Solder”, http://www.youtube.com/watch?v=cIDydYIVTqU
NOTE
