Step 14
– Install the two .022 ufd coupling capacitors in
positions C1 & C2. These capacitors do not have a polarity
and can be installed in either direction.
Step 15
– Install the two 10ufd / 450V electrolytic filter capacitors
in positions C8 & C7. These components have a polarity,
therefore they must be installed according to case and board
markings (photo 5.1b).
Step 16
–
Install the 22ufd / 500V filter capacitor in position C6. This component has a polarity,
therefore it must be installed according to case and board markings (photo 5.1b).
Proceed to 5.2
Installing the Wires to the Board
Black Wires (Grounding)
Step 1
- Strip back the insulation from the end of the
black wire 1/8” and tin the end of the exposed
strands. Insert the tinned end of this wire into the pad
labeled “G1a” and solder. Measure and cut this wire
to a length of 3” from pad G1a (photo 5.2a).
Step 2
– Repeat above for pad G2a & G2b.
Step 3
– Repeat above for pad G3a except extend to
4” length.
Step 4
– Repeat above for pad G4a (4” length).
Step 5 – Repeat above for pad G6a (3” length).
Red Wires (Circuit B+ and Preamp Tube Inputs)
Step 5
- Strip back the insulation from the end of the
red wire 1/8” and tin the end of the exposed strands.
Insert the tinned end of this wire into the pad labeled
“d” and solder. Measure and cut this wire to a length
of 3” from pad d.
Step 6
– Repeat above for pad e.
Step 7
– Repeat above for pad m.
Yellow Wires (General Signal Routing)
Step 8
- Strip back the insulation from the end of the
yellow wire 1/8” and tin the end of the exposed
strands. Insert the tinned end of this wire into the pad labeled “a” and solder. Measure and cut
this wire to a length of 3” from pad a.
Step 9
– Repeat above for pads b.
Step 10
– Repeat above for pad c except extend wire to 4”.
Step 11
– Repeat above for pads f through k.
Step 12
– Repeat above for pad n (photo 5.2a).
Proceed to Chapter 6
If using the 16ufd/475V Sprague Atoms in the C6
position, the positive end of the capacitor must be
mounted as close toward R11 as possible. In this way,
the negative end of the Sprague Atom 16ufd/475V cap
will clear the pilot lamp assembly without shorting out.
CAUTION
TubeDepot.com 9
photo 5.1b
5.2
photo 5.2a
