All of the transformers I looked at had the same color coding for the wires. Some of the wires were solid color PVC. Others were double cotton covered with colored threads woven into the outer covering. The PVC did not hold up well at all.
The original colors were (are) green and black on the secondary and blue and red on the primary. When I rewired my 1st transformer, I used yellow instead of red so that's what I'm doing with the rest of them.
Yellow - blue: 22.7
Green - black: 21.8
Yellow - blue: 25.0
Green - black: 24.6
Yellow - blue: 22.3
Green - black: 22.7
Yellow - blue: 24.1
Green - black: 23.9
Yellow - blue: 23.2
Green - black: 24.5
Page: /T5/Resis_tbl.shtml
Last modified: Friday, 24 Apr 2026