In the process of going through and restoring my 1974 Marshall I’ve noticed the secondary B+ wiring color code is odd.
I’ve got:
B+:
Blue (hot)
Yellow (center)
Red (hot)
Bias:
White (hot)
Green (gnd)
Heaters:
Black (hot)
Solid Green (gnd/center)
Black (hot)
The heaters have 0.05 ohms between the center tap and hot.
Nothing I have found shows blue as a B+ hot wire. Is this a stock Dagnall PT?
1974 Marshall PT color Confirmation?
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- neikeel
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Re: 1974 Marshall PT color Confirmation?
Can you post some images of your PT?
The heaters and bias taps sound correct but the HT sounds funky.
Yellow is a normal centre tap colour
The HT on both my 71s are Blue/Black
The heaters and bias taps sound correct but the HT sounds funky.
Yellow is a normal centre tap colour
The HT on both my 71s are Blue/Black
Neil
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Re: 1974 Marshall PT color Confirmation?
The amp is currently upside down and torn apart, no good pictures right now unfortunately.
Yeah the HT is a little suspect. When I bought the amp I didnt see any writing on the bells. The transformers look original and I was told they were original. The string wrapping was still present before the restoration began and had that rosin light coating on them so it seems original?
Yeah the HT is a little suspect. When I bought the amp I didnt see any writing on the bells. The transformers look original and I was told they were original. The string wrapping was still present before the restoration began and had that rosin light coating on them so it seems original?