Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: plexi50 on November 30, 2024, 06:40:07 pm
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Ok i got a real Doozy and my mind is scrambled. Getting older is taking it's toll. I am trying to wire a new Power Selector Switch up for a 1979 Marshall 2959 Super Lead..
It doesn't help that their is next to ZERO info on the DE 14646 power transformer other than it's limited production for 1979. Here are some pic's i have posted to help understand my situation. I assume (bad) that the Red wire goes to the center tab on the switch. I have deciphered by rotation of the selector switch from 120-230-240 which terminals correspond to the center terminal of the switch.The wires are Red Primary then Violet, Blue ,Brown. Without any PT info this is a gamble and i don't gamble. Please help if you can. Thanks all!
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Done. A matter of jumping the gun and doing to many things at the same time. Overthinking it i confess! :dontknow: Like just use the DVM Dah! :l2:
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Blue - 0V? Brown - 120V? Violet - 225V? Red - 240V?
Curious.
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PT Red Primary 175-0-175 VAC Forgot to write down the Red wires voltage.
Brown-w Dot 120 VAC
Blue 230 VAC
Brown 240 VAC
Plates 450 VDC
Screens 449 VDC
Bias -40.0 VDC Grids
Initially the violet wire looked violet for a run and then it looked more brown with a white dot on it.Without any schematic or other amp pic's online to confirm the actual color of the 120vac wire i went with brown with a white dot on it. Voltage testing of each PT wire was the only way to confirm each wires voltage. Have gotten to comfortable relying on a schematic all these years