05-26-2016, 11:56 AM
(This post was last modified: 05-26-2016, 12:13 PM by karpathion.)
You get anywhere on this one yet, or are you waiting for the other components to come in?
Do you have a signal generator or Variac? You may want to check that OPT primary. You mentioned that they were prone to spikes and burning up.
From the absurd amount of Marshall circuit info I have absorbed lately, this was a problem for a couple Marshall models, and many clones of several models. Apparently those type of amps require a 1.7k or 2.2k primary. 4k or 3.3k primaries where used in many cases. Or something like that...
Yours is probably right, but it might explain the OPTs popping on them in the past. The 1.7k is what you are shooting for, I believe. Do you know your exact PT secondary voltages yet?
Do you have a signal generator or Variac? You may want to check that OPT primary. You mentioned that they were prone to spikes and burning up.
From the absurd amount of Marshall circuit info I have absorbed lately, this was a problem for a couple Marshall models, and many clones of several models. Apparently those type of amps require a 1.7k or 2.2k primary. 4k or 3.3k primaries where used in many cases. Or something like that...
Yours is probably right, but it might explain the OPTs popping on them in the past. The 1.7k is what you are shooting for, I believe. Do you know your exact PT secondary voltages yet?
I hear Mexico is nice this time of year.