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RE: 90watt tube amp issue? mod advice?

I talked to your brother about these amps which I thought he had gotten them..There are issues with these amps and I am working on that now as I have a pair of them at disposal..Motorun caps help but the feedback and the regulation are the two issues that have to be addressed.Also,the 12au7 should be eliminated..It was installed as a preamp function for allen organs and public address or background music systems..Once the FB loop is rerouted to the first 6sn7,you will immediately notice improvement.There is also noise on the OD3s which supply the source for the 6550 screens.
As my situation improves more with my back and sciatica,I will be of more help.Its getting there.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

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