Randall Ultra Module gain

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alboz28

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Hi Everyone,

I have a Randall Ultra module that I am using with a Syn50 head. Issue that I am having is that this module has a tremendous amount of gain and is touchy past 9' o'clock where it gets out of control (noise, squealing etc) if I turn much below 9' o' clock I lose the fullness of the tone. The module is somewhat modded with a .0022 cap in C3 and a switch for a 100pf or 250pf cap in C14.

What suggestions might ther be to reduce/tame the gain in this module (resistors etc) or is a 5751 tube in V1 a good option?

Thank you for any help
 

mm222

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I'd start with a 5071 in V1. I have also had good luck putting a 12AT7/ECC81 in V1 on some high gain modules.
 

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