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Lopsided Push-Pull 7591S Pair, 6U8A Splitter
I have made a few mods to an Ampeg Gemini-2 G-15 Amplifier. I took out the vibrato circuitry, as well as the 'clean' preamp channel, and modded the reverb,...
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Yellow Jackets in a Gibson GA-30RVT (7591s)?
Hi, I have this great old 3D sounding Gibson GA-30RVT with 7591 tubes that just does not want to distort naturally even when I crank it all the way up. I...