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Quote from: Tassieviking on December 19, 2023, 12:06:40 PMIf you want to mess with the amp then you should leave the power amp section alone.
The pre-amp is where the tone shaping happens.
The closest you should go to the power amp is the 100nF cap going into the power amp, that 100nF cap with the 100k to earth is a HPF filter that drops any frequencies below 15.9Hz. Change to a 10nF cap and the frequency is 159Hz, experiment if you like.
I would concentrate on the tone stack, changes there will affect your tone more.
Are you sure it is not the speaker itself that is dark sounding ?
Quote from: saturated on March 29, 2024, 08:37:10 PMAlso it seems like the tube close to the doghouse (rectifier) looks kinda white ashen....idk.