Resto/Mod Tube Amp from Magnavox Console: Replacing Tubes and Setting the Bias



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If your amp allows fine tuning of the bias current, then changing output tubes means setting the bias current. This was my first tube amp build, and I didn't make the trimming pots for the bias accessible from the top. In this video, I replace the output tubes and open up the amp to reset the bias. I also wrestle, and fail, with adjusting the so-called AC balance between the "push" and "pull" tubes. But the bottom line is that the amp sounds great at the end of the process! Sound testing features The Rolling Stones, Boston, Steve Winwood, and Pink Floyd.
Category
Audio
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