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The Fine Things are Always Hand Made

Kent King's Blog – March 2023 Archive (1)

Volume Expander

OK folks...question: Here is the schematic of the outboard volume expander for an AW23. I was working on one earlier today and noticed a mod that I had not seen before. If this mod isn't factory, it was done a <long> time ago - near its original production. The mod is simple - a 20ufd/25VDC cap is wired from the 6A7 cathodes to ground (+ side on the cathode). It is soldered right on the wiper of the balance potentiometer. Any thoughts on what this might do? Should I remove it/leave it…


Added by Kent King on March 4, 2023 at 9:16pm — 3 Comments

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