VintageKustom.com: Replacement Part Suggestions » K250-4 Selective Boost Issue

K250-4 Selective Boost Issue [message #23124]

Mon, 15 June 2015 10:08

fullblare
Messages: 5
Registered: October 2012
Location: Sioux City

Junior Member

I've been restoring a K250-4 Amp that I purchased locally. Thanks to this this forum I have been able to build a food switch to turn on and off the Fuzz, Selective Boost, Reverb and Tremelo. The only issue I'm having is the selective boost works only for a few seconds when you first turn on the amp and then quits. I have the pedal that came with the amp and have tested it to make sure the potentiometer is good and the cord appears to be good as well. With my electronics knowledge it almost sounds like a bad cap in the RC circuit. Looking at the schematic and "S2" Selective boost cirecuit I'm wondering which cap I should be looking at. Has anyone else run into this issue?

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