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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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[Message index]

		K250-4 Selective Boost Issue By: fullblare on Mon, 15 June 2015 10:08
		Re: K250-4 Selective Boost Issue By: chicagobill on Mon, 15 June 2015 15:29
		Re: K250-4 Selective Boost Issue By: stevem on Tue, 16 June 2015 06:01
		Re: K250-4 Selective Boost Issue By: stevem on Wed, 17 June 2015 11:29
		Re: K250-4 Selective Boost Issue By: fullblare on Thu, 18 June 2015 08:36
		Re: K250-4 Selective Boost Issue By: chicagobill on Thu, 16 July 2015 16:10
		Re: K250-4 Selective Boost Issue By: Iowa Boy on Fri, 17 July 2015 00:45

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