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Any idea what amp circuit that is? It looks too complex to be a Little Gem or Ruby circuit, and his seems to have some cool features I've not seen anywhere else.

wow, I am honored to be featured here, thanks a bunch!

The circuit is basically the little gem, but with the headphone jack interrupt between the output and the speaker, and the LED power indicator/strum power/ tuning light bridged between the pos lead of the 9v and the pos track on the circuitboard.

I also use a stereo 1/4 input jack's other channel to turn the unit on by passing the ground through it, and back to the battery.

I'll see about darwing up a diagram. I had no idea there would be interest in that.

The rest of my projects are here at www.nonentity.com

Thanks folks!

ok, for those of you interested, the schematic is now posted here - http://www.nonentity.com/New/Main/Projects/PracticeAmp.htm

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