trinityamps.com

I just completed a plexi kit and the normal channel works great but there is no sound from the tmb channel. All voltages check out. I initially found a problem where I had connected one of the signal inputs to v1a (pin 2) to the center lug of the termial strip thus grounding it. I corrected that problem but still no sound. Also with both the gain and volume at high settings a loud squeal develops at high treble settings. Please advise with any suggestions.

Have you resolved your issue yet? You can start by re-tracing/re-checking every connection marking them on the layout as you go.

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Les

http://www.soundclick.com/unimind

Assuming you've got the amp open on the bench..
With the TMB Master volume turned up half way..do you hear a "pop" when you touch a voltmeter lead to pin 2 or pin 7 of V2? If so then the problem is with V1a or the volume(gain) control. If not then the tone stack/master vol. area is suspect. This assuming also, that you've changed tubes ect.