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-   -   Home build 6L6 pp amp no sound (http://www.diyaudio.com/forums/instruments-amps/194463-home-build-6l6-pp-amp-no-sound.html)

dscottguitars 11th August 2011 11:38 PM

Home build 6L6 pp amp no sound
 
I gone over and over my power amp I built and cannot get any sound. It is a bassman aa864 but cathode biased. Everything else is exact. I don't have a preamp yet, it's just the phase inverter and output tubes.

Is that okay? Do I need to have the preamp plugged in? It is just a signal line, no voltages. All the voltages read within ranges. I have 420v on the plates, 418 on the screens, 270v, roughly, on the phase inverter plates, 12AX7.

I cannot hear anything from the speaker. Please help.....

dscottguitars 13th August 2011 12:20 AM

sound
 
I found the problem, the rotary switch is weird... and it does work w/o a preamp.


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