Hello,
I am working on a PV xr 600 mixer amp that has two amplifier channels on the same board. I replaced smoked and shorted components and the amp does work but it clips early and oscillates on the negative swing of the wave form at about -20 volts driving an 8 ohm load. Funny thing is the waveform is perfect if I touch the heatsink that mounts one the driver transistors. There is also no trace of oscillation with no load. Any one have experience with this??
Thanks, JL
No help on the problem but, if you need the schematic, all I need is an email addy and I'll fire it off to you.
I worked on a peavey power amp that had blown output transistors - replaced the output trannies and the trannies in the previous stage - but output was very low on one channel - turned out there was a small signal transistor blown that was causing the output limiting circuit to cut in
hope this helps
neilish
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