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Vintage threads from the first ten years
power amp oscillating, and ps caps qs
 11/1/2003 6:30 PM |
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swt | power amp oscillating, and ps caps qs Hey guys!- i have a twin reverb type power amp and reverb, with two channels. one is the normal twin rev clean with a master to achieve a small crunchiness, and the other one is a dumble type of overdrive. If i put the master on any of the 2 channels above 7 the power amp goes into self oscillation. I built this amp in an old one no brand, but good transformers, and sockets. Six nine pins, and 4 8 pins, and also reverb transformer and choke. I'd used the original caps for the power supply. i assumed the are really old. Can this be the cause?. Or maybe just bad layout. It's got starground, and i tried to keep the leads tidy and short. any suggestions?. Also...if i have the dumble channel modified into a marshall type of pre...how can i add reverb to it?. Thanks a lot!! |
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| Replies: |
| swt to the top... -- 11/3/2003 5:14 AM jeremy when rebuilding an old amp into a m... -- 11/4/2003 1:15 AM |