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Vintage threads from the first ten years
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Re: volume loss from time to time
 2/3/2006 7:26 AM |
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| R.G. | Re: volume loss from time to time Dirty/contaminated effects loop Failing power rectifier lowering B+ from time to time Failing choke making lower B+ on preamp tubes Failing resistor in pi-filters making lower B+ to preamp tubes Bad contact in AC power line making intermittent power loss Bad fuse in AC line making intermittent power loss Intermittent contact on tube socket Intermittent crack in signal coupling capacitor/signal wire/resistor/etc. Intermittent short/loading on OPT winding this just goes on forever. What you have to do is poke around until you find out how to make it fail reliably, or catch it while it's failing, as noted in the TADP. Does it fail suddenly? Probably a crack or short. Does it fade in/out? Probably a thermal problem with a a part. Does banging on the chassis make it work/fail? Probably a mechanical contact. First, find out how to get it to fail. That's probably 90% of finding a fix. |
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| Enzo Or to paraphrase, the most valuable... -- 2/3/2006 8:12 PM |