Check for shorted filter caps. Check for shorted rectifier tube (5Z3 if you have 501 amp, 5U4 in the 503). Check for shorted transformers. Send it along with your tubes to Bill Bickers in FL if you can't fix it. On Thursday, August 21, 2025 at 01:04:58 PM EDT, ascott822--- via Jukebox-list jukebox-list@lists.netlojix.com wrote:
The amp was recapped two years ago and the box has been playing fine until recently. When there was no sound when recent selection was made then I checked the fuse. It was blown and continues to blow replacements.
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