I own a Fender Hot Rod deluxe that recently started behaving strangely. Upon power on/warm up/take it off stand by, everything works fine. it plays great on both channels. Then, after about an hour, volume decreases to nothing in about 6 seconds, making crackling sound as if it was put on standby while still playing. Amp power is still on, tubes still glowing. Sometimes, it will stay down for a few minutes and return on its own, but most of the time the amp needs to be turned off for a few minutes and restarted.
I generally keep volume for both channels at 3, so i am not pushing too hard.
The problem is independent of instrument, instrument cable, amp input, and channel selected. I have plugged the amp into several power sources and the behavior is the same.
The problem is that it cannot reliably be recreated. Sometimes it doesn't happen at all. Wednesday it happened 4 or 5 times within 2 hours, last night it happened once in 3 hours.
I have taken the amp to a repair shop, and the technician was unable to recreate the problem, thus unable to troubleshoot. We decided to go ahead and change all tubes, for the amp needed it anyways. The problem persists.
I work in IT, and understand the troubleshooting process, but not electronics/amps. What problem/component could potentially cause this behavior?
Thanks for your time.
I generally keep volume for both channels at 3, so i am not pushing too hard.
The problem is independent of instrument, instrument cable, amp input, and channel selected. I have plugged the amp into several power sources and the behavior is the same.
The problem is that it cannot reliably be recreated. Sometimes it doesn't happen at all. Wednesday it happened 4 or 5 times within 2 hours, last night it happened once in 3 hours.
I have taken the amp to a repair shop, and the technician was unable to recreate the problem, thus unable to troubleshoot. We decided to go ahead and change all tubes, for the amp needed it anyways. The problem persists.
I work in IT, and understand the troubleshooting process, but not electronics/amps. What problem/component could potentially cause this behavior?
Thanks for your time.
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