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Post by michaelsteele on May 16, 2021 13:40:39 GMT -5
Hey guys, I’ve recently been having a problem with my fender 94 twin (“evil twin”) amplifier. I’ll turn the amp on and it will make a loud buzzer noise at random times that can only be fixed by banging/tapping on the top of the amp. It’s does it the same amount whether it’s in the 25 watt or 100 watt mode, and it makes no difference whether I’m playing or not. It does it at seemingly completely random intervals. Any help would be much appreciated. Here is a link to a video that showcases the problem
The problem starts around 18 seconds in. Thanks again for any help
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Post by blademaster2 on May 17, 2021 12:57:21 GMT -5
I get something like that on occasion on my AMPEG, and it is usually related to power line noise or motors switching. In your case it sounds a bit worse, but it still could be power line noise depending what your power utility is like in your location. Otherwise it could be the big electrolytic capacitors that need replacement (mine are old, but crazy expensive so unless I truly need them I will hold off).
If you cannot correlate it to temperature, or the capacitors, then I would at least try to determine if it was somehow related to external power supply noise. Some folks might suggest cleaning the tube contacts, which I have never done myself but might cause intermittents as well.
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