The toroid in my audio amplifier is making a horrible squealing noise and I'm looking for tips on the proper fix. I know it's mechanical noise, if I put something on the toroid to stop the vibrations it gets quiet, but surely this cannot be normal for an audio amplifier. So I guess my question is, did age just loosen up the toroid (the amp is probably 20 years old) and the proper fix is to try to tighten it up, or is this really an indication that I've got another bad component on the board somewhere that needs to be replaced?
I bought it as damaged on ebay, replaced a bunch of bad caps and now it seems to be operating just fine except for this noise. I would like to resolve it properly so I can resell it (new hobby). Here's a video showing the noise, any tips would be great:
I bought it as damaged on ebay, replaced a bunch of bad caps and now it seems to be operating just fine except for this noise. I would like to resolve it properly so I can resell it (new hobby). Here's a video showing the noise, any tips would be great: