Quote:
Originally posted by Frost
I am certian that this is the transformer buzzing. I took apart the amp because I assumed that it had come loose. I tightened the nut holding the donut in place and it helped but this IS a mechanical noise from the tranny. It makes this noise with no speakers attached. It only makes this noise when plugged in at her apartment. Im kinda baffled too.
Frost |
Hi
Not a good idea to overtighten it as you could crush the windings...
There's no way that it's creating a shorted turn? Like if the bolt in the middle can touch the chassis at both ends?
Is the transformer hot when it buzzes?
Was the amplifier moved from another location? It may have moved something...
eg
The toroid has a low external field but radiation does escape out of where the wires exit. You may find that the toroid's stray field is being picked up by some sensitive piece of circuitry or even pc track if it forms a circle (as in copper flood around an area).
You may find that rotating the toroid minimises the pick up.
The toroid ought to sit on a soft rubber washer to protect the windings and must not be overtightened.
