[seven]

I'm finding a few transformers for my older gear are starting to buzz. Two things I noticed last night. One is a wall wart (easy to replace if needed) and the other is a funky old rack mount delay with an internal transformer.

I can pull the transformer from the delay and replace it, but is there anything I can do to fix the current transformer?

I understand what makes the noise, I've just never gone about messing with transformers to fix a problem like this.

Would putting a ring of epoxy putty around the coils help?