Isolation transformers

[dholmes]

I need a isolation transformer for a 20 amp circuit that doesnt costs a lot of $$$ Any suggestions? I found some but they where 300.00 thanks ps this is not ground loop its the transformer buzzing slightly.

[GV#27]

Do you have a transformer in a piece of equipment that is buzzing?
If it has a mechanic buzz an isolation trans won,t help.