step up transformer noise


I purchased an amp from Europe that needs 240v [ I am on north American voltage].. I bought a step up/step down transformer to equalize the voltage. it works, but the transformer produces noise through the speakers, even when the amp is turned off. the transformer I bought was $60.. do I need one specific for audio applications? any suggestions?thanks for any help, dan
pianopig

Showing 1 response by houstonjazzfan

Is it better to position a step up transformer near the phonostage or near the turntable to prevent issues with hum?