Hum question

Sorry Daneile, I will try to explain it further. In the US, our electrical outlets have two wide recesses and usually one pin-like recess which accomodates the male plug from your component. In more modern connections, one of the wide recesses is a bit larger than the other. My suggestion is to unplug your component (one at a time) and turn the plug 180 degrees so you are now inserting the plug "upside down". Because the long pin is now not in its proper position to allow the plug to be inserted into the wall, You can go to a hardware store and buy an adapter with only 2 wide prongs and with no long pin. Be sure to get an adapter (cheater) that is able to accomodate the slightly wider main pin ,,,these 2 main pins may be of slightly different widths. If you can't find this kind of adapter, you can simply cut off that long round pin. You very well might find that the hum is gone with the plug reversed in the wall. If that is the case, you can replace the plug wiring it backwards, or cut off the ground connection (the long round pin). I found many ground loops this way. Good luck....let me know if this solves your problem. One more thing...these adapters will slightly degrade the ultimate performance of that component, so you will just us it for testing.

ah, ok, Stringreen, now I undesrtand.
and I must say that I already made that attempt (exactly the way you describe it, except that it's eaasier with italian plugs, which have equal prongs), unfortunately without success.
thanks anyway, ciao.

OK Daniele...now what I would do is plug the phono into a high level input of the preamp which eliminates the phono circuit..testing it this way, make sure the volume is way down and slowly bring it up to see if the hum is present there.

OK, I'll try :)