Having hum issues myself - but minor, I think, compared to yours. Are you running any kind of ground from the TT? Have you checked this ground connection?...also the effects of disconnecting it?
HELP - I Weird Hum or FeedBack Problem
I have a Cortese preamp and I get a hum , actually I think it's feedback when I turn the volume to 10 oclock, 7oclock is off. I only get the hum or feedback when the cartridge needle is on the record.I don't get any hum when using the cd or anything else it's only when using the phono stage. I tried using different plugs for the power cords and also unplugging the tv but I still get the hum.
Another thing when I first turn on my preamp my left channel speaker makes a squeaking noise and the driver vibrates and I hear a puff .... for about an hour until it warms up and the noise gets softer and softer but never goes away. If I turn the volume up to 12oclock and the cartridge is in it's locked position with the cartridge in mid air. I will hear this pulsing noise or a light puff ... but no feed back.
Before emailing Supratek I thought I would post here for a a solution. The last time I shipped my preamp to New York it got damaged.
Any suggestions are appreciated.
Abill
Another thing when I first turn on my preamp my left channel speaker makes a squeaking noise and the driver vibrates and I hear a puff .... for about an hour until it warms up and the noise gets softer and softer but never goes away. If I turn the volume up to 12oclock and the cartridge is in it's locked position with the cartridge in mid air. I will hear this pulsing noise or a light puff ... but no feed back.
Before emailing Supratek I thought I would post here for a a solution. The last time I shipped my preamp to New York it got damaged.
Any suggestions are appreciated.
Abill