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Anyone Know Where I should Look to Figure Out This Hum?

http://https//www.dropbox.com/s/faxmop972rok7i1/Noise.m4a?dl=0

I recently purchased a Lamm LP2. First couple days, silent. Now this. It's coming from both sides equally, turning up the volume makes it louder. It's not the cartridge. Noise still there when I unplug the turntable inputs from the phono preamp. It sure doesn't sound like a ground hum and since it's both channels I don't think it's going to be a bad tube . I have another set of tubes on the way but they won't be here until next week so I can't double check that. I swapped out the rectifier tube and that changed nothing. 

Help!
dhcod
oldhvymec
5,101 posts
 
The above site can't be reached by me.. What do you think it is?

If it's not a valve, what else? A bad connection, cost nothing to check.
Swap sources, cost nothing to check. swap valves, cost $$$
Duno!!!!

regards,,
dhcod OP
710 posts
 
https://www.dropbox.com/s/faxmop972rok7i1/Noise.m4a?dl=0

Sorry, bad link copy and paste. I can't change it on the original but here it is.
stringreen's avatar
stringreen
6,475 posts
 
Have you noticed the noise coming on with your refrigerater defrosting, etc....how about the tv on/off, etc.
dhcod OP
710 posts
 
Thanks for the suggestion. Interesting but no. Coincidentally the fridge is broken and unplugged awaiting repair. No TVs on. I just unplugged the DVR and turned off everything else in the house and the noise is still there. The system is on a dedicated circuit.
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