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Rega P9/Apheta Hiss/not Hum

Hello:
I wonder if anyone can help with this issue. I have a Rega P9 and a Rega Apheta cartridge. I recently added a Sutherland PH3D phono stage to try to eliminate a hissing noise (this is not the typical rega hum that many report). The noise sounds very much like tube rush. It's very noticable with the volume at about 11 o'clock. When I turn the phono stage off it goes away so I know it's upstream of the Sutherland. This also happens with another phono stage I have that also suffered from RF interference. At least that's gone with the Sutherland. I have tried 3 different interconnects too with no change. The arm was rewired because of a broken tag. Brit Audio replaced the internal wiring with Cardas but left the external wiring as stock.

Does anyone know if this could be a cartridge problem? Doesn't seem to me to be a ground problem.

Thanks!!
arch7

Showing 1 response by arch7

arch7 OP
35 posts
 
Hi:

Thanks for your responses. I get this noise even with the P9 power supply off. My amp is 3 or 4 feet from the TT. I spoke with the Sound Org guys too. Very helpful and pleasant to speak with.

A few people have told me it might just be the amount of gain required for a .5mv cartridge that results in some noise. Ahh the fun of analog!

Thanks!
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