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Need HELP - getting static noise when using my tube preamp while computer is on...

HI everyone. I have an issue when using my Cary Audio tube preamp (SLP-98) and I have my computer running. I have random static noise going through the preamp when my computer is running. Im guessing its EMI, but there’s no way to distance my computer from my preamp in my current space. Using different tubes, interconnects and power sources (wall plug vs. power conditioner) hasn’t helped. If I turn the computer off the static goes away.

Is there a way to reduce or eliminate this interference so I can play PC FLAC files through my tube pre without getting random static? The rest of my setup is an RME DAC, MF M6s PRX power amp, and Tannoy XT8f towers.
128x128galacticmayan
lowrider57's avatar
lowrider57
5,393 posts
 
The computer needs to be on a separate circuit than your audio system.

It's probably RFI. How is the computer hooked up to the preamp?

Does your power conditioner have RFI/EMI filtering? Only use it for the preamp and audio components.


galacticmayan's avatar
galacticmayan OP
20 posts
 
@lowrider57 I can only reach one dual wall outlet at the moment, but I tried plugging the computer to the wall and everything else on my Furman PST-8, which says they have ’filtered inputs’. I’ll have to dig for the manual. The preamp is connected to the computer via the RME DAC using RCA cables.
galacticmayan's avatar
galacticmayan OP
20 posts
 
@russ69 I use primarily Zavfino and Blue Jean cables. both are 'insulated' but I'll have to check if they're shielded.
chilehed's avatar
chilehed
198 posts
 
Does the computer use a three-pronged power cord? If so you can try using a "cheater" plug. https://en.wikipedia.org/wiki/Cheater_plug
galacticmayan's avatar
galacticmayan OP
20 posts
 
@chilehed interesting. I'll give that a shot. 
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