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nielsk

Re: 10KHZ Ground Noise in Studio
« Reply #20 on: April 21, 2016, 08:06:03 AM »
Have you tried turning all the lights completely off?
I once encountered this problem in a studio, took a while to find the culprit:
A compact florescent bulb outside the back door...
Outside noise can get in on the power line, that Furman is not going to stop much... you can try running enough of the studio to test for the noise on a UPS diss-connected from the mains to rule out noise on the mains.


Speedskater

Re: 10KHZ Ground Noise in Studio
« Reply #21 on: April 21, 2016, 02:35:02 PM »
Jim Brown is the go-to noise & interference expert. Some of his papers have sections on this problem.

"Power and Grounding For Audio and Audio/Video Systems -- A White Paper for the Real World"
http://www.audiosystemsgroup.com/SurgeXPowerGround.pdf

"RF Interference in Audio Systems" Power point
http://www.audiosystemsgroup.com/AES-RFI-SF08.pdf

"RFI, Ferrites, and Common Mode Chokes For Hams"
http://www.audiosystemsgroup.com/RFI-Ham.pdf

About 50 more good Jim Brown papers:
http://www.audiosystemsgroup.com/publish.htm
Kevin

leadbreath

Re: 10KHZ Ground Noise in Studio
« Reply #22 on: April 21, 2016, 05:33:16 PM »
awesome docs
f**k marlbro's and weed ill stick to smoking germanium and silicon

Whoops

Re: 10KHZ Ground Noise in Studio
« Reply #23 on: April 21, 2016, 06:32:23 PM »
Thank you,
thats great, gonna have a good read!