diyAudio (
-   Power Supplies (
-   -   "Ground Loop" in Snubberized PSU *fixed* (

Redshift187 16th March 2012 12:46 PM

"Ground Loop" in Snubberized PSU *fixed*
So I accidentally found the cause of my "ground loop" between my media computer and my chip amp last night. My general setup was a snubberized PSU (15mF caps || 0.1uF caps || 10R + 0.1uF caps), connected to the amp by a 3-wire 2m long umbilical. I had been reading that using small capacitance before an inductive cable can cause problems, so I removed everything but the 15mF caps. When I turned it on, all hum from the PC connection was gone!

The hum had been driving me nuts, because my switch box has all the grounds permanently connected, so I was getting it regardless of which source I was listening to unless I unplugged the audio cable from the PC.

gootee 17th March 2012 11:44 PM

So did you try re-installing the 10R + 0.1 uF to see if the hum is still gone?

Redshift187 18th March 2012 01:34 AM

No, sorry. I'm satisfied with it now, and I'll probably leave it this way for a long time.

All times are GMT. The time now is 09:08 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 18.75%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio