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Ground loop isolaters [message #63758] Mon, 09 August 2010 00:39 Go to next message
BigMacAndCheese is currently offline  BigMacAndCheese
Messages: 44
Registered: August 2010
Baron
A buddy was talking about these today and asked me to keep an eye out for any I may come across. I didn't say anything but to be honest I have no clue which brand would be worth picking up used. To be honest they look pretty cheap new from the many online sales sites.
Re: Ground loop isolaters [message #63771 is a reply to message #63758] Mon, 09 August 2010 11:00 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18670
Registered: January 2001
Illuminati (33rd Degree)

Easy enough to just lift a ground. The most common place I see ground loops is home theater systems connected to cable TV. A 300Ω-75Ω matching transformer serves to isolate grounds there. Just go from coax to pair and then back again, and the transformer will isolate the cable TV ground from the local earth (third-prong) ground. A lot of times, this will cure a noise problem (usually hum) by isolating the grounds, breaking the ground loop.

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