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Discussion Starter #1
Anyone have any experience with this?

http://www.radioshack.com/product/i...=ground+loop&kw=ground+loop&parentPage=search

I had one lying around from an older car stereo installtion...When I first hooked up everything to run REW I was getting a hum thru my speakers and sub whenever the PC soundcard output was connected.

I put this in line between the Soundcard output and AVR input..it did remove the hum.

But I am curious if this product will cause problems with the measurements from REW.

I ask because at $15.00 it is WAY cheaper than the other "hum" illimination devices I have seen referenced on these forums.

Thanks,
 

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Cheaper isolaters tend to have poor low frequency extension and can have high distortion. Try connecting it in a loopback on your soundcard and make a measurement to see what effect it is having, can also use the Spectrum analyser to see what effect it has on distortion measurements.
 

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I would never put a choke filter in the signal...just float the ground with a cheater plug.
Using a cheater plug is a great way to kill someone should you ever have an electrical short and go to diagnose the problem without remembering that your chassis is no longer grounded.

http://www.hometheatershack.com/for...at-solution-do-folks-use-dreaded-bfd-hum.html

The above thread should resolve any buzzing/hum you have that is being caused by ground loops - in a far more safe manner than cheater plugs.
 

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The use of a cheater plug is cheapest and best way to limit hum without signal loss, I suppose anything could happen but out of thousands and thousands who have used these I have never heard of any death or even injury..... any unit should be fully unplugged for any connection or service projects.
 
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Discussion Starter #6
Althought a loopback measurement using the Isolator did not look any different than without.. I just got some cheater plugs instead...needed one for the PC and Monitor that I was using to run REW on. No hum...and no questionable device in the loop.
 

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Dont worry about it.....there are tens of thousands of these in use this very minute and I have never heard anyone have a major tragedy because of these units.
 
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