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Article #21521Re: Define "GROUND" (& how to solve a "GROUND" loop prob)
From: Ross D. Snyder
Date: Mon, 29 May 1989 01:58
Date: Mon, 29 May 1989 01:58
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Another solution would be to install isolation transformers in the RCA cords between the receiver and amp. This would eliminate DC continuity in the lines and would prevent ground loops through the audio signal lines. Use 50Kohm:50Kohm audio transformers of good quality (like with shielding). I had a similar problem with my home stereo a year ago when I reconnected it, and an RCA plug was loose. I heard noticeable hum from the speakers, but the hum disappeared when I wiggled the RCA plugs. I was thinking about opening (disconnecting) the shield of the RCA cords at one end and mounting threaded studs with wingnuts on the back of my components, which would be connected together in a star configuration with heavy-gauge wire. Wouldn't the double ground connections established by the shields of *stereo* patch cables result in the potential for ground loops in all cases? I should cross-post this to rec.audio to give the MonsterCable fans something to chew on. :-) -Ross
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!mit-eddie!mit-amt!rdsnyder From: rdsnyder@mit-amt (Ross D. Snyder) Newsgroups: sci.electronics Subject: Re: Define "GROUND" (& how to solve a "GROUND" loop prob) Keywords: ground, loops, earth, ship, plane, audio Message-ID: <3807@mit-amt> Date: 29 May 89 01:58:49 GMT References: <3917@merlin.usc.edu> Distribution: na Organization: MIT Media Lab, Cambridge, MA Lines: 18