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Old 30th October 2001, 12:53 AM   #1
cm961 is offline cm961  Canada
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Location: Peterborough, Ontario
Hello All,

Basically I have my setup as this: The cable tv coax runs into my vcr, which runs into my amp via RCA cables. The problem is this: I get a very loud hum! Its terrible. Anyways, this only occurs when the cable TV is plugged into the vcr. If I disconnect TV, the VCR outputs no hum at all. I was wondering if I should short the cable tv earth or ground to the case of my amp, or if this isn't a good idea. Any help greatly appreciated.

Pete
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Old 30th October 2001, 07:42 AM   #2
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Default Try this web site..

Go to:
http://www.smr-home-theatre.org/Ground-Loops/

Read the whole article.
It gives a good explaination of what causes hum. Look farther down and you'll see Cable TV recommendations etc.
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Old 30th October 2001, 11:56 AM   #3
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There are small small isolation transformers available mounted on TV coax cable. Just to plug in between your VCR and incoming TV-cable. Works fine, I've got one myself. Buy from your nearest electronics supplier. Costed about 7 euro.
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Old 2nd December 2001, 03:48 AM   #4
cm961 is offline cm961  Canada
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Just wanted to say thanks a lot for the replies. The information you've provided has been extremely useful... DIYAUDIO rocks!

Pete
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