The simplest way of solving this problem is to break the video ground by using an isolation transformer on the incoming cable line, before it reaches your television or VCR.

If you cannot find a 75Ω-75Ω baluns (isolation) transformer, you can easily construct one from the adaptors which probably came with your VCR and television, as shown below.

Ground Isolation Adaptor

75Ω 300Ω

300Ω 75Ω

place in-line with your cable feed, prior to the system connection

 

The assembly shown above may cause some loss of video signal

 

strength and/or bandwidth, and should be used only as a temporary

 

fix. It is useful in determining the cause of some video-related noise

 

problems, however, and costs only a few dollars. If it seems to correct a

 

problem, consult with your dealer regarding a long-term solution

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which does not degrade video performance.