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Re: Theory is correct but reality is very dangerous

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In Reply to: Theory is correct but reality is very dangerous posted by wheezer on October 20, 2001 at 20:16:13:

You concerns are genuine. My power filter, which feeds my entire AV system, has a GFI and the unit itself is properly grounded through its power cord. If I found a CATV ground isolation transformer worth a darn, I could ground the system at the amplifier through the amp's power cord without hum. I share your frustration on this topic because I have never received a clear response from anyone, except in the archives here. The best I can figure, if you float the CATV ground with a MAGIC, or similar, the CATV box's ground path would still go through interconnects to get to the amp. Since I have never seen a CATV box with a grounded AC cable, I prefer to keep it grounded in accordance with the NEC and not use a CATV ground isolation transformer. Please respond as I would like to nail down this issue, even if it means I must change my setup.

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I got the problem solved! - wheezer 04:55:49 10/22/01 (0)
Wayne,
How did you make out with testing the line and load side for voltage?
You got voltage - I got a solution.
I plan to callJensen Transformer regarding VR-1FF to see if it will help as a precaution for any future additions to the system. There might be some frequencies not evident in the TV audio section but when the Surround is finally hooked up - well they will probably know!
Their white papers theory is correct. Maybe a little simplistic but nothing wrong with that!
Let me know so we can get rid of you stray voltage!
Regards,
Mitch
Re: Theory is correct but reality is very dangerous - wheezer 21:11:30 10/20/01 (0)
Is your hum coming from the TV feeding back through any device that has a ground or is it coming in through the cable into the TV.
I guess one could say is it on the line or load side of the cable, Mine is on the load side of the cable
I'll get to the bottom with a solution and up to code!
BTW have you checked out Jensen Transformers?
Regards,
Mitch

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