Video Hum Bars


Hi,

I understand there is a device that can either be bought or made to prevent hum bars from appearing becuase of a ground loop problem with the cable input. Mondial sells this device for around 100.00 (overpriced, I think)-which is a female to female jack that plugs in line with the cable cable- and then I remember someone in Audiogon had disribed taking to transformers and making your own device.

Any thoughts on how to make this unit?

Thanks
Rich
rich3549

Showing 2 responses by rwwear

The reason this happens is that you have too many paths to ground usually. It doesn't always cause problems but it sometimes does. In most cases, and I've seen many, breaking the ground on the TV cable input fixes the problem with no side effects.
You need a ground break where the coax attaches to your TV. You can get them a Rat Shack for a few dollars.