NotTaR of Television Sets : RF Interference on TV                   
 Copyright © 1994-2007, Samuel M. Goldwasser. All Rights Reserved. Reproduction of this document in whole or in part is permitted if both of the following conditions are satisfied: 1. This notice is included in its entirety at the beginning. 2. There is no charge except to cover the costs of copying. I may be contacted via the Sci.Electronics.Repair FAQ (www.repairfaq.org) Email Links Page.

     << Interference when using V.. |  Index  | Problems with ground loop.. >>

RF Interference on TV

"I have interference lines on my TV - they are particularly heavy on 2, not so prominent on 9 - one TV is on Radio Shack Color Supreme 100 (souped up rabbit ears), other is on a roof top antenna, both have coax from antenna to TV. I have HAM operator two doors away. Is there an FAQ on interference - if so where. How do I need to describe the interference pattern in order to seek help. Thanks."

The FCC had an online interference handbook, with color photos showing how different types of interference affect a TV's picture. This has vanished from the FCC Web site but is now on the Kyes TV Web site:

Another Web page on interference which includes portions that have obviously been copied from the FCC document is at:

(From: Andrew Mitchell (amitchell@sympatico.ca).)

Probably the easiest solution is to visit your ham neighbor and describe your difficulty. Amateur radio operators are licensed by federal governments (FCC) and are required as part of their examination to demonstrate a knowledge of this type of interference. It may well be that the ham is not the source of the problem and even if this is the case I'm sure he or she will be of assistance.

(From: Alan N. Alan, WDBJ-TV, KM4IG (alann@intrlink.com).)

OK, as a HAM myself, I can understand this. Channel 2 is the lowest TV channel, right above the six meter band, 50-54 Mhz. Channel 9 is well into VHF above 175 Mhz. It is possible that your neighbor operates 6 meters.

I would talk to him. First, the chances are it is YOUR equipment, and his is legal and meets FCC specs. But I would be willing to bet he will be very cooperative to help you solve your interference.

The thing to do is talk to him, calmly, and tell him about your problem. Then, schedule a time where he can transmit his gear and see if your problem exists along with his transmissions.. If it does, you can go from there. Many ham clubs have many engineers and radio and TV people in their memberships that will jump in and help you solve your problem. Again, he is probably legal, and consumer equipment is not known for it's RF resistance. Consumer manufacturers cut corners wherever they can. This includes filtering and design.

 <<Interference when using V.. | ToC | Problems with ground loop..>>