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Posting-Version: version B 2.10.1 6/24/83; site mgweed.UUCP
Path: utzoo!watmath!clyde!cbosgd!ihnp4!mgnetp!mgweed!rjr
From: rjr@mgweed.UUCP (Bob Roehrig)
Newsgroups: net.ham-radio
Subject: TV/Intercom interference
Message-ID: <16003@mgweed.UUCP>
Date: Sat, 23-Mar-85 08:24:36 EST
Article-I.D.: mgweed.16003
Posted: Sat Mar 23 08:24:36 1985
Date-Received: Sun, 24-Mar-85 04:04:26 EST
Organization: AT&T Consumer Products - Montgomery Illinois
Lines: 15


The few FM intercoms I ran across operated near the 160-9190 kHz range.

Sounds like the problem could be harmonics of the TV's sweep circuits.

I would suggest a brute-force line filter on the TV set's power line.
I don't know if wrapping the TV power cord around a ferrite rod would
help or not. My RCA XL-100 has a transformer-type power supply but the
chassis is connected to one side of the line cord since the transformer
is also used as an autotransformer. I measured the horizontal sweep
signal being fed back into the power line with a Stoddard VLF rcvr
and it was quite high....

Bob K9EUI