At 1/11/2006 13:48, you wrote:
>We then went to the apartment across the hall. No one was home, so the
>apartment Manager opened the door with his master key, and we all went in.
>The first thing we tried was unplugging the aquarium heater, since they're
>often such a terrible electrical noise maker, but the signal was still
>there. Nothing else that we unplugged seemed to make the interfering
>signal stop, until we unplugged one AC cord going to something on the
>stereo system. It was an amplified FM antenna, which was a unit about a
>foot tall. The gain control on it was cranked up to about 8 out of 10,
>causing it to go into oscillation and radiate over a wide area. The FCC
>Inspector unplugged it completely, coiled up the AC power cord, and left
>it on a living room chair with some very important-looking paperwork which
>basically said "DO NOT USE", "CONTACT US IMMEDIATELY". The apartment
>manager promised to follow up with the owner of the unit with the details
>of our "visit".
>
>The problem never returned!
I think this particular problem is rather widespread. A couple of years
ago one showed up on my 440 MHz repeater input. It was a mile away from
the input RX site. Same thing: indoor amplified antenna. Another one
occasionally shows up on my output. I've DF'd that one down to about a 4
house area but haven't found the exact house yet. Fortunately it's been
gone for a while now. I also have a user that complains about an
occasional "dead carrier" on my output when driving through a particular area.
Not very funny when you have to waste hours of time chasing these things
down, knocking on doors & explaining to total strangers that they have a
nuisance generator within their premises.
Bob NO6B
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