Hi,
We have a club station at a museum and are chasing down RFI (KB1BSM). I threw
every breaker in the building with someone watching the panadapter. It didn’t
kill the particular noise we are chasing, which shows an S9 harmonic about
every 34khz on 20m.
Then someone said “we have an ADT security system with its own battery backup.”
They think they can call ADT and get them to remotely shut it down temporarily
for a test, but I’m a little skeptical… if they are talking to it remotely,
it’s not really dead is it? I tried to get a model number but all I see is a
red metal lock box with a little ground plane antenna, about 6” tall. I
suspect it’s a cellphone antenna. I don’t expect that UHF radio is causing us
problems on HF, but the system of sensor could be noisy.
Anyway, my question for the group, are ADT security systems a known culprit for
RFI?
Thank you,
Joe K1VW
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