: It sounded as though you reported that their "unintended radiation"
: extended far beyond their building into the street and into your vehicle
: - jamming your use of 440.
No, all the freqs I mentioned are ones I happen to know off the top of my
head used for wireless alarm systems. Even the 440 MHz stuff. I've never
noted RFI from one, though I suppose the electronics could cause problems
and maybe their power supplies. Many of the systems in general, however,
are very sensitive to legal radio operations. I've triggered many with a CB
running 4W into a 102" whip and many more running 100W in the Ham band using
a 12' whip. In fact, when I would visit larger cities, I'd get a kick out
of calling CQ and leaving a swath of building and vehicle alarms going off
behind me for miles, like the wake of a ship. Hilarious!
Kurt
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