On 5/26/2024 11:23 PM, AA5CT wrote:
Another possibility - aquarium heater? One of those jobbies that
clamps over the edge of the
aquarium in a glass tube maybe an inch diameter and 4 or so inches long.
I did once track down one of those, but it had the characteristic
spectrum of a switching supply. This one emits absolutely flat broadband
noise, more like a spark gap. It is on for about 1 second every 4
seconds. I'll do some more tracking today.
73,
Scott K9MA
--
Scott K9MA
k9ma@sdellington.us
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