We had a spate of doorbell transformers 'go' in this housing development years
back,
the higher freqs like 10 meters were affected most, on account of the wiring
being
probably on the order of the appropriate faction of a wavelength (1/4, 1/2)
there as
opposed to say 20 or 40 meters.
Not saying that's it, but that is one account of mine that lines up with your
observations.
de AA5CT Jim
PS On doorbell transformers: They seem to last 30 some years, then the failure
mode
involves generating a lot of 60/120 Hz RFI !! These noted failures were noted
in the
spring to summer transition when temperatures in the attics begin to soar.
--------------------------------
On Sunday, August 8, 2021, 7:24:42 AM GMT-5, Pete Smith N4ZR
<pete.n4zr@gmail.com> wrote:
A (probably) dumb question: I have a severe line noise to my west. For
some reason it is manageable on 20, much worse on 15 and crippling on
10. These subjective descriptions are confirmed on my S-meter. Why
would this be happening, and does it offer any helpful clues to finding
the source?
--
73, Pete N4ZR
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web server at <http://beta.reversebeacon.net>.
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"retail" DX cluster.
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