[RFI] Further data on my weird RFI problem

[AA5CT]

I might comment on how repeatable a mechanical lamp/security timer
can be, as I use one on some radio gear and I can observe to the second
on successive days when the 'gear' powers up! And it even follows
'slippage' as found here on the Texas ERCOT electric network. ERCOT
tracks the number (down to the tenths) of seconds the system is fast
or slow according to the timing-keeping national atomic clocks.

de AA5CT Jim

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On Thursday, May 6, 2021, 9:11:00 AM GMT-5, N4ZR <n4zr at comcast.net> wrote: 





While I wait for the preamp needed to use my WD8DSB portable flag to pin 
it down, I thought RFI readers might be interested in some more data.

The signal is present every 50 KHz from approximately 5000 KHz to about 
7800 KHz, strongest at around 6450 KHz.  On each of these frequencies it 
consists of a relatively strong central signal and multiple symmetrical 
"sidebands" spaced 60 Hz apart.  At the strongest frequency, it is clear 
that the every-120-Hz sidebands are stronger than those at 60-Hz 
intervals, and that their strength tapers fairly rapidly as you tune 
further from the center

The other thing I have discovered is that it is quite local.  No DF 
capability yet on HF, but If I go a mile or so away from my QTH, it is 
not audible on a decent portable SW receiver.  Tried yesterday to 
quasi-DF it, walking the neighborhood using signal strength, but with 
inconclusive results. It begins every morning at 0900:02 local time, and 
continues well after sunset, both of which tend to suggest it is on some 
sort of timer.

Do these rather unusual characteristics suggest what kind of an emitter 
I might be looking for, or must I just wait for the DF hardware?

-- 
73, Pete N4ZR
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