[Elecraft] CFL lamp noise

[ab2tc]

Hi,

I have a house full of CFLs, too and no noise at all. I also have a number
of fluorescent tube lamps. Most of these have conventional magnetic ballast
but a few have electronic ballasts. No noise from either of them either.

More recently I went out and bought two 60W (incandescent equivalent) LED
lamps from 2 different manufacturers. Rumor has it that some of these are
extremely noisy. But I have no noise from them either, much to my relief. 

I do have a recent noise problem that affect mostly 40m and vicinity. On the
panadapter it shows as "humps" 10-15kHz wide and spaced about 40kHz apart.
It sounds like a scratchy noise and it drifts slowly. Folks on the LP-Pan
Yahoo forum have suggested it's a washer or drier, but who is washing and
drying 24 hours a day? If it is a motor control, it must be some motor that
is running more or less continuously. Unfortunately I have a difficult time
arranging an antenna on the car with reasonable efficiency on 40m, so I
haven't been able to sniff around the neighborhood.

You can see it here:

http://ab2tc.getmyip.com/grunge.png

And hear it here:

http://ab2tc.getmyip.com/grunge.mp3


Knut - AB2TC


Bob K6UJ wrote
> Thanks for that info Jim.  I will be installing some FL's in my garage.
> I will check for RFI and get some magnetic ballasts if need be.
> Thats good to know.
> 
> 73,
> Bob
> K6UJ
> 
> <snip>





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