Tom Rauch wrote:
>> > I turned on a second compact fluourescent light while
>> > listening to my shortwave radio, the first caused RFI,
>> > the second CANCELLED it!!
>> >
>> > But the first only caused RFI in the same room as the
>> > radio, the one in the other room had no effect on the
>> > radio by itself.
>
> It's very easy obvious what happened when we work through
> this.
>
> 1.) Only one light makes noise, he stated that.
>
> 2.) The second lamp that does not make noise, when placed
> across the power mains, reduced noise from the only RFI
> generating lamp.
>
> The can only be one thing happening. The second lamp is
> loading the line and changing something so the power lines
> are detuned for noise (so it is a less efficient antenna or
> less well coupled to the RFI generating lamp).
>
> At my old house in Conyers, I had bad noise coming in on the
> power mains. The noise was generated in my neighbor's house.
> What I did was build a bypass capacitor with two 120VAC
> rated .01uF capacitors, each one tied from one side of the
> line to the safety ground, into a plug.
>
> I just moved that plug around to different outlets until I
> found one that detuned the power lines, and made the noise
> radiating from the lines in my house disappear. The noise
> virtually vanished even though I'm positive the source of
> noise several hundred feet away still remained.
>
> It's almost certain a the same thing is happening.
>
> 73 Tom
Tom,
You are amazing! Thanks for the answer to a paradox
wrapped in a puzzle twisted into a conundrum ... or
however that wonderful phrase goes!
--
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Thanks! & 73, doc kd4e
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KD4E =====================================
West Central Florida
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