Or it could be that one oscillator pulls the other off frequency?
Maybe the noise is still there, but at another freq.? Most of my
stuff that generates raspy spurs is very sensitive to line voltage,
among other things.
A random thought!
73 Martin AA6E
On 3/9/06, doc <kd4e@verizon.net> wrote:
> 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!
>
> --
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Thanks! & 73, doc kd4e
>
>
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> KD4E =====================================
> West Central Florida
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--
martin.ewing@gmail.com
http://blog.aa6e.net
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