[RFI] My RFI battle....

[Tom Thompson]

Hi Ken,

Looks like you are making progress.  If your loop is not sensitive 
enough, you might try building one of mine.  The big loop is sensitive 
enough when tuned to give a good signal when the noise is about S-7 on 
my dipole.

Good luck,

Tom   W0IVJ

On 3/22/2014 1:45 PM, Kenneth G. Gordon wrote:
> Thanks, Tom. Listening to your recording, the noise from those 
> grow-lights as shown on your recording is not the same as what I am 
> experiencing, although I HAVE heard something very similar, if not 
> identical, to it at intermittant intervals. I am still suspicious.
>
> To me, "my" noise has a distinctly 60 Hz component. I watched it for 
> an hour or so on Spectran, and found two distinct "bands" very near 
> the lowest end of the trace. I wish there was a way within Spectran to 
> expand the lower end of the trace while ignoring the higher frequencies.
>
> I then set up my NM-20B and started trying to DF it. This turned out 
> to be more difficult than I had anticipated, since with the loop in 
> the circuit, the noise is not strong enough in the 80 meter ham band 
> to give me a reliable indication.
>
> However, when I tuned down around 300 kHz or so, it turned out to be 
> quite strong, and from my back yard, I got a single, very clear, "DF" 
> on it which is about 145 degrees true from my location.
>
> We marked it on our map, which is centered on our address.
>
> As soon as my wife returns with the family van, my oldest son and I 
> will drive around trying to get a few more "angles".
>
> Thank you very much for the link to your very informative website too.
>
> vy 73,
>
> Ken W7EKB