[RFI] Fwd: Power Line Noise

[Jim Brown]

Given the aural analysis from other experts Mike Martin and David 
Eckhardt (I don't remember seeing a file posted, only a screen shot), 
this is great advice.

I'll add a specific method I use for impulse noise here in the Santa 
Cruz Mountains, where homes are a bit spread out. My mobile VHF/UHF FM 
rigs and talkies have wideband RX from below the AM BC band to about 560 
MHz, with the options of SSB and AM detectors. I have both the mobile 
rig and the talkie programmed for 160 MHz, 300 MHz, 400 MHz, and the 
highest freq it will tune.

I drive around tuned to 160 MHz; as the signal gets stronger, I move up 
in frequency. When it's loud at the highest frequency, I get out of the 
car with the talkie, first with a duck and the talkie held tight against 
my belly, turning it into a half-space antenna. As I get closer, I 
remove the duck. And so on. I learned the talkie against the belly trick 
from our Chicago club's annual fox hunts, and one year won using only that.

73, Jim K9YC

On 12/30/2024 1:34 PM, Alan Higbie wrote:
> Perhaps it fades off higher in the band (in the phone portion) because your
> antenna is more responsive down in the CW segment?
> 
> Do you know what direction it's coming from? Try peaking it with your beam.
> It may be a sharper peak on higher band - like 10 meters.  I'd also try
> using your 6 meter and 2 meter beams to do the same in that direction for
> possibly even sharper peak. (set to receive on AM)
> 
> Then take a handheld VHF /  UHF radio (on AM) and walk out in that
> direction until you find the pole where it is strongest.  That may provide
> some further clues as to exactly which pole is the source.  After all . . .
> there is some specific source out there causing the problem.
> 
> Knowing which pole is the source, will help your power company crew fix it
> faster.
> 
> Please keep us posted.  That way, we all benefit.
> 
> 73,
> 
> ~ Alan K0AV