You took the words from my mouth Jim... I was going to suggest just that.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 12/30/24 14:43, Jim Brown wrote:
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
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