re: "I have been most successful (without spending high dollar on rfi gear)
retransmitting the noise from my station receiver to a HT"
I did that early on - used a local UHF repeater to relay the audio from
the HF radio ... I've gotten good enough with the marine DF receiver
(which I didn't have back when) that it isn't necessary any more!
The KICKER is, when these 'sources' are found that are 1.74 miles
away, they WILL be quite strong just feet away ... that's a 2nd
good indicator! As you mention, a good number of poles produce
low-level noise that isn't heard a couple hundred feet away nor
at the home station QTH.
On poles I can get within 12 inches of the 'ground'/earth wire, I
make mental note of the signal strength/RF gain control setting
on the marine DF receiver I use for each pole near the strong
'noise' maker ... correlating this later with which pole makes
'noise' at UHF using a UHF Yagi and my success level on finding
these poles is 100%. Using a bicycle as transport really cuts
down the time walking between poles to do this too, b/c, part
of my learning/training process is to repeat this exerciseover several
different days, just to satisfy MY curiosity and
desire to know I got the right pole.
de AA5CT Jim
On Monday, June 6, 2022, 9:14:33 PM GMT-5, Charles Plunk <af4o@twc.com>
wrote:
Jim, I thought the same thing. That is my best lesson learned tracking
power line rfi. Noise seems to be everywhere when out tracking in the
field. Every pole has some around here near field. To be as sure of
success as possible you must find some way to track the -correct- noise.
No fun getting the util out and your findings be wrong.
I have been most successful (without spending high dollar on rfi gear)
retransmitting the noise from my station receiver to a HT -especially-
if I can catch it with a distinctive pattern. And comparing audibly with
a tracking ht with handheld yagi and/or ultrasonic dish. Fortunately
most of my power line rfi at some point will go intermittent with a
distinctive pattern usually varying with humidity. Patience is key here.
Sorry for repeating as I know I have told this story in the past but it
really made a huge difference in my ability to track down the right noise.
Many months now 120hz buzz free :-). Well some distant stuff but NB
works fine.
73
Chuck
W4NBO
On 6/6/22 20:08, AA5CT wrote:
> Won't he be surprised when it DOESN'T cure the problem
>
> and any
> nearby sources located may not be the one creating all the havoc
> at the station QTH.
>
> de AA5CT Jim
>
>
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