Correction; I am in the Clear!!
Since Friday I have not heard anything confirmed 120hz related except
some brief bursts Friday night which I now think were unrelated (long
explanation). It had me fooled since the signal level was similar. I am
not sure the last arc source died on its own or they fixed it with their
visit or a combination of the two.
At any rate, for now, I am 120hz in the Clear!!!
Thanks everyone for the advice, help, and support.
I will be updating my webpages with a homepage/index and share that in
case it will help anyone.
73
Chuck
W4NBO
On 10/23/21 8:05 PM, Charles Plunk wrote:
Hi Mike,
Thanks for the reply. The source *IS* still active but highly
intermittent. It actually became intermittent last weekend.
They came about 10:30am yesterday but I heard bursts from it shortly
after they left and many last night. But today its been quiet
(inactive). Thus the frustration as I know its not fixed. It is so
intermittent now maybe it will die completely on its own. I have had
120hz sources to do that in the past when I was working and had little
time to track them. Over months they would die on their own.
At any rate, right now will just monitor to see if it returns and
enjoy at least /mostly/ quiet conditions. I will email them after a
week or so of monitoring and either thank them for the work or thank
them and request they return. I just felt they should have spent more
time doing the items those of you listed and I sent them. I do not
think they possibly could have done all that in 20 minutes.
But, as you say, bottom line its mostly gone for now. I fully realize
living around 60's model power lines is a continual battle. And
appreciate the utilities cooperation/courtesy and appreciate this
group most.
73
Chuck
W4NBO
On 10/23/21 5:38 PM, Mike Martin wrote:
Hello charles, that's kind of a tough question. If they corrected
your problem it doesn't matter whether they spent 5 minutes or 5
hours. Many times I'm only there 10 or 15 minutes sometimes there an
hour but if they corrected the problem it really doesn't matter. A
loose staple on the ground wouldn't be considered 240 volts or 7,200
volts. The staple is holding the ground to the pole and the staple
gets energized by induced voltage from the primary. if they found
that staple loose, removed it and your noise is gone or if they
tighten it the noise is gone. Either way if it's gone, it's gone and
that's a good thing only time will tell. But by all means you give
them the benefit of the doubt and take their word that they've
corrected it until it comes back. Don't worry about the 7.2 KV side
and less the noise comes back. Then no matter where it is they need
to find it.
Congrats on the quiet!
Be safe,
Mike Martin
RFI Services
51 W Bay Front Rd
Lothian, MD 20711
240-508-3760
On Oct 23, 2021, at 11:37 AM, Charles Plunk <af4o@twc.com
<mailto:af4o@twc.com>> wrote:
7.2kv/240 volt system here. 20+ years of 120hz issues on and off
at this
QTH. Current source details here;
https://qsl.net/af4o/Powerline%20RFI%20QSL.net%20Webpage/Fall%202021%20Source%202.html
<https://qsl.net/af4o/Powerline%20RFI%20QSL.net%20Webpage/Fall%202021%20Source%202.html>
My current 120hz source stayed active for 2 months. Last weekend
became
inactive. Utility arrives yesterday of course with it inactive.
Before I
could get suitable clothes on, grab my HT/450mhz yagi, and going
out to
meet them the crew chief stated they found it (a loose stapled
ground
connection). I asked him did they check over the 7.2kv side (and
several
other questions) thoroughly which not much up there on that side.
They
said yes. So with it inactive, what more could I say.
I have sent them many emails from several of you edited down to the
suggestions of what they should check. Appreciate those very much.
Currently source is still active but intermittent.
So
What are the chances of the source being on the 240v side of the
pole
being its a loud s9 at 2m at ~300' and can hear at 450mhz and
portable
yagi at ~150'?
Am I correct emphasizing to check the 7.2kv side?
Should I be frustrated they only spent about 20 minutes with the
pole
after me spending hours upon hours locating it?
With it intermittent (a burst of arcing maybe 30 seconds every 10
minutes or so but very random) will it possibly cure itself thus
should
I wait before informing them its not fixed?
Thanks again for all the suggestions and excellent advise here.
Chuck
W4NBO
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