[RFI] Frustration thy name is 120hz

[Mike Martin]

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, 11:37 AM, at 11:37 AM, Charles Plunk <af4o at 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
>
>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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