You guys that are more familiar with public service digital systems (fire police EMS etc) than me maybe can enlighten me. Would these sources of RFI that we track for our ham analog systems not inter
My latest one I tracked to a pole up the street. Its radiating up and down the street but fairly sure. I rarely get this lucky but it was already marked for replacement due to a weak wood pole. Lots
Thanks for the explanation Eddie. Another advantage of trunking. My thoughts were thinking about a conventional digital system such as in use by smaller agencies. In my rural county, I am not aware o
My latest power line rfi I have tracked to 2 poles within 10' of each other. One or both is scheduled to be replaced. White arrow on the street, white strip on the pole, was orange tape, and sewer li
I agree, just sounds like power line arcing. Heaven knows I have heard my share of it. Chuck AF4O In your third image, the audio spectrum, the groups (first peak of first group to first peak of next
Years ago, I built the ultrasonic from the QST article (http://www.farcircuits.net/w1rtc_notes1.pdf). Works good unless the source is masked by the hardware. I have found it is very pinpoint in natur
Oh, a tip if you do use a portable AM broadcast radio. Wrap some aluminum foil around the radio. Then you can slide that up or down the radio to use as an attenuator to tell when you get close to the
Just a quick tip that may help someone; I use free software called "Audacity" to record the suspected power line rfi and then expand it to where you can count the pulses (120 per minute/30 per 15 sec
Looking at it on Audacity, you can see regular narrow pulses of 12 per tenth of a second. Also other (maybe 4 more) wider pulses of 12 per tenth of a second. So 120hz, it looks like maybe several pow
I am considering purchase of a used or new rig with DSP under 1k. Looking for personal opinions on a specific rigs DSP's effectiveness to combat power line noise if any at all. My mode preferences ar
Long Story but will try to keep it to my point. I have triangulated my power line arc to a pole. Fairly typical 3 phase old residential but busy pole. Insulators, disconnects, lightning arresters, a
Went to the grocery waiting on replies :-). The arc is pulsing up to about s5 tick tick tick sounds like a metronome. Put the radio on AM. Only heard the tick tick as I drove by the suspect pole. Fal
Sent my util a request to replace the arresters. Will report in when I get more info. Thanks for all the replies! 73 Chuck AF4O _______________________________________________ RFI mailing list RFI@co
Local Util engineer already emailed me back. He avoided the idea of replacing the arresters. So with the intermittent nature of the arc, my only option it seems is to wait until its more consistent.
One correction. The pole I suspect does not have a transformer but the one near it does. Pole is here, you can plug this in google maps and view it. 35.247489600931196, -89.0080609481562 I triangulat
I have a magnetic loop at 14mhz that has a sharp null that I used before tracking with the 144mhz yagi. Dave - WØLEV Local Util engineer already emailed me back. He avoided the idea of replacing the
Well it reared its ugly head just a bit ago. Below is an audio recording of this evening. https://app.box.com/s/d96erssv98sluoulinzfj68pa3r6h3j4 _______________________________________________ RFI ma
Reminds me of the only complaint I have had many years ago. Three houses up i got a call and their son proceeded to cuss me out saying I was interfering with their TV. I was on 6m HSMS at 100w. He sa
While waiting on my powerline arc to return in force enough to have confidence it will be ongoing when I call TVA in, thought I would play with improving the sense antenna on my Timewave ANC-4. The 3
Much appreciate all the responses so far. I started a webpage https://www.qsl.net/af4o/Powerline%20RFI%20QSL.net%20Webpage/Arc%20Webpage.html Will add weather related log and other info as time goes