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Interference on one channel only

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Retroradio

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Recently channel 19 has been subject to bouts of interference. Channels 20 and up are quiet and 18 and down quiet. This only started recently.
It comes then it goes once every couple of days to for minutes to an hour plus.
Its a 9 S-unit plus of spiky interference almost static like and I swear I can sometimes hear pulse like tones deeply buried in it...only occasionally.
I find it interesting that it’s relegated to one channel.

Some, not all of the locals are getting it but no where near as bad.( were all running the same antenna....lol)
Same on either vertical or horizontal polarization.

I have eliminated RFI from the house...but do have power lines 50 feet behind the house.
The closest solar panels are a good 20 houses away.

I am suspecting data transmission on the lines...thoughts?
 
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gary123

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could be noise from a remote control or similar device on the 19a freq of 27.195
 
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Retroradio

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Yup thought of that . There’s no remote cars/planes etc... in this area. ( we have a dedicated airfield on the other side of town) Other remote devices are possible but what is the question I dont think I can answer....If it was pattern driven then a remote device would be easier to spot..ie: timed lights etc..
It sounds atmospheric but as its one frequency specific it isn’t.
Its a new sound so I have eliminated the obvious.The power lines are noisy But this is well beyond there regular annoying presence.

Thanks for the suggestion, will ponder it.
 
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Retroradio

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I checked out the harmonic frequencies of 27.195 and it hits them. I could only check a couple of them.
About the same drop off point up and down the band where it disappears.

Interesting...Anyone have any thoughts on this?
 
scanmanmi

scanmanmi

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Intermittent-that's a bad problem on a good day. Super difficult to direction find and pinpoint. You may need a directional antenna on a harmonic to find it. If it is from the utility company they are obligated to fix it. I was jamed up on 151.6 and found it's my network router!
 
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