Heavy QRM on 10.116

Heavy QRM on 10.116

MI0WWB (30CW367) 18 Oct 2023 19:04

Tonight, 18th Oct, there was heavy QRM on 10.116 which wiped out that frequency and a bit either side. It appeared at roughly 10 minute intervals and last for two to three minutes in duration. The noise also seems to follow a set pattern a fluttering noise, going up and down, changing to a buzz and finally a higher pitched tone before disappearing.

Anyone know what it is?

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Will de mi0wwb

Re: Heavy QRM on 10.116

M0AWN 19 Oct 2023 11:37

It's there again ( 19th Oct 11.35 UTC ), stretching from 10.113 to 10.116
Very annoying !

Re: Heavy QRM on 10.116

MI0WWB (30CW367) 19 Oct 2023 21:04

I wasn’t on air at this time, but if it was the same as yesterday, then I understand it was a RTTY transmission. Not in the spirit of amateur radio, right on the QRP portion of the band.

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Will de mi0wwb

Re: Heavy QRM on 10.116

G4OJW 28 Sep 2024 10:29

Not sure from your description if it was some type of OTHR (Over The Horizon Radar) widely used on 30m from places including Cyprus, Australia, China, Russia, or a wide band data transmission. If it is not from an amateur station then all sorts of strong wide band data ARE allowed on 30m from the Primary users of the band: Fixed Service. An example of this is DDK9 which is continuous but there are many others that come and go.