Would anyone know what this interferance is

  • 1
  • Question
  • Updated 1 year ago
Photo of Tony Hateley

Tony Hateley

  • 297 Posts
  • 25 Reply Likes

Posted 1 year ago

  • 1
Photo of Ria - N2RJ

Ria - N2RJ, Elmer

  • 2257 Posts
  • 884 Reply Likes
On 7120? Seems like shortwave jamming. Some governments try to jam shortwave stations.
Photo of Paul

Paul

  • 456 Posts
  • 138 Reply Likes
Tony, are you refering to the increased noise level on 40m compared with that on 20m? If so, it's so stochastic (random) that it would be hard to identify the cause just by looking at the spectrum. You could possibly 'DF' it to see 'where' it is but that won't necessarily tell you the cause.


Ria, what aspect of the signal on 7120 suggests to you that it's a jammer? It looks to my non-expert eye like a generic carrier.
(Edited)
Photo of Ria - N2RJ

Ria - N2RJ, Elmer

  • 2257 Posts
  • 884 Reply Likes
Ria, what aspect of the signal on 7120 suggests to you that it's a jammer? It looks to my non-expert eye like a generic carrier.

A few clues - the carrier is very wide. 7120 is outside of the US phone band and I haven't seen many europeans running ESSB (it seems like mostly an American thing). 
But the biggest clue is that jammers have been popping up on 40 at random times during the night and they are about that wide. 

Ria
Photo of Paul

Paul

  • 456 Posts
  • 138 Reply Likes
Thanks for the extra info Ria. Even so, it still looks to me like a carrier on 7120 and two very strong adjacent SSB signals just HF of that. I believe Tony is UK based so phone (including ESSB) in that area of the band is not unusual or suspicious.
Photo of Ria - N2RJ

Ria - N2RJ, Elmer

  • 2257 Posts
  • 884 Reply Likes
In all fairness we only see a panadapter, audio would give a better clue. 
Photo of Steve K9ZW

Steve K9ZW, Elmer

  • 1278 Posts
  • 656 Reply Likes

Nice iMac - looks like one of mine but for the £ on the keyboard!

You are going to see and hear stuff on a 6000 that doesn't get noticed on a lot of other radios.

Cool Stuff!

73

Steve K9ZW