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Author Topic: Weird interference on 31m  (Read 314 times)

Offline markolinux

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Weird interference on 31m
« on: December 22, 2019, 2045 UTC »
I am listening to (or trying to anyway) Radio Guinea on 9650 kHz, and there's this odd wideband RFI of some sort. I've uploaded a pic... anyone seen anything like this?

I think it's local, but not sure. If anyone else is seeing it, please reply back, so I know it's not local RFI.

73,
Mark Pettifor
Goshen, IN
EN71ao

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Offline redhat

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Re: Weird interference on 31m
« Reply #1 on: December 22, 2019, 2350 UTC »
Looks like the same wideband data we've seen recently on 43 meters.

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Offline markolinux

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Re: Weird interference on 31m
« Reply #2 on: December 23, 2019, 0149 UTC »
I also saw a different kind earlier in the day on 31m that was wideband as well. Might be they are related. Will try and post a (smaller  :D ) picture of that too.

Hmm. Been a while since I've posted over here. I need to update my signature!
SDRs:  Perseus -- HF+ Discovery -- RSPdx
Antennas:  DKAZ -- Superloop (Conti) -- Belar loop
                  -- Vertical wire -- BOG/LOG (sometimes)
SW - MW; Listening and DXing.

Offline Beerus Maximus

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Re: Weird interference on 31m
« Reply #3 on: December 23, 2019, 1706 UTC »
The #1 generator of wideband HF RFI that I have found around my house are "smart" 12v battery chargers/tenders. Specifically the NOCO Genius brand. I have a couple of these and they destroy HF with ridiculous RFI. Therefore I only use them occasionally to touch up a battery, I never leave them on a battery all of the time.

The 2nd worst generator of local RFI is undercabinet 12vdc LED strip lighting. The tiny switching power supplies they use are complete garbage.
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Offline ChrisSmolinski

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Re: Weird interference on 31m
« Reply #4 on: December 23, 2019, 2131 UTC »
Don't forget about newer KitchenAid mixers with PWM DC motors. I understand some are reporting RFI from new home HVAC systems with similar blower motors.

Chris Smolinski
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