I took these four PowerSDR screenshots while working FT8 at 14.074. I noticed a progression of RFI showing up on the waterfall moving up the 20m dial. Any ideas?
Date: July 31
Time: UTC 20:27 (1:28 Pacific)
Transmission running up the 20m dial
Transmission running up the 20m dial
- Attachments
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- fourth screenshot
- SDRScreenSave__DIGU_14.179000MHz_7-31-2019 1_22_31 PM.jpg (89.51 KiB) Viewed 29143 times
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- third screenshot as RFI moves up the dial
- SDRScreenSave__DIGU_14.163500MHz_7-31-2019 1_22_00 PM.jpg (96.97 KiB) Viewed 29143 times
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- second screenshot
- SDRScreenSave__DIGU_14.143000MHz_7-31-2019 1_21_16 PM.jpg (125.83 KiB) Viewed 29143 times
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- firstscreenshot as RFI moves up the dial
- SDRScreenSave__DIGU_14.111000MHz_7-31-2019 1_20_05 PM.jpg (179.43 KiB) Viewed 29143 times
Re: Transmission running up the 20m dial
Here's a bunch more screenshots as the RFI took another turn as I was typing out the previous message.
https://photos.app.goo.gl/Ht9fmezkPfHRuY5J8
https://photos.app.goo.gl/Ht9fmezkPfHRuY5J8
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ke9ns
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Re: Transmission running up the 20m dial
looks like someone was transmitting a signal of some kind, and started turning his tuning knob up the band.
Just a guess.
Darrin
Just a guess.
Darrin
Creator of PowerSDR KE9NS v2.8, based on the Flex Radio PowerSDR v2.7.2 software.
Flex-5000, LDMOS and Titan Amps, G5RV, and Mosley TA-33 Junior
Flex-5000, LDMOS and Titan Amps, G5RV, and Mosley TA-33 Junior
Re: Transmission running up the 20m dial
I had a made in China switched mode wall wart that made a very similar pattern. I'm storing it at the local landfill now..