[TVARC] FT8 QRN

[K2PS Pete Stafford]

Brilliant!!!!  Not sure how it got turned on, but yes indeed, the notch filter got set.

 

Thanks so much, Al!

 

73, Pete, K2PS

 

From: ALLAN MATTHEWS [mailto:almatthews at me.com] 
Sent: Sunday, October 31, 2021 4:02 PM
To: K2PS Pete Stafford
Subject: Re: [TVARC] FT8 QRN

 

Notch filter?





On Oct 31, 2021, at 4:01 PM, ALLAN MATTHEWS <almatthews at me.com> wrote:



That’s interesting Pete. Does the waterfall on the rig show the same anomaly? 





On Oct 31, 2021, at 11:12 AM, K2PS Pete Stafford <psk2ps at gmail.com> wrote:



Thanks, guys.  A new important detail: seems that those bars don’t move when the frequency changes, so that would seem to rule out external causes.  Listening (with real ears!) on SSB, I don’t detect anything unusual.   I could live with the visual distortion I see for signals within the offending “bars,” but I see NO signals between about 1450 and 1650 FT8 offsets – on any band, as you can see below on a packed 15M band.  The bars themselves run from about 900-1300, and 1800-2200.  All WSJT modes show the same thing.  I’ve rebooted everything, BTW, and no change.

 



 

73, Pete, K2PS

 

From: Frank M [mailto:phrankxm at gmail.com] 
Sent: Sunday, October 31, 2021 9:50 AM
To: K2PS Pete Stafford
Cc: villages reflector
Subject: Re: [TVARC] FT8 QRN

 

Pete, I don’t see any of the QRN that you have there. 

I recall having a similar problem (but not exactly). Traced it to a faulty street light near my house.

Good luck getting to the issue.

 

Frank KA1AF 






On Oct 31, 2021, at 9:33 AM, K2PS Pete Stafford <psk2ps at gmail.com> wrote:

 

Just this morning for the first time, I noticed some strange QRN on the WSJT waterfall.  The same thing is seen on all bands, both antennas.  I show the 10M waterfall here, with little activity on the band:

 

<image001.png>

 

Here’s 20M and a bunch of signals:

 

<image002.png>

 

Note also, the nearly total lack of signals in between the noise bands.

 

Could this be an artifact of the reported solar flare?  Or am I seeing some new RFI issue?

 

73, Pete, K2PS

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