[Lowfer] WM with QRM

[Michael Sapp]

Mike & All: A few evening captures with some local (?) interference. Power line noise is also especially adverse this evening. I even tried a new 4Khz high pass filter

that apparently has little or no ability to suppress it.  I had a hunch that suppressing the collection of 120Hz harmonics I have locally that are individually about 30dB out of the noise

each were collectively a potential issue at my mixer......apparently not.  The 4kHz HPF tested out reasonably well on the HP SLM.  It just does not help the situation....

Very good signal level at 0330 ~ 0400 UTC from WM. Just try to ignore the wandering carrier.  Using my 500kHz LPF to allow for WSPR2 on 630m to run at the same time.

https://www.dropbox.com/s/3gybuk9dxdo5n3p/capt00076.jpg?dl=0

https://www.dropbox.com/s/pxnyvz2od4ubpo3/capt00077.jpg?dl=0

https://www.dropbox.com/s/i95vx47spu5gt1q/capt00078.jpg?dl=0

Good work Mike, perhaps the morning review will have more to offer....

73, Mike wa3tts