[600MRG] WD2XSH/20 receiving

[Rudy Severns]

Late yesterday I finished my new narrowband filter for 475 kHz.  Works 
great, knocks the very strong BC signals right down into the noise.  But of 
course it does nothing for  noise in the passband except to help me to hear 
what that is.  In a few days I'll post a description on my web page.

The noise in the passband (with the rx bandwidth set to USB for WSPR) is 
still about S9.  Much better than S9+50dB but still a serious problem.  Of 
course there's lots of general hash but that's actually in the background. 
The primary problem right now is a line of multiple RFI like signals spread 
across the band and on both sides.  These signals sound like something you'd 
get from a TV set, a computer or some such electronic gear.  At this moment 
I have no clue to the sources but the next order of business is to find out. 
Because they are discrete signals there is a chance they have a particular 
direction.  If so then they can be addressed with phasing schemes.  I'll 
modify my MFJ-1026 for MF and see if that's of any help. If it is then I'll 
make up a DF antenna and see what I can discover.

While I wrestle with this problem I'll continue to run my CW beacon in the 
evening and start to transmit WSPR.  Sorry I can't give out reception 
reports but you'd have to have one h... of signal for me to hear it!  One 
step at a time.

73, Rudy