[CQ-Contest] 40m to 20m interference

[donovanf at starpower.net]

Hi Bill, 


Please describe the interference you're experiencing, you described 
it only as "a lot of interference" 


Is the interference only directly on the second harmonic of the 40 meter 
transmitter or does it have buzz sidebands that cover much of the 20 meter 
band? 


73 
Frank 
W3LPL 




----- Original Message -----

From: "William Hendrick via CQ-Contest" <cq-contest at contesting.com> 
To: cq-contest at contesting.com 
Sent: Wednesday, January 22, 2020 11:00:29 PM 
Subject: [CQ-Contest] 40m to 20m interference 

I have a lot of interference on 20m when TXing on 40m even with BPF on each K3 running 100w. A 23' shorted stub at the 40m rig doesn't seem to help. Both antennas are Butternut verticals about 150' apart. Am I asking too much for the filters with the same antenna polarization and spacing? 
Bill, N0AC 
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