The test was copied in Seattle beginning at 0500.  The transmitted 
signal was quite good at first on 6.7925, about 25-30 db above the noise 
floor, with a the echo almost as strong.  As time went on, the echo 
became less noticeable, especially after 0530.  The transmitted signal 
became gradually weaker after 0540, and was maybe 10 db above the noise 
by 0600.  I could actually watch it get weaker on the SDR display.  I 
switched to 7.4075 at 0600.  The transmitted signal was there weakly, 
but the low signal strength was probably due to ionospheric conditions 
rather than anything done at the transmitter --- I think the 
Alaska-Seattle path was becoming less viable, judging from what I saw 
and heard on 6.7925.  I didn't hear the echo at all on 7.4075.
I found reception was best using the cw mode.

Bruce in Seattle
SDR-IQ receiver, slightly broken K9AY antenna


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