[ADXA] A52CI FT8 decode

[patw5vy at gmail.com]

Dennis, W5RZ, reported difficulty with decoding A25CI on 17M FT8.  I've got
the same issue.  In the morning (12-14Z) A52CI has been relatively strong
here on long path.  The multiple streams blend into one "blob" and I have no
decodes.  I've tried pointing east and west of the direct heading with no
change.  I've turned AGC off, NB off, etc.  Tried Fast, Normal and Deep
decode with no change.  As conditions change and the A25CI signal becomes
weaker I start seeing decodes and right before propagation ends I get a
decode almost every cycle.  During that time they seem to only hear EU and I
haven't been able to get their attention.  They are in and out right
now.just about gone for me (1512Z).  At times they are strong enough for CW
but I haven't seen them on CW yet?

 

I have A5 on 30 and 15M CW from previous activations.  Just curious if
others are seeing this destructive multipath prop?  I think FT4 would work
better during the multipath..tone spacing is wider.  You lose a few db of
sensitivity but I think the improved decode of FT4 would make up for it.
I've seen this multipath on 432 FT8 during my roving activity in VHF
contests.  FT4 usually works much better.   

 

Pat, W5VY

 

 

 

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