[Elecraft] K3 Attenuation on Receive of 20 meter band only problem.

Bill Frantz frantz at pwpconsult.com
Sun Mar 3 14:34:12 EST 2013


In the NAQP RTTY contest I had a similar issue. My computer was 
decoding RTTY quite fine on every band but 15 meters. The first 
time I tuned a station on 15, the tuning indicator was right and 
the station was strong, but no decode. At least I knew that 
RTTY, unlike PSK, isn't symmetric. I turned on "Reverse" in the 
computer software and got decode. OK, it worked. I didn't try to 
find out why until later.

What I found was that the K3 was in Data A mode on 80, 40, 20, 
and 10 and in AFSK A on 15. For some reason the K3 was using 
different side bands in the two modes. Reading the manual, AFSK 
A is probably a better mode for that contest because of the 
duel-tone RTTY filter.

I never did get the K3's RTTY decode to work for me. However 
decoding on the computer is an advantage because I can copy 
calls directly to the logging program and my dyslexia doesn't 
have a chance to swap the letters. :-)

Cheers - Bill, AE6JV

On 3/3/13 at 9:13 AM, k6limaecho at gmail.com (Rick Prather) wrote:

>Lots of interesting options on the radio that are band 
>specific.  Sometimes it's hard to keep track of but I bet you 
>won't miss this one next time.  I know it's the first thing I 
>check after missing it once!

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