[Elecraft] K3 Filters, Shift Control and RTTY

David Wilburn dave.wilburn at verizon.net
Tue Nov 11 09:01:10 EST 2008


If the other station has AFC on in their software, they tend to wander 
around a bit.  I tend NOT to run AFC if I am S&P, as I line right up 
on them.  If I am running and there is activity around me, it is hard 
to run AFC, as my signal then wanders around.  But if someone comes up 
a bit off, or I have some room around me, I then run it. It then 
aligns my frequency with theirs.

Its a lot like CW contests, where so many do not zero you before they 
call.

David Wilburn
NM4M
http://www.nm4m.com




Ron Kenwood wrote:
> I have been playing in the WAE RTTY contest. I am mainly using the 250Hz 
> roofing filter with DSP bandwidth at 300 Hz. I occasionally use the 
> 1.8kHz filter with DSP set at about 500 Hz. In either configuration, I 
> find that I have to use the shift control to center signals in the 
> bandpass. Not sure if this is a hardware or software thing, but in any 
> case, I have two issues. One is that the minimum shift value is too 
> large to accomplish what I want to do at the narrow bandwidth, and when 
> I try to use the dual bandpass filter it appears that shift is disabled.
> 
> Am I missing something(highly likely), or do I have to request that 
> changes be added to the wish list?
> 
> 
> Ron W3ZV
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