[Elecraft] K3: KRX3 question

[Brett Howard]

Being tha t it was mentioned that best responses seem to be with a
roofing filter wider than 300Hz and then he mentioned the "250Hz" filter
wouldn't you deduce that he meant the 370Hz filter which Elecraft calls
250Hz?  I mean maybe I'm jumping to conclusions here but that was pretty
clear to me.


On Mon, 2008-07-07 at 15:27 -0700, Bill W4ZV wrote:
> 
> 
> Joe Subich, W4TV-3 wrote:
> > 
> > 
> > Bill, 
> > 
> >> David you may be suggesting that "in theory" but I would pay
> >> *close attention* to what W0YK says.  Ed wins many RTTY contests 
> >> including several current world records from P49X, and results 
> >> sometimes speak louder to me than theory (and I'm an engineer 
> >> if that means anything).
> > 
> > Ed and I had an extensive off-line discussion concerning the K3 
> > filter options and RTTY.  We both made multiple measurements of 
> > the composite bandwidth (roofing filter, DSP and dual passband 
> > filter) with several settings.  The consensus is that the 200 Hz 
> > DSP settings work as long as the roofing filter is more than 250 
> > Hz wide.
> > 
> 
> That's interesting since there isn't a 250 Hz roofing filter.  There's a 370
> Hz and a 224 Hz, but no 250 Hz.  What did you use for the 250 measurement
> above or is that a calculated result?  At any rate, I'll defer to Ed since
> he's forgotten more about RTTY than I'll ever know, as his contest results
> demonstrate.  ;-)
> 
> 73,  Bill
> 
>