[Elecraft] KX3 PBT

[Howard Hoyt]

I have been twisting the KX3's PBT I/II knob madly in an attempt to 
change BW or CF rapidly, but in reality when I turn it more slowly the 
function actually changes more rapidly.  Two possible explanations are 
either the encoder pulse rate exceeding the I/O refresh rate, or the 
speed with which the filter DSP can reconfigure.

I would love to be able to change CF and BW more rapidly, being spoiled 
by the instantaneous response of my old Drake R-4B's analog IF 
parametric filter.  If the speed limitation with the KX3 is indeed a 
refresh issue, is there a way to increase the I/O refresh rate for the 
PBT encoder to allow for faster filter change via the knob? Of course, 
if it is a DSP horsepower issue, it is what it is.

The overall performance of the KX3's receiver is so far superior to the 
R-4B, I don't want to use the R-4B much any more (well for that reason 
plus tube, old capacitors, size, power requirements and other issues, 
but that is another story).

Howie - WA4PSC