Re: Cw Signal Shift with Filter Change

Posted by Julian, G4ILO on Mar 06, 2009; 6:25pm
URL: http://elecraft.85.s1.nabble.com/Cw-Signal-Shift-with-Filter-Change-tp2436825p2437308.html

KG4UFV wrote

I have encountered a problem with my K2.  When I change from Filter 1 to Filter2 in CW mode the cw signal shifts 600hz down in frequency.  Has anyone experienced this before?  

A slight frequency shift is normal, because the K2 has to shift the BFO to get the filter passband centered where you want it, and then shift the VFO the other way to compensate, but the VFO resolution on the K2 is only 10Hz or so, and the differences don't always cancel out.

But 600Hz is way too much.