[Elecraft] K3 Firmware Bug

[Dr. James C. Garland]

Hi All,

 

I'm new to this list and apologize if this has come up before. I just
assembled my new K3 (#1217, firmware 2.11, DSP firmware 1.81) and noticed a
bug in the filter selection routine.

 

I have filters in FL2 (2.7 KHz), FL3 (1.8 KHz), and FL4 (0.4 KHz).  (I'm
saving the FL1 slot for an eventual AM 6 kHz filter.) Sometimes, in SSB
mode, the K3 will try to select the K1 filter (which is turned off) at
bandbass settings above 2.7 kHz, making the receiver go dead. At other
times, it (correctly) keeps the FL2 filter activated as I widen the DSP
bandwidth and seems to know not to select the FL1 filter. If it's
erroneously trying to select FL1 as I widen the bandpass, I can enter and
then exit the CONFIG mode, and then it will start working right. I haven't
explored this problem fullly, but it's clear the automatic filter selection
subroutine isn't working properly.

 

I'm finding that the K3 is a neat transceiver, with lot's of cool features.
The assembly went smoothly (it's amazing how all the holes line up
perfectly), though I found a few errors in the manual and errata sheets.

 

73,

Jim Garland W8ZR