[Elecraft] K3 Firmware Bug

[Chad WE9V]

One other thing to check if you haven't already solved this issue is
the FLTX parameter in the CONFIG menu:

FLTX{md}     Default:  FL1 (all modes)
Used to specify which crystal filter to use during TX. {md} =
CW/SB/AM/FM. Choose filers with bandwidths as follows: SSB, 2.7 or 2.8
kHz (also applies to data); CW, 2.7 or 2.8 kHz; AM, 6 kHz; FM, 12 kHz
or higher. Note: If you're using a 2.7-kHz 5-pole filter for SSB
transmit, you can optionally fine-tune its FLx FRQ parameter to
equalize LSB / USB transmit characteristics. Monitor your signal on a
separate receiver, using headphones.

Chad WE9V

On Mon, Jul 14, 2008 at 12:10 PM, Dr. James C. Garland
<4cx250b at muohio.edu> wrote:
> 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
>
>
>
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