Re: K3 question

Mel Marcus

I believe that just by taping the XFIL button you can change the filer being used


From: <> on behalf of Dave (NK7Z) via <dave@...>
Sent: Wednesday, July 28, 2021 5:00 PM
To: <>
Subject: Re: [Elecraft-K3] K3 question
I thought someone at Elecraft mentioned a way to use the FM filter under
SSB at some time in the past.  That was many years ago, Is there a way
to do this?

73, and thanks,
Dave (NK7Z)
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 7/28/21 12:21 PM, Nolan - KI5IO wrote:
> [Edited Message Follows]
> On Wed, Jul 28, 2021 at 02:09 PM, Israel Banini wrote:
>     My K3 and P3 was working fine until the K3 starred showing "ERR TFX"
>     I tried search the internet and one place shows it is caused from
>     using the wrong filter for the mode. Another place referenced it
>     being a software error. Can some please help me with this error?
>     Thanks
>     Israel
> Israel,
> That error is noted in my K3 Owner's Manual on Page 70.
> *ERR TXF (not tfx)  Invalid transmit crystal filter bandwidth*
> *The crystal filter selected for TX (with CONFIG: FLTX) is either too
> narrow or too wide. You must specify a filter
> that is 2.7 or 2.8 kHz wide for CW/DATA/SSB, 5 kHz for AM and 13.0 kHz
> for FM.*
> I suggest using the K3 Utility to check the settings of your installed
> filters.  Fred Cady's User Guide for the K3 & P3 (3rd Edition)
> has a good write-up on the K3 Utility and filter setup starting on Page 24.
> --
> -
> 73  -  KI5IO - Nolan K.

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