Re: K3 question

Dave (NK7Z)

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?
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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