As per the K3 Manual Rev D10, Page 70
ERR TXF 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, 6 kHz
for AM, and 13.0 kHz for FM).
That being said it could be a mis-configuration, or possible Corrupt firmware
in the radio (Speculation from reading past messages)
From: Bob Gibson via Elecraft <elecraft@mailman.qth.net>
To: "elecraft@mailman.qth.net" <elecraft@mailman.qth.net>
Sent: Saturday, December 31, 2016 5:40 PM
Subject: [Elecraft] k3 problem
Hi Fellows.. I have a friend that I'm trying to help.. he is 85 years old and
has a k3. He turned on the radio today and got a err exf message... or he may
have said err txf. not sure.. I told him I would try to help him.. he is in
OKLA and I'm in Florida so it is not easy.. Can someone please tell me what the
message means.. and I will call him back. He is a very dear ham buddy of 60
years. Thanks 73s Bob W5RG
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