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People used to use the am filter for wide SSB. This was commonly called lying to the k3. And fm filter for am, same deal.
The only thing controlling your transmitted bandwidth would be microphone and transmit EQ.
On Jul 28, 2021, at 10:51 PM, Dave (NK7Z) <dave@...> wrote:
Hi,Thanks for the info, I have tried that. It shows only two filters, while I have three... I need to learn how the filter process works for adding and removing filters.73, and thanks,Dave (NK7Z)https://www.nk7z.netARRL Volunteer ExaminerARRL Technical Specialist, RFIARRL Asst. Director, NW Division, Technical ResourcesOn 7/28/21 3:38 PM, Mel Marcus wrote:
I believe that just by taping the XFIL button you can change the filer being used
*From:* Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of Dave (NK7Z) via groups.io <dave@...>
*Sent:* Wednesday, July 28, 2021 5:00 PM
*To:* Elecraft-K3@groups.io <Elecraft-K3@groups.io>
*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,
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.