Wes: Do the MMTTY tones match the ones (Pitch) in the K3?
Wes N7WS
=====================
Yes. MMTTY shows Mark 1275, Shift 150
K3 shows Mark 1275, Shift 170.
Here's an idea... maybe take my signal generator, perform a sweep, and
see what audio freq... if any... my K3 will key up on.
73, Joe N9OK
---------- Forwarded message ---------
From: Joe Robin <
[hidden email]>
Date: Fri, Mar 20, 2020 at 7:21 AM
Subject: K3 doesn't work in AFSK-A mode but DATA-A does work. Why?
To: <
[hidden email]>
I've reached out to Elecraft Tech Support on this issue. With their locale
on lockdown, I think they have their hands full just trying to maintain
some sense of normalcy. So I'm hoping someone here can point me in the
right direction.
I've recently upgraded my K3 with numerous "last time buy" options (KAT3A
antenna tuner, 2 KSUN3A synthesizers, and KIO3B usb board). One goal was to
remove the Microkeyer II and simplifying the setup.
What I'm finding now is that I can't make RTTY work correctly. I use MMTTY
to generate a simple warble signal, which is sent to my K3. The K3 is set
to AFSK-A, VOX enable, audio levels set correctly. What happens is that the
K3 TX LED illuminates, but nothing is heard with the Monitor (ie, thru the
K3 speaker), and there is no RF transmitted. However, when I use DATA-A, I
do hear tones using Monitor, and there is RF power.
I get the same results using either the K3 internal sound card, or
externally-generated audio (fed from my PC soundcard to Line-In on the K3).
Hoping there was a configuration issue, I factory reset my K3. That didn't
help.
It's probable this issue has been there since I first purchased my K3 new 8
years ago, but I never noticed. My MKII was used as my interface, and I was
running FSK for RTTY. I did have many configuration issues with my MKII
setup, which in retrospect might well be related to the AFSK issue that's
now obvious.
I'm suspecting this is a hardware issue. I have the 59 pages of schematics,
and am going thru them to see if I can identify the issue so I can fix it.
I would appreciate comments / suggestions / ideas to point me in the right
direction.
73, Joe N9OK
73, Joe N9OK
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