[Elecraft] K3 doesn't work in AFSK-A mode but DATA-A does work. What's broken?

[Jim Rhodes]

I have seen several different people make suggestions (often the same ones
others have suggested) but I have not seen anyone with a similar setup tell
what their experience is. I do have a similar setup but am not currently
living near home due to temporary work location.  I will be home over the
weekend and will try to duplicate the issue. I have always used FSK when
running RTTY but use DATA A of course when using FT modes so I have no
comparison until I try AFSK in RTTY.  K3 is currently boxed up since
returning from a portable op, so will attempt to find time to set it all
back up and give AFSK a try. (Why do we call it "wireless"?)

On Fri, Mar 20, 2020 at 8:06 PM <gt-i at gmx.net> wrote:

> Joe,
> Have you selected LINE-IN in the MIC-SEL config-menu?
> 73 Gernot DF5RF
>
> Am 20.03.2020 um 13:40 schrieb Joe N9OK:
> > 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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-- 
Jim K0XU
jim at rhodesend.net