[Elecraft] K3 w/KIO3B has confusing RTTY transmit behavior

[Richard Ferch]

Joe,

In AFSK A, the audio Mark frequency you choose in the software should match
(or at least be reasonably close to) the setting of the K3's PITCH control.
This is especially important if you have the CONFIG:AFSK TX setting set to
FIL ON (which is recommended). By any chance were you using a Mark tone in
the software that was different from the PITCH setting in the radio?

73,
Rich VE3KI


N9OK wrote:

Hi, I've recently upgraded my K3 with numerous upgrades including a KIO3
Bboard. I've successfully configured most of what I need but RTTY has been
a problem.

What I see is that I am able to transmit power in RTTY mode if my K3 is set
into *DATA A* mode. If I set my K3 to *AFSK A* mode, the radio has the
appearance of transmitting in RTTY mode but there is no power. IE, TX
illuminates, the ACL meter moves. But Monitor is silent and there is no RF
power. MIC gain is set the same for both modes. VOX is set for both (not
PTT).

The problem first showed up in DXLAB WinWarbler. However, I've confirmed
the exact same problem occurs when I am running a stand-alone MMTTY
executable.

I realize that I could use an external FSK interface. But I"m looking for
asimple setup, and the documentation I've seen indicates that I should be
able to obtain output power using *AFSK A* mode.

It appears to me that there is an audio routing issue in my K3. However,
that seems unlikely, as others would have reported the issue and it would
have been corrected. What I'm hoping is that there is a simple setup issue
that someone can direct me towards.

Any ideas would be extremely appreciated.

73, Joe N9OK