[Elecraft] Upgraded K3 and MMTTY

[Richard Ferch]

If you are using AFSK for RTTY and controlling PTT via a method such as rig
control or VOX, Don's advice about only one COM port applies. The only COM
port you need is for rig control, and the KIO3B simply allows you to
replace whatever you used previously with a direct USB connection to the
radio.

However, if you are using FSK from MMTTY (or even if you are using AFSK but
have chosen for some reason to use MMTTY's PTT & FSK port for PTT control
from MMTTY), there is a second serial port involved, for FSK (and possibly
PTT) keying. The KIO3B's USB connection does not have anything to do with
this.

In MMTTY, the PTT & FSK Port that you configure under the TX tab in the
MMTTY Setup window is not the same serial port you use for rig control.
This is a separate serial port with keying circuit(s) for FSK (normally
connected to TxD) and PTT (either RTS or DTR) connected to the K3's ACC
connector. You do not use the serial port that is created by the driver for
the KIO3B as the PTT & FSK port in MMTTY.

MMTTY also offers some minimal rig control capabilities, using a serial
port configured using the "Radio command" button in the same area of the
setup window. This must be a different serial port from the FSK & PTT port.
If you are not doing rig control from some other application (such as
DX4Win), then you can use MMTTY's elementary rig control capabilities, and
for that you can use the serial port associated with the KIO3B's serial
adapter.

You also mentioned difficulties in opening the audio codec in the KIO3B.
This should show up in the list of sound cards under the SoundCard tab in
MMTTY. Note that if there is anything plugged into the Line In jack on the
KIO3B, the internal audio codec in the KIO3B will be disabled. It's an
either/or - either use the codec in the KIO3B, or use a separate sound
card, possibly inside the PC, connected to the K3's Line In jack.

73,
Rich VE3KI

On 8/19/2016 5:34 PM, Larry P. Greenberg wrote:
> I recently upgraded my K3 with the new K103B that provides a USB connection, \
> eliminates the need for an external PC soundcard and retains all of the original \
> RS232 functionality.  I have an Edgeport USB to RS232 four port box providing RS232 \
> connectivity to the K3, the amplifier, and rotator control.  It seems to be working \
> as DX4Win controls the radio, the rotator, and sends CW.  I cannot get MMTTY to \
> send RTTY or even execute the PTT function.  It seems like I have not set-up MMTTY \
> correctly.  I am looking for someone who may be familiar with the new K3 Interface \
> boards (K3s functionality) and MMTTY.  My error message is Cannot Open COM3 (COM \
> port used to control the K3 and send CW which works fine.  I cannot select \
> additional soundcards such as CODEC from the soundcard menu under set-up.
> Larry, WA9MAG