[Elecraft] Stumped: K2/100 stopped going into Transmit for digital

[Joe Subich, W4TV]

On 2021-10-07 9:56 AM, Carter Craigie wrote:

> NO red transmit LED on the SignaLink USB, nor any transmitting bars 
> show on the K2. No Problems with the receive. And the K2 responds to
> commands from the computer, such as changing frequencies and such.

The Signalink is a brain dead external sound card that generates PTT
based on the presence of audio output (built-in VOX).  If you get no
transmit LED, the audio output is not high enough to trigger the
internal VOX circuits.  Check the TX level (and output device) in
your digital software (WSJTX, DigiPan, DM780, etc.).

You will likely find that the audio endpoints have changed due to
an application and/or Windows update.  First step in trouble shooting
is *always* to do a Windows *RESTART* (not shutdown, power off or
reboot - but *RESTART*) in order to force Windows to load all drivers
fresh from disk rather than used cached versions.

73,

    ... Joe, W4TV


On 2021-10-07 9:56 AM, Carter Craigie wrote:
> Hello fellow Elecrafters,
> I am completely stumped!
> I have been using my K2/100 along with a SignaLink USB soundcard to do
> digital programs, such as PSK31, RTTY, and FT8--all with no problems, for
> years.
> After downloading and installing the latest version of Ham Radio Deluxe I
> now have NO ability to transmit.
> I have tried going back and trying Digipan, but no joy there, nor with FT8.
> I have no idea what went wrong, and I really don't think my problem has
> anything to do with downloading and installing the new version of HRD.
> I have taken my control cable (which runs from the K2 to its tuner to its
> FTDI USB-232 converter) and have used my Volt-Ohm meter to trace continuity
> in all the wiring, and everything ohmed out just as I had built the cable
> years ago.
> I know that the SignaLink USB has the correct setup, as I have been using
> the chip for the K2 which has faithfully worked for me.
> I have checked the Com Port (in this case, COM3) and made sure that I have
> all the parameters correct.
> I have disconnected all three cables going into the SignaLink USB and
> reconnected them several times, as well as having done the same on the K2.
> Nothing seems worn or improperly used.
> BUT:
> NO red transmit LED on the SignaLink USB, nor any transmitting bars show on
> the K2. No Problems with the receive. And the K2 responds to commands from
> the computer, such as changing frequencies and such.
> I am completely stumped. Any ideas for me, please?
> 73,
> Carter Craigie, N3AO
> Blacksburg, VA
> (540)250-8184
> carterwc128 at gmail.com
> Elecraft K2/100 Nr. 678