[Elecraft] K3 - Another push-to-talk question

[Don Wilhelm]

  Doug,

The K3 is capable of detecting and using DTR and RTS to operate either 
the KEY or PTT.  See the CONFIG: PTT -- KEY menu item.

There is one downside to using these inputs (it also applies the the 
"simple keying circuit" in many digital help files).  If the computer is 
booted while the K3 is turned on, those lines will become momentarily 
active.  Just remember to put the K3 in TX TEST before booting the computer.
Once the computer has finished its com port tests, there is no problem.


73,
Don W3FPR

On 1/13/2011 9:10 AM, Doug VE3VS wrote:
> I have been enjoying operating my K3 for several months. One of my interests
> includes RTTY.
>
> I use the latest MMTTY software (AFSK), have the two audio lines connected,
> and use VOX to operate this mode. At the same time, the serial cable from
> the computer to the radio remains connected.
>
> Question - Is there a set-up that will allow the computer to signal PTT
> through the serial cable in order to transmit the RTTY tones, rather than
> enabling the VOX switch?
>