[Elecraft] K3 RTTY - PSK D

[Don Wilhelm]

  Arie,

You will have to ask Larry Phipps if that MMTTY stream is implemented in 
LP-Bridge.

RTTY via DTR is possible, but would require the "one transistor keying 
circuit" to drive the PTT-IN pin on the K3s ACC connector.  Of course, 
LP-Bridge may or may not support DTR through its interface.

73,
Don W3FPR

On 1/22/2011 5:52 PM, Arie Kleingeld PA3A wrote:
> Thanks Rich, clear answer.
>
> Well...
>
> The idea was to use LP bridge.
> Send the RTTY keying via a com-port from MMTTY, and control the rest of
> the K3 via another com with N1MM logger. Since there's only one cable to
> the K3, all signals should run  over the same cable, just like the
> combination of rig control and cw keying over DTR.
>
> I donot know whether it would work, but if it would, then K3 is up for a
> new menu item: RTTY via DTR   :-)
>
> 73, Arie PA3A
>
>
>
> Op 22-1-2011 23:38, Richard Ferch schreef:
>> Arie,
>>
>> I assume you are asking whether it is possible to use the RS232 port to
>> send FSK RTTY in FSK D. If so, the answer is yes. Below are three
>> theoretically possible methods - only the third one works, and only from
>> a limited selection of software, but it is possible.
>>
>> The K3 does not accept direct ITA2 (Baudot RTTY) FSK keying on DTR or
>> RTS, and even if it did, there is no software that I know of that would
>> be capable of sending FSK using the same serial port as is used for
>> radio control.
>>
>> The K3 can accept Morse code input and convert the Morse code to ITA2
>> RTTY in FSK D, but only from its internal keyer (either from paddles or
>> from one of the memory keys on the front panel). The CW-to-DATA
>> converter does not accept CW from an external straight key input, from
>> an external keyer such as a Winkeyer, or from DTR or RTS on the RS232 port.
>>
>> However, there is a software command that you can use to send ASCII text
>> to the K3 to be transmitted in FSK D. It's the KY command (see the
>> Programmer's Reference). I believe that the K3 Utility and G4ILO's KCOMM
>> software can use this command, but most other RTTY software (such as
>> MMTTY) cannot.
>>
>> So, by using KCOMM or the K3 Utility you can send FSK RTTY from the K3
>> without an FSK keying circuit connected to the AUX connector.
>>
>> 73,
>> Rich VE3KI
>>
>> PA3A wrote:
>>
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