[Elecraft] K3 RTTY setup with MMTTY

[Joe Subich, W4TV]

> First, I'm unclear as to whether a keying interface (simple 
> NPN 1K combo) is needed for the FSK IN and DTR? I am guessing 
> that FSK IN comes from the TXD line out from the computer and 
> DTR from the DTR out.

If you want to use MMTTY in the FSK mode, make two NPN/1K 
interfaces.  Connect one from TxD to the FSK input on the 
ACC jack and connect the other from DTR to the PTT input 
on the ACC jack.  That puts everything on one cable/plug. 

> Then under the COM Port Radio Command, I'm not sure what 
> needs to be specified. Do we chose Kenwood (like N1MM in the 
> old days) or does it require something special?

Yes, "Kenwood" works with MMTTY 1.65.  MMTTY 1.66G calls the 
protocol Kenwood/Elecraft to eliminate any confusion.  Do not 
check either 'flow control' or DTR/RTS PTT.  Since you will 
be using FSK, set the "Frequency offset" to "None" since the 
K3 reports the mark frequency (in FSK D or AFSK A). 

73, 

   ... Joe, W4TV 
 

 



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Julius Fazekas
> Sent: Sunday, January 04, 2009 11:16 AM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] K3 RTTY setup with MMTTY
> 
> 
> I'm running into problems interfacing my K3 with MMTTY on transmit.
> 
> First, I'm unclear as to whether a keying interface (simple 
> NPN 1K combo) is needed for the FSK IN and DTR? I am guessing 
> that FSK IN comes from the TXD line out from the computer and 
> DTR from the DTR out.
> 
> Then under the COM Port Radio Command, I'm not sure what 
> needs to be specified. Do we chose Kenwood (like N1MM in the 
> old days) or does it require something special?
> 
> How easy is it to damage the RS-232 / AUX I/O on the K3, if 
> one makes the wrong connection?
> 
> Frustrated in Tennessee,
> Julius
> 
> Julius Fazekas
> N2WN
> 
> Tennessee Contest Group
> TnQP http://www.tnqp.org/
> 
> Elecraft K2/100 #4455
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