K3 RTTY Com port issue

[James Hall-2]

Hello All:

I'm really enjoying my new K3 #616. I've been getting everything hooked up
and exploring all the possible solutions to typical problems. Here's one
that I haven't seen answered here -

To run RTTY with MMTTY requires use of the one Com port on the radio unless
you choose to use VOX control. This works quite well until something like an
APRS burst kicks in and sends the transceiver into transmit ! If you run a
logging program - mine is LoGic 8 - it uses the Com port to control the
radio or just put in the frequency information when you make a contact.
Running BOTH programs takes 2 com ports. Now, if I use a program like MixW,
this CAN use one Com port is you stay with AFSK. I have not yet run a cable
for FSK to a separate Com port.

Is there any slick way to avoid the Com port conflict ?

I DO plan on upgrading my interface situation with a microHAM device, so
this is probably an academic question. I would just like to hear what others
have figured out ! :)

73, Jamie
WB4YDL

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[Greg - AB7R]

Hi Jamie,

You can use the RS232 for rig control, and PTT/CW if you set it up
correctly.  But you cannot use it for FSK.  To key FSk you must build a
simple interface from a COM port to the ACCY connector.  Se the AA5AU RTTY
website for the interface.  Its a simple transistor and resistor...thats it.
For AFSK,  All you need is the RS232 port for rig control and PTT.

73
Greg
AB7R


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]]On Behalf Of James C. Hall, MD
Sent: Sunday, April 06, 2008 8:29 PM
To: 'Elecraft Mail Reflector'
Subject: [Elecraft] K3 RTTY Com port issue


Hello All:

I'm really enjoying my new K3 #616. I've been getting everything hooked up
and exploring all the possible solutions to typical problems. Here's one
that I haven't seen answered here -

To run RTTY with MMTTY requires use of the one Com port on the radio unless
you choose to use VOX control. This works quite well until something like an
APRS burst kicks in and sends the transceiver into transmit ! If you run a
logging program - mine is LoGic 8 - it uses the Com port to control the
radio or just put in the frequency information when you make a contact.
Running BOTH programs takes 2 com ports. Now, if I use a program like MixW,
this CAN use one Com port is you stay with AFSK. I have not yet run a cable
for FSK to a separate Com port.

Is there any slick way to avoid the Com port conflict ?

I DO plan on upgrading my interface situation with a microHAM device, so
this is probably an academic question. I would just like to hear what others
have figured out ! :)

73, Jamie
WB4YDL

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