Setup a K3 for SSB, CW and RTTY in combination with a computer.

Normaly when you want use a computer and the radio there are a lot of interfacesand cabls. Microham controller, or other interfaces are used to run RTTY, to make CW or to use the computer as voice keyer. The K3 has the most build in and a few simple home made cables gives you SSB/CW/RTTY and radio read out without any box.

I use the serial port to readout the radio (bandmap),to key the radio ( CW) and the paralell port to make RTTY FSK.

		The cable is connected to a serial port and a paralell port on the computer, the other side is connected to the back side of the K3
		Left a female 9 pin sub D for the serial port and a 25 male sub D for the pararell port.
		The 9 pol sub D is connected to the K3 for serial communication and the 15 pol sub D is used to make RTTY (FSK). The cable has 8 wires
		Beside this cable you need 2 standard audio cables for RX audio (read RTTY).Connect line-out on the K3 and line-in on the computer. To use the sound card as voice keyer, connect line-out on the computer to mic-in at the K3. Plug the mic at the head set direct in to the mic at the computer.

The internal cable connections.

The connection for FSK RTTY is copied from http://mmhamsoft.amateur-radio.ca/extfsk.htm. I use TILL 111 opto coupler to prevent groud loops

CW setup: K3 CONFIG:PTT-KEY
SSB setup via you contest program
RTTY. Install the MTTY eninge and EXTFSK. K3 set FSK pol. on 0 (zero) via CONFIG:FSK POL. Set MTTY and the K3 to 1275 hz mark 170 hz shift.