I had a KXUSB version of exchange cable with the radio but it stopped working and I had to upgrade the firmware. The new serial cable from Elecraft was $29.95 USD + approximately $40 USD for Shipping to Canada. So I decided to make a cable at home.
Step One: To begin this project I bought “9 Pin DB9 Solderless Terminal Female Serial RS232 Adapter”
Step Two: I cut the not working 3.5 mm cable
Step Three: Attach the cable wires with
DB9F Connector Connects to 3.5 mm Audio Plug
pin 2 (TX to PC) ring
pin 3 (RX from PC) tip
pin 5 (ground) sleeve
The Cable is now complete and works efficiently with Kx3 Software. I am able to upgrade the firmware of the radio.
F4HHY
DB9F Connector Connects to 3.5 mm Audio Plug
This is the correct Way to connect
pin 2 (TX to PC) ring pin 2 (TX to PC) TIP
pin 3 (RX from PC) tip pin 3 (RX from PC) RING
pin 5 (ground) sleeve
pin 5 (ground) sleeve
F4HHY
This is the correct Way to connect
pin 2 (TX to PC) TIP
pin 3 (RX from PC) RING
pin 5 (ground) sleeve
Fred - VK2WS
If I wanted to make a USB to TRS cable, would it require the same connections?
Could I use a USB to serial (or a USB to TTL) convertor board and simply wire the Rx (as marked on the USB-Serial convertor board) to Ring and the Tx to Tip?