Using a well-known circuit, I show you how to build a simple computer interface so that your logging software can send CW through your radio.
The logging software simulates someone using a straight key. It changes the voltage on an RS-232 pin and the electronic circuit uses a transistor as a switch, grounding the lines as though someone grounded the contacts of a straight key.
This interface will let you work a contest or pile-up using your logging software – without having to use a key or paddle. The circuit diagram came from the website of Scott Davis, N3FJP. Scott’s AC Log program is also featured in the video – although this circuit will work with any software that uses RTS or DTR to trigger the sending of morse code. (like Ham Radio Deluxe, etc.)
The circuit diagram: http://www.n3fjp.com/cwschematic.html
N3FJP website: http://www.n3fjp.com
Tripp-Lite USB to Serial Converter: http://www.amazon.com/Tripp-Lite-USA-…
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