On Thu, 26 Apr 2007 15:03:35 -0400 (EDT), Jack Brindle wrote: >If you want to break out pin 7
Yes. I use Writelog as a contest logger and have always set it up to send CW on pin 4 of the computer's serial port. I break it out of the serial cable, make an inverter/level shifter for it (a transistor and a resistor), and use that to key the K2 (and othe rigs). It works VERY well on every radio I've ever hooked it up to, including my K2's, TS850, and OmniV. With the K2, of course, I feed it through the two isolation diodes so that I can also use the paddle. The transistor inverter/level shifter is the one that Writelog shows for the parallel port. Collector to the key, emitter to key return, base thru resistor to the keying line from the computer. All this works MUCH better if you rebuild the serial cable using twisted pairs for the computer to radio part, one pair for each signal circuit. No changes to the wiring between a KPA100 and a K2. Details on my website for the serial connection. http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim Brown K9YC _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
