On Sun, 10 Jan 2010 06:02:58 -0800 (PST), Tom KG3V wrote: >I will give the homebrew interface a try and see how >that works.
Before I moved to CA, I was using a K2/100 extensively for contesting. The standard serial interface worked quite well, but NOT with the standard K2 cable, which is a dog for RFI if your TX antenna is close to your rig. To solve the RFI issue, simply rebuild the serial cable with twisted pair (like CAT5). See details in http://audiosystemsgroup.com/HamInterfacing.pdf That same pdf shows the control wiring needed -- only pins 2, 3, and connector shell between computer and radio -- and pin 4 plus the connector shell to send CW. Pin 4 drives the base of the standard NPN inverter transistor through a small value resitor (a few kOhms), collector drives the key line of the K2, emitter goes to common. Again, details in the pdf. BTW -- virtually all contest loggers use the same serial and parallel connections and signals to key radios, so if you build an adapter for one logger it will work for all. Another BTW -- the computers I've used for contest logging all run on either W2KPro or XPPro on IBM Thinkpads. No issues with those OSs. 73, Jim Brown K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
