Are you talking about keying from WriteLog on the DTR line? If so, you need a simple NPN transistor as an inverter between the computer and the K2 key jack. I've built several using 2N4123's that I happen to have in my junk box, but any small signal NPN will do. Collector to the key line, emitter to common, drive the base through 1K ohms from the DTR line. Works on my K2, Omni V, TS850, and TS790A.
Jim On Wed, 23 Jun 2004 11:17:32 -0000, Robert McGwier wrote: >Never mind. RTFM. Level shifting required. > >Bob > > >-----Original Message----- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] Behalf Of Robert McGwier >Sent: Wednesday, June 23, 2004 9:35 AM >To: Elecraft Mail >Subject: [Elecraft] Keying question > > >Is there any special interface at all needed to key the K2 from the COM port >or can this be done directly? > >Bob >N4HY > > >_______________________________________________ >Elecraft mailing list >Post to: [email protected] >http://mailman.qth.net/mailman/listinfo/elecraft >You must subscribe to post. >Subscriber Info (Addr. Change, Unsub etc): >http://mailman.qth.net/subscribers.htm >Elecraft page: http://www.elecraft.com > > >_______________________________________________ >Elecraft mailing list >Post to: [email protected] >http://mailman.qth.net/mailman/listinfo/elecraft >You must subscribe to post. >Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm >Elecraft page: http://www.elecraft.com > _______________________________________________ Elecraft mailing list Post to: [email protected] http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
