Hmm. Pin 1 on a DB25 for RS-232 is protective ground. On a DB9, it's Data Carrier Detect...
This URL doesn't point to the EIA standard, but is the most practical explanation of serial connector wiring I've found: http://www.lammertbies.nl/comm/cable/RS-232.html 73 de chris K6DBG > > Might want to rethink just one pin of that. A connection from the > > computer to pin 1 of the KIO2/KPA100's DE9 will probably create a > > ground loop. Only connections to pins 2, 3 and 5 are needed. > > > > Pin 1 is the ground for the non-RS232 stuff (Auxbus, etc.). > > > > On Oct 24, 2005, at 4:38 AM, Don Wilhelm wrote: > > > > > If the Microkeyer has connections only to pins 1, 2, 3 and 5 of the > > > 9 pin > > > connector, one can safely plug it into the K2 directly. > > > > - Jack Brindle, W6FB _______________________________________________ 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
