Jim, I could not assure anyone that the Signal Ground (pin 5) is connected to the shell of the DB9 in each and every computer or USB to RS-232 adapter. In fact I am holding an adapter right now that has no continuity between pin 5 and the shell. That adapter will not work with your suggested connections because there is no signal return path. What about those who use plastic bodied connectors? It will not have a return path through the shell for those either.
The signal return path for RS-232 must always be on pin 5 - whether the shell is grounded or not, it will always work. 73, Don W3FPR On 6/7/2011 2:35 PM, Jim Brown wrote: > On 6/7/2011 9:06 AM, Brian - N5BCN wrote: >> For UNSHIELDED twisted pair CAT5: >> The K2 instructions use Pin 5 for the signal return lines. Using K9YC's >> method, would I connect the return lines to the DB9 chassis, and then bond >> Pin 5 (or Pin 1, or both) to the chassis also? > Do not use pin 5 for the return, use the shell of the DB9. > ______________________________________________________________ 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
