Thanks to Jack Brindle's quick response from Elecraft, the mystery has been solved. The cable from the KAT500 to the KPA500 is missing 4 pins.
73, Eric WD6DBM ______________________________________________________________ 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

