The switching speed should really be under 20mS to work reliably with an Amtor modem. Pactor (as used by Winlink) is less critical. Computer based transceivers can have slow change over due to long latency times.
My K3 and my Icom IC-7300 are fine on Amtor (and Pactor). I have a KX3 but haven’t tried it. The ARRL review T/R speeds of the IC-7300 are 15/14mS, the KX3 is 44/30mS. The K3 with sync data mode was 22mS in the April 2008 QST review. No idea about the K4 though. 73 Dave G4AON -- Sent from my iPhone SE ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com