In my opinion, antenna switching should either fully automatic or fully manual. I've had both, plus a mix. I've never had a problem when it fully one way or the other. But for various reasons as stated in Joe's, it created problems, popped diodes, what have you. The K3/KAT500/KPA500 can work either way. DON'T mix the methods!! You'll surely be saying "OOPS"(Or worst) sometime in the future. That "OOPS" can be expensive!!! Larry/K2GN - http://k2gn.com
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Joe Subich, W4TV Sent: Wednesday, October 10, 2012 5:14 PM To: [email protected] Subject: Re: [Elecraft] KAT500 Antenna Selection? > Not if the operator isn't stupid. ... or tired, not thinking clearly, in a hurry to work a "new one", changing the SO2R radio while concentrating on the run rig, or in a hurry to work a multiplier on a new band, etc. It only takes one time to forget to "tune" the KAT500 - or have something happen to a normally well behaved antenna - for the KAT500 delay RTTY to a legal limit amp by 1/4 second so the vacuum relay switches at full power and end up with heap of trouble. I'm not saying the RF switching/tuning isn't fine in its place but I would certainly want to minimize the chances of a failure by using the band data. If it were my design, the pass through PTT would not activate until the input PTT had cycled - that is if the KAT500 had to take the amplifier off line to retune, the PTT would not activate until the input PTT had cleared and been asserted again. 73, ... Joe, W4TV On 10/10/2012 4:56 PM, Jim Brown wrote: > On 10/10/2012 12:15 PM, Joe Subich, W4TV wrote: >> This only moves the hot switching from the KAT500 to the amplifier. > > Not if the operator isn't stupid. A smart operator will do as I have > described -- a short burst of RF to let the KAT determine operating > frequency and recall settings. And with an amp like the Titan, simply > put it in standby to let the KAT tune if needed. > > 73, Jim K9YC > ______________________________________________________________ > 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 > ______________________________________________________________ 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 ______________________________________________________________ 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
