The solution is to disconnect the AUX cable from the KPA when using the KX3. This is not a KPA issue - you can leave the KPA500 turned on and power off the K3 and you will see the KPA switch to 60 meters after a short while.When the K3 powers off, the Vcc naturally sags to 0V. The Band line outputs are pulled up to Vcc. When the K3 internal supply goes to zero, they still pull to Vcc, which is zero. That represents 60 meters. If the KPA is on at this time, it will follow orders and go to 60 meters…
The more dangerous situation is that the K3 _may_ pull the KEY line output to zero, which keys the KPA. The real solution is to switch the K3 out of the AUX circuit when using the KPA with some other transceiver. Jack Brindle, W6FB On Feb 25, 2014, at 9:44 AM, Jim Bennett <w6...@mac.com> wrote: > So, as Lyle (KK7P) and Brian (K3KO) are saying, this is due to (1) having the > KPA500 set to K3 (I do), and after the amp sits and capacitors discharge, > there is no voltage coming through the acc connector and the amp goes to 60 > meters. > > Well, if that's the case then I guess there isn't much that can be done about > it. Sighhhhh....... > > Tnx, Jim > ______________________________________________________________ > 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 ______________________________________________________________ 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
