I think your on the right track with the kat500 being powerex up first. The other thing that can cause this is if you try to use the kpa500 on 27mhz. When field testing, I tried it and the kpa500 does a full fault and requires power down at the rear, then power up to rset. The FW does a nice job of preventing use on illegal sections of the spectrum such as this. MARS frequencies are fine though. Elecraft have done a great job on the kpa500, some of the tests I have done would have killed a lesser amplifier....grin
73 Gary On 19/01/2014 4:27 AM, "Cady, Fred" <fc...@ece.montana.edu> wrote: > I have seen that happen with the KPA thought at one time is was associated > with something happening on the AUXBUS - like the KAT not being powered up > or something. I think maybe there was a firmware upgrade for the KPA and/or > KAT that might have fixed it. Are you using the latest firmware? > > Glad the KX3 is working ok to drive the KPA. I just fired up the KXPA amp > here and am going to play with it and the KPA also. > > > Fred Cady > fcady at ieee dot org > > > -----Original Message----- > > From: elecraft-boun...@mailman.qth.net [mailto:elecraft- > > boun...@mailman.qth.net] On Behalf Of Jim Bennett > > Sent: Saturday, January 18, 2014 10:26 AM > > To: Elecraft Reflector Reflector > > Subject: [Elecraft] KPA500 Power On > > > > I recently got a KX3 and have set up my station such that the KX3 can > > share the KPA500, KAT500, and several antennas by using a pretty beefy > > Daiwa 2-position coax switch. The station is set up just like the > > diagram on page 147 of KE7X's KX3 book. This configuration seems to > > work very well. However, I've recently noticed a very occasional > > anomaly with the KPA500. Every once in a while, I go to power it on and > > nothing happens. I have to reach around to the back panel rocker > > switch, turn it "Off" and then back on. Then, the front panel power on > > button brings the amp to life. So far I've not been able to track it > > down to a particular sequence of operating events that precedes it. In > > the past 3-4 days, this has happened maybe three times. > > > > Anyone else have this happen, and if so (1) what causes it, and (2) how > > to resolve it? Not a big deal, but I'd like to know what's going on. > > > > Jim / W6JHB > > ______________________________________________________________ > > 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 > ______________________________________________________________ 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
