The powered-off K3 loaded down the KEY IN line, placing the KPA500 in transmit mode. It was drawing bias current, dissipating heat. After a while, the heat sink temperature rose to the FAN1 threshold and the fan came on.
As you said, the solution is to turn off the KPA500 (or place it in STBY mode). 73 de Bob, K6XX On 5/31/2012 3:20 PM, Bill Hammond wrote: > I had the entire K-Line on and needed to reload the P3 software. I shut down > the K3 and reloaded the P3 software. It takes a while. During the reload > the fans came on on the KPA500 and then cycled off several times. Apparently > there was some interaction between the K3 powered off and the KPA500. Not a > problem as the fix is to turn off the KPA500 too. I just thought it was odd. > :) > > > Bill Hammond > wham...@aol.com > Bill Hammond-AK5X > a...@mac.com > a...@sbcglobal.net > K3 #69 > P3 #817 > KPA500 # 149 > K2/100 #4637 > K1 #2033 > KX1 #1023 > KX3-K someday December 28 order. > T1 > > ______________________________________________________________ > 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
