The other day I turned on my Astron RS-35M and then my K3, P3, KAT500, and KPA500. I've done this at least once per day for the last several years. This time, however, I heard arcing from the Astron's on/off switch. Then I saw that the KAT500 LED was blinking constantly about 3 times per second. After doing some troubleshooting, I replaced the power supply switch with one I had here but the tuner's LED kept blinking and the unit would not respond to any key press, including the power button. I tried connecting the KAT500 to the computer but there was no connection to be made. Then the blinking changed frequency and got faster. Eventually, I was able to connect and reload the KAT500 firmware and everything has been OK since. I do have the KAT500 connected directly to the power supply since I am powering a P3 and a PR6-10 from the K3's aux power connection. I noticed that, normally, all the LEDs in the KAT500 would blink momentarily as the power supply was turned on even though I have the KAT500 set to power-on in the "off" position. Then it would power up and work fine. Anyway, sorry for the verbage, but my theory is that the bad on/off switch in the Astron corrupted the firmware in the KAT500. I don't know what the blinking "man" LED meant, and I don't know why there were 2 different blinking speeds. I built a little switch box to keep the KAT500 power disconnected while the power supply comes on and settles down so as not to have another problem in the future. (Marlin P Jones sells an in-line power on/off switch with a 2.1 mm barrel plug on one end and a 2.1 mm barrel socket on the other end. I would have used that except I cannot normally reach the back of the KAT500 in my configuration). 73, John W2XS
-- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ 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
