Today when using my KPA500 I switched it into operate mode from standby and received an error message of 270V ERR. This is the first time I have seen this error. I partially disassembled the amplifier and measured the 270V voltage and it is 70V, which is close to what the HV voltage measured on the front panel says. After finding some old outdated schematics on the internet it looks like there is a diode capacitor voltage multiplier circuit that takes the HV voltage of approx 70V and brings it up to 270V. I am assuming I have lost one of the diodes in the chain. Unfortunately Elecraft has used tiny diode packs and even put 2 of the 3 packs between electrolytic capacitors on the board, which I will have to remove. Has anyone else seen this problem with their KPA500? And how did you go about fixing this?
Thanks, Bruce, WB6IZG ______________________________________________________________ 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
