Hi, My K2 rig control via a KIO2 stopped. I discovered that RF sub miniature choke L4, 100 micro Henry, on the main KIO2 board was open circuit - no evidence of excessive heat etc. L4 is in the RS232 ground path. Shorting out L4 restored rig control. I replaced L4 with a larger version (all that I could find locally) but rig control didn't work. I tested the new L4 and it was open circuit, again no evidence of excessive heat. So the question is, what would cause excessive current through L4?
I feed the KIO2 via a USB to RS232 converter which plugs into a four port USB hub which plugs into a lap top. This combination has worked OK for several years. Mike VK1OO ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
