After success on K2#4565, KAT2, KDSP2, KNB2, KAT2, KSB2, and KPA100, I’ve hit a problem with my KAT100. No relay action at all.
When I power up and connect the KAT100 and K2/KPA100, the K2 menu shows ATU and multiple ATU options submenu, the KAT100 LEDs correctly show switching between ANT1 and ANT2 and switching between HI and LOW power when the K2 power control is adjusted. But no relay action. Voltage checks show 12V on both sides of RFC2 and 5V to pin2 of U2, U3, and U4. Inspection shows no solder bridges around U1 or U2. Since the LEDs are working, seems like it’s probable the processor U1 is working OK and successfully getting its information from the K2. Likely problem would seem to be with the signal RYDATA from pin 17 of the processor to pin 3 of U2. I re-heated both these pins, with no change in results. (By the way, how is RYDATA supposed to get from U1,pin 17 to U2,pin 3? Seems like there is no board trace connecting the two.) Do I have a bad U2? It did take multiple attempts before getting its pins squared up prior to insertion in the RF board, but I had my anti-static strap on. Any suggestions? Thanks. 73, Bob, WO3E _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
