Don Thanks - that was the hint i needed to sort out the maze of connectors.
Yes it was open from KAT100 U1 pin 40 to K2 Control Board P4 pin 2. So i opened the K2 and laid everything flat -- each board was ok. I powered up and it came to life. I suspect the ribbon cable between the K2 control board and KPA100 was pinched. I carefully put it together and all is well now. Thanks again for your help, and verifying voltage on your own K2. 73, Curt K2 #2117 --- Don Wilhelm <[EMAIL PROTECTED]> wrote: > Curt, > > All options use the Auxbus - your KSB2, the KPA100 > and even the KIOC > chip inside the K2 use th eAUXBUS. If the K2 is > working normally when > the KAT100 is attached, then the AUXBUS signal is > working. > > What is the problem with the KAT100? If it is not > recognized in the K2 > menu, then the KAT100 firmware chip is not > communicating with the K2 > (yes, it uses the AUXBUS for that). Be certain all > pins of the KAT100 > firmware chip socket are soldered (did you miss > soldering pin 1? - that > often happens). Connect the cable to the KAT100 > (turn power off) and > check continuity from KAT100 U1 pin 40 to K2 Control > Board P4 pin 2 - > somewhere near 470 ohms is expected. > > If all the above is correct, the KAT100 firmware > should be communicating > with the K2. > > 73, > Don W3FPR > > > Curt Milton wrote: > > I am still troubleshooting my KAT100, and now I am > > wondering if the problem might be the aux bus. > > > > When the 9-pin connector is attached to the K2, > and > > the KAT100 is disconnected - should there be 5-6 > volts > > DC on pin 6 ? I see voltages on pin 8 and 9, but > > nothing on pin 6. (And yes i verified the cable > is ok > > on pin 6). > > > > I had previously checked the DC path from pin 6 > back > > to the IOC in the K2 - but I hadn't probed this > any > > further. > > > > I suspect there are no other users of the Aux Bus > > except an ATU (my K2 has only ssb, 160m and kpa100 > > installed). > > > > Info appreciated. > > > > > > > ____________________________________________________________________________________ > > Looking for last minute shopping deals? > > Find them fast with Yahoo! Search. > http://tools.search.yahoo.com/newsearch/category.php?category=shopping > > _______________________________________________ > > Elecraft mailing list > > Post to: [email protected] > > 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 > > > > > > > ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ _______________________________________________ Elecraft mailing list Post to: [email protected] 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
