Hi Don, Thanks for the response. I received an off-list reply from another fellow who mentioned U6 on the KPA100 being an issue--but he said that I should be using the 3 conductor cable to connect the KPA100 to the USB-to-serial adapter. To clarify, I *am* using the adapter in the KPA100 manual (DB9 female on one end DB9 male on the other end) to connect to the USB-to-serial cable.
In any case, I do agree that there is an issue related to the key or something being shorted to ground--but I don't think that keying the rig for the less than 2 minutes it took for me to run upstairs to get my headphones would've caused something to burn up (which is definitely what happened). I'm concerned about the fact that I saw a small spark when I plugged in the USB to my laptop and what ramifications that may have for the KPA100 unit or its circuitry related to the rig control/DB9. The key was definitely all the way in, though, I'll check that this afternoon during my son's nap. Thanks! -john On Sat, Jan 22, 2011 at 8:28 AM, Don Wilhelm <[email protected]> wrote: > John, > > Maybe you are working on it too late :-) . > > If the keying stops when the key is removed, I would suspect the key and > cable rather than the K2. > To see if there is a key jack problem, plug a bare 3.5mm stereo plug into > the jack. > > If your plug is only partly inserted, the dash contact in the key jack can > be touching the shell - that will key the K2 with dashes momentarily until > the plug is seated. > > As a side-note -- I have found several K2 owners who severely tighten the > dress nut on the key jack (and the BNC jack as well). That really is not > necessary and can damage the jack. Just tighten a little bit beyond finger > tight. The nut holds neither the rear panel nor the jack in place, it is > just there for appearance - just tight enough to keep the nut from backing > itself off is sufficient. > > 73, > Don W3FPR > > > On 1/21/2011 10:25 PM, John Shadle wrote: >> >> First follow-up. >> >> When I unplugged the key from the back of the rig, the keying stops. >> If I change the input to "hand" then it keys continuously (once I plug >> the key back in). Again, if I remove the key, the keying stops. >> >> Hope this helps. >> >> Still not sure what in the world I fried. Haven't opened up the case >> to check yet. Need to get to bed now. Zzzz. >> > ______________________________________________________________ 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
