Hi Don, Thanks for the tips. It turned out to be a bad 1/8 in plug. The insulation between tip and first ring is too small, so it doesn't fit correctly. I probably tugged just a wee bit on the cord while testing (apparently repeatedly... go figure). If I don't insert the plug in all the way it works fine. If I use the KXPD1, it works fine.
I'll just change the plug and hit the air with my KX1 and my straight key. Thanks and 73, Sean - VA5LF On 25/02/2010 3:12 PM, Don Wilhelm wrote: > Sean, > > You say the KXPD1 has been working fine, so try a test. Put the KXPD1 > back on, but leave the KX1 set for INP HND. > Use the dot side of the paddle only and 'key' it as you would with a > hand key. Does the KX1 do the same thing? > If it behaves OK, then look carefully at your hand key(s) and their > cabling. I would expect the resistance when the key is open to be very > high, but if you find it is down in the thousands of ohms, that may > cause the behavior you are seeing - clean the dust off the key (top and > bottom) and see if that helps > > If it mis-behaves with the KXPD1 during the test above, then the problem > is in the KX1 - look at the soldering for the key jack, C32 and C33, R16 > and R17, U1 pins 24 and 25 and RP1 pins 5 and 6 - reflow the soldering > for these components with a hot (750 deg F) iron and see if that helps. > Also be certain the U1 microprocessor chip is fully seated in its socket > - the leads should be in the socket almost up to the shoulders. It takes > some amount of pressure to seat it - place both thumbs on the chip with > the fingers beneath the board and apply pressure. Many 'strange > happenings' are cured by fully seating the microprocessor chip. > > If all that fails to resolve the problem, about the only thing left is > some strange behavior in the microprocessor itself, but this is the > first time I have heard a report like yours, so that is very far down on > the suspect list. > > 73, > Don W3FPR > > Sean Cavanaugh wrote: >> Hi all, >> >> I have a KX1 that has worked just fine for me for the last 2 years or >> so. I've been using the KXPD1 paddles without problem. >> >> I wanted to try working on some QRP contacts for the SKCC, so I >> plugged in my straight key and set the input to "hnd". When I start >> sending, the rig keys normally for about 20-30 seconds, then stays >> keyed for a random amount of time, whether the key is closed or not. >> It will usually stay keyed for between 10 and15 seconds, then unkey. >> If I close the key again it will do the same. >> >> I can get it to stop by unplugging the key or waiting, but it will >> continue to have this unkeying issue until I turn off the rig. It will >> then work for 20-30 seconds and start all over again. >> >> I've tried a different key with the same result. >> >> Any ideas? I'd love to not have to use the big rig for SKCC contacts. >> >> Thanks and 73, >> >> Sean - VA5LF >> ______________________________________________________________ >> 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 >> ------------------------------------------------------------------------ >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com Version: 9.0.733 / Virus Database: >> 271.1.1/2709 - Release Date: 02/25/10 02:34:00 >> ______________________________________________________________ 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
