At ZM1A (multi-two) during the ARRL DX CW contest we received some reports of "choppy" CW when CT was keying via the 'Key' socket. Monitoring the signal with a K2 (dummy load in antenna socket) confirmed the reports. CW sent using the paddle was normal. Both 'station one' K3 and 'station two' K3 had the same problem - substituting a spare K3 made no difference. BTW, it's not RF getting into the computer - the keying is just as bad at 5 watts out.
We continued operating, using the K3 memories for CQing and the exchange - luckily it wasn't a serial number.<G> I don't know when this "choppy" keying problem started because the K3s are only keyed by CT during contests, but today we tried a spare 746Pro which eliminated the problem. So the problem is specific to our K3s, all of which had MCU 2.67 installed plus the 'CW rise time' and RS-232 RF immunity mods in early February... Anyone else had this problem? 73, Ken ZL1AIH (ZM1A in contests) ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
