Sliding off topic a little: in designing some outdoor industrial control equipment I was required to use some chunky, robust push buttons that were good for high voltage, high current but no good at 12V. Getting to logic level I had to build in a lot of extra current from 12V to ensure a good switch over, I think some 30mA or so.
Using a favourite pre-war Morse key on vintage valve gear, it worked perfectly, but on modern solid state equipment it was very intermittent and I didn't want to make an interface. Solution, clean the contacts. Conclusion: modern gear needs better contacts than the old stuff. David G3UNA/G6CP > On 15 October 2020 at 15:19 dl2ki <dl...@darc.de mailto:dl...@darc.de > wrote: > > > Hi, > > i posted the article here for discussion, because I can't judge it myself. > > I think that Elecraft had a little idea to design the keyer electronics of > the K3 as it is. > > Interesting is the difference to the K2, where the resistors R1 and R2 > were > changed in revision "B". Again I can't judge if this had anything to do > with > this topic. > > OK, I'll just leave it like this. Maybe somebody will have some experience > with it after all. > > Thanks a lot > Wolfgang, DL2KI > > > > > -- > Sent from: http://elecraft.365791.n2.nabble.com/ > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net 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 > Message delivered to d.cut...@ntlworld.com mailto:d.cut...@ntlworld.com > ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
