Having managed to break a few myself (have to remind myself I'm not rebuilding an auto engine), I think what is going on is that the knobs are (or were) still curing, causing them to shrink a tiny bit after being tightened on the shaft.
I think the curing accelerates after being put on the radio because they have free air around them, instead of being in a bin or box. I found the screws TIGHTER a week after I put the knobs on. I simply loosened and retightened them to "pinky torque" and no problems since. Pinky torque is to use your pinky ONLY as pressure on the allen wrench when tightening. One probably does not even need that much. 73, Guy. On Thu, Jun 23, 2011 at 1:46 AM, hb9ari <hb9...@bluewin.ch> wrote: > Hi Brian, > > Thank you for the reply. > As i bought an assembled K3, i don't > tighten the screws. > As Tim explained in his message, this "problem" > was present sometimes in a particular batch. > > I will send an email to the "parts" department. > > My best 73, > Rudi, HB9ARI > > > > On 23.06.2011 00:50, Brian Maynard wrote: >> I had the same problem at the time I built K3 #4974. Elecraft sent >> replacements right away (the usual excellent service), and coached me not to >> over tighten the set screws (two per knob). The knobs are pretty soft and >> deform easily if over tightened. >> >> ----- >> Brian, op K1NW >> -- >> View this message in context: >> http://elecraft.365791.n2.nabble.com/Concentric-knobs-tp6502754p6506455.html >> Sent from the Elecraft mailing list archive at 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 >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
