On 17/05/2009 17:18, "Phil Duff & Ann Duff" <[email protected]> wrote:
> > [email protected] wrote: >> For the life of me I cannot imagine what is being done to the radio to cause >> destruction of the original knobs. > No abuse needed and not likely. > > I recently assembled K3/100 #2871 and also had to replace some of the AF > and RF gain knobs. > > The knobs in the bad batch will crack/split with just a slight > tightening of their set screws. Thats what I encountered. I've > installed many equipment knobs over the years and was careful to not > over tighten the sets screws per Elecraft's instructions. > Never-the-less the old ones cracked. Elecraft replaced them and so far > all is well. > > 73 Phil NA4M You are absolutely right Phil. I'm not 'ham-fisted' by any means, but both of the knobs on my K3 (#980) spilt a few months back. Elecraft sent me a couple of replacements and I was _even_ more cautious in tightening them up. One of them started to split within a couple of weeks and I immediately opened up the splits and filled with epoxy and so far all is still okay, and you can't see where I glued it. The other one, tightened to the same degree of torque is still in one piece. I note that there is no metal ferrule in these knobs. Just about every other knob I have ever fitted has had a (usually) brass ferrule which happily copes with the stress of a fastening. I had rather hoped that the replacement ones supplied to me would have had a metal ferrule too, but they did not. 73 Stephen G4SJP ______________________________________________________________ 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
