G'day Eric When I assembled my K3, #5234 (with improved knobs) the problem with the concentric knobs was not breakage but taper in the bores of the knobs, 7 thou larger on the outer end to the other if I remember correctly, this had the effect of throwing the outer (operator) end of the knob over in a direction away from the grub-screw when tightened, the only way I could make them work freely was to not nest the smaller knob inside the moulded relief part of the larger knob, not a big drama but being eccentric it is noticeable looking at the front panel, I considered asking for replacements but thought the replacements probably would be the same so then I was going to machine up some brass inserts myself to fix the problem, yeah right! getting down time when I am not using the radio is the problem !
73 Wade VK4WM On 9/08/2012 2:05 AM, Eric Swartz - WA6HHQ, Elecraft wrote: > Please note that all K3 knobs are warrantied for the life of the > radio. We will replace them immediately if they break. > > While most K3s never have seen knob breakage, we have seen it on -way- > too many radios. We were not happy with this. We went through several > evolutions on the concentric knobs as the vendor got their quality > under control. (This is a US vendor, EHC, with a great reputation. We > were very frustrated with their issues.) We first added glass fiber > fill to strengthen them, which helped a lot, around the time of your > rig. They are now made with metal inserts. (We phased those in this > year.) > > We have seen virtually no breakage on the latest versions of the > concentric AF/RF knobs, which are shipping on all new K3s. > > Anyone who has broken knobs can contact [email protected] for free > replacements. If you just want an extra set and do not have breakage, > they are very reasonably priced. > > 73, > > Eric WA6HHQ > --- > www.elecraft.com ______________________________________________________________ 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
