Hi Keith, The first thing I tried was the finger dimple - didn't like it because I usually tune by rotating my finger around the outside of the knob.
I ordered another stock knob -- it has a rasp-like front edge that didn't make for comfortable tuning. I ground off the raspy edge using the "scary sharp" technique (*). You don't have to remove much -- it looks no different that the stock knob unless you use a magnifier. If you can see a difference you've probably taken off too much material. I took out the brass insert and polished the back of it beginning with the scary sharp technique and very fine, maybe 1500 or 2000 grit automotive paper. It had a number of high spots. I finished up with two grades of jeweler's rouge, first on glass and then with a buffer. When you're done, the rear surface should be perfectly flat and mirror smooth. I put one drop -- that's ONE DROP -- of Jojoba oil on the felt washer. A single, gentle spin will advance the tuning 1.5 to 2.0 kHz at the 10-Hz rate, yet the knob never wanders around by itself (as it will do if you don't have it bearing on the washer). Cheap, easy, no machine shop required - takes about an hour and makes a nice-handling knob, at least to me. (*) Scary sharp ref: http://home.earthlink.net/~kvaughn65/scary.html 73, Ken K3VV _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
