Hi I did this on one of the K1's I built a while back. To change from 150 kHz to 80 KHz you change a capacitor from 120 pf (I think) to 82 pf. If you want 100 KHz then use 100 pf. Use a NPO type cap or you may get too much frequency drift. I looked for 20 turn pots also but all of the pots I found are too big to fit on the front panel and cost $50 to $100. However there is a metal shaft version of the pot used in the K1 that has a better feel and is more rugged and only cost $13 from Mouser. I have installed this pot on the five K1's I have built for people.
Don Brown KD5NDB ----- Original Message ----- From: "David Toepfer" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, September 14, 2005 5:56 PM Subject: [Elecraft] K1 tuning range ideas/questions > I know the K1 comes with a standard tuning range choice of 2 (80k or > 150k). > But I was wondering if it were possible to do something like 100k. I ask > because there is almost a concensus that the 150k tuning range is too > fast, so > I would like to avoid this. But I would also like access to 3.575-3.585, > which > seems beyond the 80k tuning range choice. I suppose I could just choose > 150k > and buy a 20-turn pot and have the best of both worlds. And if this were > the > case, I wonder if I could make a 250k tuning range with a 30-turn pot. > > Help/Feedback? > > David, K3TUE _______________________________________________ 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
