Does this app note apply here? Application Note: Alternative Wiring for the K2's AF GAIN Control Wayne Burdick, N6KR, with illustrations by Tom Hammond, N0SS Oct. 25, 2001 This optional modification greatly reduces the level of noise or other artifacts that might be heard on a small number of K2s when rotating the AF GAIN potentiometer. Pots judged as "noisy" are, in fact, probably good; the original circuit is simply sensitive to the pots' inherent non-linearities. In addition to eliminating most pot noise, the new circuit provides nearly dead silence when the control is fully CCW, while the old circuit allowed a small amount of leak-through.
You can find the whole note in K2/K1 applications. ---- Original message ---- >Date: Tue, 10 Nov 2009 02:35:10 +0000 >From: [email protected] >Subject: [Elecraft] K2 Clean or replace AF Gain control? >To: [email protected] > >I just noticed my K2 has a problem with the AF Gain control. It >is "scratchy" in the area where I use it most. I see that the RIT control >(rarely used) also has some linearity issues. The rig is about three years >old. I do not use it on a daily basis, but I do use it in contests , where >it gets stressed pretty well. > >I must either clean or replace the AF Gain control ASAP, and I see it will >be rather hard to get at. Can anyone tell me if these controls can be >accessed to clean them, or should I just order replacement parts? It would >help to know before I tear the rig apart. > >Thanks and 73, > >Tom, KG3V >______________________________________________________________ >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 ______________________________________________________________ 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
