David, The 40 meter LPF was changed to an elliptical filter - you can see by comparing the old and new circuits. I am not certain of the reason, but I have assumed that it provides better performance for both 50 and 40 meters (better harmonic rejection for 60 meters).
73, Don W3FPR On 1/15/2011 3:21 AM, David Pratt wrote: > Don W3FPR: > A query about C228 a few days ago prompted me to look at my own K2 > manual which does not show C228. Unless my old grey cells deceive me, I > recall the 40m bandpass filter being changed several years ago. In fact, > I have found an old envelope in which I have gathered together the > necessary five capacitors to make the change. > > My question is: What was the reason for the change of the 40m bandpass > filter and is it worth doing? BTW, I do use my K2 on 60m. > > 73 de David G4DMP ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
