All the proposed changes to the 40 m bandpass were, as far as I can recall, intended to decrease the bandwidth from 300 kHz to 200 or 100 kHz. These modifications can be found here:
Elecraft's http://www.elecraft.com/Apps/eu_40_meter_narrow_bandpass_filt.htm EU 40 Meter Narrow Bandpass Filter and http://www.dl7maj.de/Modifications%20for%20BPF.pdf DL7MAJ's proposal which is almost the same as Elecraft's for 40 m. However, with the increase in 40 m allocation in Europe (region 1) some years ago and the decrease in the number of strong broadcast stations, these changes should not be necessary any more. I changed my 40 m bandpass back to the original one several years ago for this reason. David Pratt-4 wrote: > > I recall the 40m bandpass filter being changed several years ago. > ----- Sverre, LA3ZA K2 #2198, K3 #3391 http://www.qslnet.de/member/la3za/K2/mod.html LA3ZA Unofficial Guide to K2 modifications -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-40m-bandpass-filter-tp5924328p5924452.html Sent from the Elecraft mailing list archive at Nabble.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
