The new standard version of the KSB2 filter is the same as my 2.2 kHz design. Elecraft measures the bandwidth to the 6 dB points, so they quote the bandwidth as 2.3 kHz. If you want to use my 2.5 kHz bandwidth design, you now only have to change 4 capacitor values. -John KI6WX
----- Original Message ----- From: "Don Wilhelm" <[EMAIL PROTECTED]> > Folks, > > I didn't know that the 2.2 (or 2.3) kHz SSB filter had become the > 'standard', but it does get my vote. I have long advocated the KI6WX 2.2 > kHz filter bandwidth as my choice for a great compromise between 'punch' for > QRP operation and good SSB fidelity. It does offer a flatter passband than > the original 2.0 kHz SSB filter. To my mind, the 2.5 kHz bandwidth is a bit > too wide, but many folks favor it for the increase in fidelity. > > I do recall there was a time when the Collins 1.8 kHz mechanical filter was > considered the ultimate for communications effectiveness - at least in the > receive part of things - my how times and values have changed!!! > > 73, > Don W3FPR > > ----- Original Message ----- > > > I recently built a KSB2 with the now standard 2.3Khz filter configuration. > I > > have been recieving compliments on the TX audio quality. Some have said > the > > SSB audio is the best they have heard from a K2. The filter sweeps on > > Sectrogram show less ripple and more symmetry then my previous 2.5kHz > KSB2. > > John K5XTX > > _______________________________________________ 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
