Dave, The variable filter is not completely unsuitable for SSB listening, it just has a high passband ripple which can become tiring after a time to some people's ears. I use the variable filter as a narrow SSB receive filter to combat high pitched QRM (1.8, 1.7 or 1.6 kHz widths), but it does OK out to about 2.2 or 2.3 kHz. The passband is relatively flat up to about 1.2 kHz and above that the ripple becomes progressively greater as the width is increased.
73, Don W3FPR > -----Original Message----- > > Is the K2 unsuitable for listening to SSB if the KSB2 isn't installed? > > 73, > Dave > N7AF > > > The SSB filter is much more pleasant to use than the CW filter set for > > a wide bandwidth. The SSB filter has a flat passband, whereas the CW > > filter, being varactor controlled, develops a lot of ripple by the time > > you widen it out. We experimented with variations on the filter > > topology before releasing the K2 to production, but it was getting too > > complex. > > _______________________________________________ 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
