I also have the 1.0 filter in my K3 (#740) and use it almost always when in CW (in other words, all the time!). I had a 1.0 filter in the main IF on my OmniVI and it was great on CW. I only wished that INRAD had made a matching 1.0 filter for the bandpass IF! I got the matching set for the subrx, too (2.7, 1.0, .4, .25).
Allan K7GT On Mon, Jan 12, 2009 at 7:37 AM, Darwin, Keith <keith.dar...@goodrich.com> wrote: > I recently added this filter to my K3 to go with the 2.7 KHz and 500 Hz > filters it already has. These are roofing filters so there is a question of > whether or not they're needed - or even if they make a difference you can > hear. > > I've spent time tuning the bands (mostly 40) with my filter width set to 1.1 > KHz and 1.0 KHz, listening to the difference as the crystal filter is > engaged. Is it needed? I'd usually no. Does it make a difference? Most > definitely! > > I greatly prefer to operate with the 1.0 KHz filter engaged. I can keep my > DSP bandwidth wider while still rejecting noise from 2 KHz away. The > overall level of grunge in the receiver goes down when the crystal filter > kicks in. I used to run with the DSP set to about 700 Hz to get the overall > sound I wanted. With the crystal filter, I can open the DSP to 1000 Hz and > get the same or more rejection of signals several KHz away. > > - Keith N1AS - > - K3 711 _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
