> >> Does a 2.7Khz filter come as a standard filter with the KRX3 > >> receiver? > > > > Yes. See the K3 order web page. > > My understanding is that with that filter and the DSP, if one > is not heavily into contests and isn't in an area with 30 + > over 9 sigs, the other filters may not be a requirement, even > though a nicety. > > I'd love some feedback form any of the beta testers who may > have operated with the minimal kind of filtering.
My advice is "yes", the 2.7 kHz roofing filter is all anyone needs. The narrower roofing filters add nothing the vast majority of time. Only in extreme situations where very strong adjacent signals are present, outside the passband but inside the wider roofing filter, will a narrower roofer help the DSP do its final filtering job. I keep reminding people that other radios, e.g., the Icom 756 Pro series, have a 15 kHz roofing filter and rely on DSP for the final IF filtering, as does the K3. Only a very few, more expensive, radios (Orion, Orion II, Icom 7800, etc.) offer switchable, narrower roofers. And, very few operating situations require the narrower filters. Moreover, adding filters to the K3 in the future is trivial. They simply plug in and a screw is inserted for comprehensive grounding. Get some experience with the radio in your operation scenarios before committing to additional filters. 73, Ed - W0YK _______________________________________________ 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
