Comments interspersed -------------------------------------------------- From: "George A. Thornton" <gthorn...@thorntonmostullaw.com> Sent: Friday, March 05, 2010 2:20 PM To: <Elecraft@mailman.qth.net> Subject: Re: [Elecraft] K3 - Purchase Recommendations??
> I am relatively new to the K3 and I am not a contester. I did > want to > give my reactions to the 1.8 filter as a second SSB filter. I > have one > and I have been listening through it. > > > > The way the filters work, the K3 does not kick in the filter > until you > narrow the bandwidth to that filter's size. > So, if you get the 1.8 all > bandwidths between 1.9 and 2.7 or 8 will run off of the > standard 2.7 or > 2.8 filter, and the 1.8 sits idle. Even though you install a 1.8 filter, you can "tell" the K3 in the config menu whatever you want. I declared my 1.8 to be a 2.1, so it cuts in at DSP BW = 2.1. > > > > What I have observed is the narrower the filter the weirder and > more > unnatural it sounds in SSB. At 1.8 you have filtered out a > substantial > part of the normal SSB signal. What left can be understood but > it is > not pleasant or comfortable to the ear. You may find the > filter very > helpful for picking out a weak signal under difficult > conditions, but > you would not want to use that for very long, and not for > casual talk. > The secret to using the 1.8 is to first normalize the passband, and then use only HI CUT to reduce the DSP bandwidth from there, as required. My usual ssb contest dsp setting is FC=1.25, BW=2.1, using the 1.8 filter. The 1.8 sounds great at that setting. HI CUT can be reduced even further if required. Dave Hachadorian, K6LL Yuma, AZ . ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
