Makes the radio sound a lot quieter and less fatiguing to me. Honestly I feel much more comfortable for long periods of time behind the K3 after installing the filter. I should state that I changed the filter and several of the output caps at the same time.
I even tried to do some filters in the computer to simulate what I should expect and I didn't really hear the difference so much in those files but once the filter was in the radio I noticed a difference. I have pictures of the differences that you can see here: http://dl.dropbox.com/u/1493706/K3/Audio%20Filter%20Board/Wide%20Band% 20noise%20injected%202.8Khz%20BW.png http://dl.dropbox.com/u/1493706/K3/Audio%20Filter%20Board/1uV%20850Hz% 20BW.png http://dl.dropbox.com/u/1493706/K3/Audio%20Filter%20Board/50uV%20Signal% 20850Hz%20BW.png In all 3 pictures the green trace is before the LPF board was installed and the red trace is after. I should also note that the sample rate was different between the two captures and that is the reason behind the difference at the very high end... Anyway those are my thoughts... Some subjective and some not so subjective... Hopefully that helps. ~Brett On Mon, 2010-03-01 at 11:40 -0500, Edward Dickinson, III wrote: > I'm a SSB operator and am interested in the Low Pass Filter Update/Mod. > > Can someone with a pre-Rev D DSP board who has installed the K3DSPLPF speak > to the improvements? > > Thanks. > > > 73, > Dick - KA5KKT > > ______________________________________________________________ > 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 ______________________________________________________________ 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
