Hi, all concerned: I wrote the mother ship about the following several weeks ago, in ignorance of efforts on the firmware APF. I didn't hear anything back, which is just as well, cuz I like the firmware version as much, or better, than anything I've cobbled up <g>.
In any case, if you download the K3 LPF add-on filter manual and study the schematic, you can experiment with your own low-level active or passive APFs using the cuts as in and out, if you choose. Just bring the connections out of the radio in shielded cable. I use designs from an ancient TI app note: "Application Report SLOA058– November 2000" whic I found on line while googling "state variable filter". I like SV filters cuz you get hi/lo/allpass-notch-peak functions from the same circuitry. Remember, ymmv. I am interested in the operational contrast between the analog and digital worlds, and this is a relatively easy comparison. I opte for the factory lpf mostly to avoid YA box on the table. Brgds, Dave, N3HE -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-LPF-add-on-filter-tp5740196p5741984.html Sent from the [K3] mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
