-----Original Message----- Hi Steve, A wierd quirk on my part, is I fuss over my K2's Filter settings. It took me about an hour, and a little home-brewed rock-solid signal source, but I am able to get all 4 filters so that I can not hear any shift at all in tone from one filter to the next.
I know I'm a strange bird But hey, thats what turns me on :~] Duane N1BBR ----------------------------------------------------- Don't be surprised if you do anything that requires you to re-read those frequencies into memory again and you once again notice a small shift, even though the BFO frequencies are identical to what you had before. That doesn't mean there's anything wrong with your K2. That's because of the resolution of the A/D converters that "read" the BFO frequency and convert it into digital data for storage in the K2's memory. They don't have a 1 Hz resolution. In fact, IIRC, their resolution is 20 Hz. So getting a "perfect" match between several filters is a matter luck, having the A/D converter digital output accidentally hit exactly the right values. You don't need an especially solid frequency source, just one that doesn't drift in the time you step through the filters checking the frequencies. Indeed, the easiest way to put the filters exactly where you want them is to use a wide band noise source so you can see the entire filter bandpass with a program like "Spectrogram" that provides a spectrum display of the audio output. Ron AC7AC ______________________________________________________________ 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
