Did you re-run CAL PLL, ** AND ** XFIL on ** ALL ** Modes (USB, LSB, CW, CWR, RTTY, & RTTYR) ** AND ** when running CAL XFIL you MUST change the number (up or down at least on digit and then back to the same number) so that the MCU knows that it needs to re-store the frequency settings for the BFO.
Otherwise you have changed nothing but the frequency of the reference oscillator. For a long explanation see W3FPR's discussion. The short one is that the MCU stores a digit representing the voltage necessary to make the frequency. This is "number" determined by the Reference oscillator whose accuracy determines the repeatability and accuracy across all bands. In other words the 4.0 MHz oscillator is only used for the frequency measurement. It only measures the frequency when you run the CAL FILL and CAL XFIL. After that it does nothing. Rich, KE0X --------------- Last night I redid my C22 reference oscillator adjustment using WWV on 10mhz as the zero beat reference. This is the third time I have adjusted C22 and each time I am able to adjust C22 to a precise offset balancing TP1 and TP2. However, when I put the cover back on the K2/100 I find that WWV zero beats a few tens of hz off. (After last night's adjustment, the zero beat was 10000.03) One should expect to be +- 10 hz as that is the finest resolution of the VCO, but it would be nice to get a little closer. _______________________________________________ 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
