KT5D asked: Everything seems to be fine except that as I scroll through the CW XFIL filters, the tone of the test signal changes slightly. Is this to be expected? Is it possible to get the tone exactly the same for every filter setting or is a slight variation normal?
---------------- Yes, it is normal to have a slight variation although sometimes you "get lucky" and it will be zero. What's happening is that when you select a filter (FL1thru 4) digital data is being recalled from memory that is converted into an analog voltage that tunes the BFO and VFO to the right frequencies. The accuracy with which the analog voltage is generated is limited by the Digital-to-Analog Converters (DACs). The DACs in the K2 provide a resolution of about 30 Hz. That is, the frequency can be as much as 30 Hz different from the value that was originally set when the filters were aligned. What you need to do to get it closer, if you can, is to repeat the filter alignment procedure in the manual. Actually, you don't need to repeat the whole setup, but simply cause the system to re-store new digital data for the current settings. Information on now to do this is included in the Builders Resources on the Elecraft web site. You may get a closer "match" or, if you are already within 30 Hz, it might not be quite as good! Ron AC7AC _______________________________________________ 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
