One of the strengths of the K2 is its single-conversion design. That is, in part, responsible for the extremely good specifications the receiver enjoys. However, i.f. shift such as other rigs often feature require a multiple-conversion design with all the issues that come with additional mixers, oscillators and complexity.
Even so, you can enjoy i.f. shift with the K2. It's not as flexible as the multiple-conversion receivers use, but it does a FB job for me. Simply set up for different i.f. bandpass positions on your four XFIL filter positions. Remember that FL1 is always used for transmit, so that one must be set for the best transmit audio quality; its position will be set, in part, by your voice and the microphone you use. Even so, you'll probably find it's the best general-purpose position for receive too. Now you can set the other filters to put the passband closer to or farther from the carrier frequency as you desire. I have one position set closer to the carrier frequency for SWL-ing, since that provides better bass response on broadcast signals. You don't even have to use the OPT1 filter for the other positions, if you want a "tighter" bandwidth. You can use adjustable-bandwidth filters and crank one down tight for minimum bandpass and set it according to your tastes. Now, when you encounter a weak or QRM-ridden signal, you can select between the four different filter and filter settings by pressing the XFIL button. Ron AC7AC -----Original Message----- Hey friends, how hard would it be to implement something along the lines of an IF shift, ala the TS830S IF shift? That's something I really like about my 830 and it seems like it would be a nice addition to the K2. Along the same lines, would it be feasible to have an outboard S-meter needle? I guess I'm somewhat old fashioned :) I do have the DSP module in my K2, and I guess I could achieve similar results with that, yes? It's just that it's not a simple knob to turn... Thanks for any thoughts, Jeff _______________________________________________ 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
