Thanks for the reply, Alan. That's interesting. I didn't realize that the two receivers in the K3 had a random phase difference between them even when locked. I noticed differences in phase delay when I changed frequencies during my tests with the two horizontal antennas on the tower, but I mostly attributed that to different arrival angles for the different stations being monitored, and different phase delay of the feed lines (expressed in wavelengths) at the new frequencies.
However, that random phase difference between the two receivers could be adjusted out by momentarily feeding the same antenna into both receivers at each new frequency. That routing could be accomplished within the K3 if there was a quick and easy way to control whether or not the sub receiver was switched to the AUX RF antenna when diversity mode is active. If that routing option took the form of a command, the whole process could be done in software (either external or internal to the K3) each time the frequency was changed ... albeit of course with some settling delay while the phase difference was determined and adjusted out. 73, Dave AB7E On 9/16/2010 8:42 AM, Alan Bloom wrote: > Yes, I think that would work fine. There are two issues that I can > think of: While the main and sub receivers are phase-coherent, the > actual phase difference between them is random. I believe that if you > change frequency it is not guaranteed that the phase difference will > be the same. So every time you change frequency you may have to > re-adjust the phase delay to get the antenna to "point" in the right > direction. ______________________________________________________________ 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
