Six weeks or so ago, I put up a couple of posts asking if anyone had had an issue with opposite sideband null on their KX3. I was having a problem getting a good null when FL3 was selected, although I had very deep nulls with FL2 or FL1. I wasn’t motivated to check because of a perceived problem. I had simply decided to rerun the null procedure on a “just because” basis, for the same reason any radio I own ends up on the bench periodically for a checkup and alignment. I didn’t get any response from the list, so I presume this isn’t something most have rechecked.
In any case, Elecraft support suggested my results indicated a defective KXFL3. After receiving and very carefully installing a new one, sure ’nuf. All is fine now. My subjective impression is that tuning around with narrow CW sounds “cleaner” since I have a good null on all bands and all filter settings. I don’t really know if the original KXFL3 was DOA (although it was no doubt checked by Elecraft prior to shipment), if it suffered a random or infant failure, or if I was careless with the KXFL3 board while doing the initial kit build a few years ago. Could certainly and perhaps most likely have been the latter. Calibration is probably worth doing once in a while anyway. Components age and drift, and, no matter what, things just happen. And I did get excellent support from Elecraft while working through the problem. Grant NQ5T ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
