I too was skeptical about finding ANY improvement to s/n ratio under contest conditions.
A couple of years ago, I was confronted with some S-7 broadband digital-like RFI while using my K3 in an extremely urban environment. But, using BOTH NB and NR and fiddling with settings eventually allowed me to operate and to make a whole bunch of contest QSO’s in CQWW CW. It is possible - but still unpleasant. 73, Alan K0AV On Wed, Dec 15, 2021 at 8:15 AM David Hachadorian <k6ll.d...@gmail.com> wrote: > For 12 years I've tried to get any enhancement of s/n from the K3 IF/RF > NB and NR. I haven't seen one case where there is any improvement under > contest conditions. When the s/n just starts to improve, the desired > signal is modulated and degraded by nearby signals to the point where > reception is better with NB/NR turned off. As far as I can see, both of > these features are useless on the K3 under contest conditions. > > Dave Hachadorian, K6LL > Yuma, AZ > > > On 12/15/2021 7:36 AM, Pete Smith N4ZR wrote: > > Last weekend during the 10 meter contest I was experiencing very loud > > line-noise-like interference when my antenna was pointing south. I > > tried both my K3's Noise Reduction and Noise Blanker functions, and > > was unable to find any setting that gave useful relief. With the > > noise blanker, in particular, I noticed that when it was on, not only > > was the buzz still very strong, but it seemed as if all CW signals on > > the band were being hum-modulated. As soon as I turned off the noise > > blanker, the CW signals cleaned up. Is there something wrong with my > > radio, or an adjustment issue, or is this interference simply too > > strong? Obviously, I'll be trying to track it down, but it's not > > there all the time, so that could be tough. > > > ______________________________________________________________ > 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 alan.hig...@gmail.com ______________________________________________________________ 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
