I wonder if he is talking about QRN from storms, etc. or manmade QRN? I've heard this before. The K3's AGC pulse rejection feature is intended to improve performance in this area.
Has anyone tried to quantify or describe this better? It would need to be done with an a/b comparison. It's not so easy to describe types of QRN, either. 'QRN' is meaningless, because of the huge differences in the nature of noise, which anyone who tries to compare noise blankers, for example, soon learns! On 7/13/2010 9:37 PM, [email protected] wrote: > > > Dick Van Zandt (K9OM) has sent you a forum message for you to review. > > > ----- start of message ----- "Noisy DSP experiences". > > Forum: Articles Subject: An Interesting CQ WPX CW Experience > > The"noisy DSP" phenomena is well known. Rob Sherwood has also > identified this > problem and has written about it. > > I have the following radios K3 K2 Flex5000 IC7700 Perseus > > ALL the above radios except the K2suffer from the noisy front end problem > when mild > QRN is around. It sounds like these radios have a reverb unit on the > receiver which > multiplies static and pulse noise. > > Elecraft claims to have a cure for this problem, however I still find the > receiver > noisy. The K2 I prefer over the K3 on CW when there is QRN around. The > filters on the > K2 sound better on CW when there is QRN about. > > It amazes me every time that I turn on any of my old old analog radios like > the TS830S > or the FT1000D and do a comparison. The QRN all of a sudden becomes tolerable > and not > so nerve wrecking. > > The TS830S is still my favorite low band radio for picking weak signals out > of QRN on > 160 and 80 meters. This is especially so when there is a lot static and QRN > around. > > Its unfortunate that there is no current model analog transceiver > manufactured that > has fantastic receiver dynamic range numbers like the Elecraft K3. The only > option > available is to build your own like the PA3AKE H-mode mixer high performance > receiver. > > http://www.xs4all.nl/~martein/pa3ake/hmode/ -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ ______________________________________________________________ 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
