Perhaps there's a comment from Elecraft on the K2's Noise Blanker Dick, K2ZR/4
Brett Gazdzinski wrote: >Joe, >I will try this, thanks! > >Brett >N2DTS > >----- Original Message ----- >From: "Joe Planisky" <[email protected]> >To: "Brett Gazdzinski" <[email protected]> >Cc: <[email protected]> >Sent: Sunday, March 01, 2009 6:03 PM >Subject: Re: [Elecraft] K2 noise blanker > > > > >>Hi Brett, >> >>Last summer, I had similar questions about the KNB2 in my K2. In my >>case, a neighbor had put up a new electric fence and I was getting QRM >>in the form of a pulse every second. The unmodified KNB2 seemed to >>have little to no effect on the noise. In fact, I questioned whether >>it was working at all. A 'scrape test' (connecting a wire to the >>antenna connector and scraping it on some metal surface in the shack >>to generate static) indicated that it was indeed working. >> >>The modification described here >> >>http://www.dl7maj.de/KNB2-Mod.pdf >> >>seemed to improve the situation. After making the mod described, the >>KNB2 would partially take out the electric fence noise using the LEVEL >>LOW threshold. Not perfect, but better than it was. >> >>You can read the original thread by searching the list archives for >>the topic "[K2] KNB2 vs. electric fence" that started on August 3, 2008. >> >>73 >>-- >>Joe KB8AP >> >> >>On Mar 1, 2009, at 2:18 PM, Brett Gazdzinski wrote: >> >> >> >>>I have tried it on various types of noises, some which sounded like >>>auto >>>ignition noise, I think someone had something running without >>>resistor wires >>>or plugs, strong and weak signals, no change. >>>I did have a bad street light out front of my house, the reason I >>>got the >>>NB, but they fixed it before I got the noise blanker. >>> >>>The main reason I asked was there seems to be no degradation of >>>signals with >>>the NB on at any setting. >>>On most rigs, you can hear a difference, and where its adjustable, >>>it makes >>>things sound really bad when you turn it up. The pro 3 is like that. >>> >>>On the K2, I have been unable to detect it doing anything at all, >>>any mode, >>>any noise, although the noise level I usually have is not bad. >>> >>>Thanks for the replies, >>>Brett >>>N2DTS >>> >>> >>> >______________________________________________________________ >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 > > > > ______________________________________________________________ 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
