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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
