Hi John, Do you check all possibilities of the NB and no-one of those are able to block this Radar ? We are facing time to time in my area such problem and had always founded a reliable position to minimize it, but may be the today's NB is less effective, I have no experience on it and I'm interested by all comments on the subject. Bst 73's Philippe A65BI K3#3616
>>> juergen <plebia...@yahoo.com> 20-05-2010 15:15 >>> Hi When the K3 was first released, the noise blanker was very effective on the Chinese Radar on 40 meters. This radar was very active on the CW end of 40 meters. You could totally eliminate this radar signal with the K3's noise blanker. As the firmware was updated, the K3's noise blanker seemed to become less effective or almost had no effect at all. Anyone else notice this loss in performance? I wonder if this ability to notch this low band radar was removed from the K3's noise blanker algorithm? It could be that the radars pulse repetition rate or pulse width has changed rendering the noise blanker useless against it. Anyway when the K3's blanker was working it was outstanding on 160, 80 and 40 meters against this constant QRM source. John --- On Thu, 5/20/10, N3XX <n...@charter.net> wrote: > From: N3XX <n...@charter.net> > Subject: [Elecraft] Connections to K3 ant 1 & 2 > To: "Elecraft Reflector" <Elecraft@mailman.qth.net> > Date: Thursday, May 20, 2010, 3:18 AM > Hi to all on the list, > > I just finished building my K3 kit a few weeks ago > (4175). All went well, > and the new xcvr is up & running with no problems. > The antenna setup at my qth is a single cable from the > entrance panel at the > house going out to tower #1, through a remote antenna > switch to select from > antennas on that tower or another connection going to tower > #2. At tower #2 > is another remote antenna switch to select various antennas > on that tower. > In the shack I have an amp for 160-10 meters, and an amp > for 6 meters. > I would like to connect my single cable coming in from the > entrance panel to > a 2 way coax switch, with one of the ports going to > my 160-10 meter amp, > and the other going to my 6 meter amp. Then the > 160-10 amp would be > connected to the K3 antenna connector 1, and the 6 meter > amp would be > connected to K3 antenna connector 2. > Both amps will operate at the legal limit easily, and my > concern is that > when xmitting through one of the antenna connectors & > amp, I will put too > much rf back through the coax switch to the unused K3 > antenna connector, and > possibly damage the K3. > I have been changing cabling manually but would really like > to be able to > just operate a switch to make the change. > So, if anyone on the list doing something similar to what I > have in mind, I > sure would like to hear about your setup, what kind of > switch you are using, > how much port to port isolation is necessary to be safe, > etc. > > Tnx & 73, > Tim - N3XX > > ______________________________________________________________ > 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 > ______________________________________________________________ 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 ______________________________________________________________ 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
