Also note that the Blocking Dynamic Range of the FT-5000 is approximately 13-15 dB worse than the K3's, as per the Sherwood and ARRL lab test data. That mean his rx will desense on much weaker local signals than the K3.
Eric www.elecraft.com _..._ On Dec 13, 2012, at 11:24 AM, William Hein <[email protected]> wrote: > I am currently operating barefoot at my new-ish (moved here one year ago) QTH > in Glade Park CO with a K3 and a Cushcraft vertical antenna. (Much nicer > antennas going up in the next few weeks and more power once I get 220V to the > shack). > > I have a neighbor, Jerry K0DU, who lives about 4 miles away and is an active > contester. We can see each other's QTHs from our respective shacks across a > high elevation Colorado plateau. Needless to say we have no trouble hearing > each other. > > I have noticed that I can get within 2-kHz of Jerry when he's operating CW > with at full 1.5-kW output with no clicks or elevated tx noise. I can see a > giant signal on the P3 but can't hear a thing once I'm 2-kHz either side. > This underscores how nice the K3 rx is. I have a full set of accessory CW > roofing filters. > > After the 10m test recently Jerry emailed me "...(Jerry's guest op) came > across you several times on CW... heard buckshot or key clicks out of the > pass band of our receiver up & down the band" This suprised since I had > noted during the contest how close I could operate to Jerry. And he was > running his linear and I was operating barefoot. Jerry has a FTdx5000 so I > don't think poor selectivity or bad rx design is the issue. I confirmed that > Jerry's 5000 did not have the NB engaged during the 10m test. > > What can I do to check my K3 for transmitted key clicks and other unwanted > emissions? How to do to eliminate same once I confirm the problem? Frankly, > I Jerry's transmissions don't bother me reciprocity didcates than my > transmissions shouldn't bother him especially with an order-of-magnitude > different to transmitted power. > > The Cushcraft vertical (an R8) sometimes has high SWR spikes. Since its > being decommissioned soon and I've been running low power I haven't bothered > to trouble shoot it. Could this be contributing to the clicks/"buckshot"? > > I'll run some tests with Jerry after I have a plan of attack. > > 73 > Bill > > ----- > William Hein, AA7XT > (ex-AA4XT, NT1Y, AA6TT, KC6EDP) > > AMSAT Life Member > ARRL Life Member > UKSMG Member > > 1st W to OH0 QSO on 6m > 1st North America to Asia QSO on 60m > Founder of TopBand email reflector > > Web www.AA7XT.com > Tel +1 (970) 628-5120 > Email [email protected] > Loc: DM59pa > Web twitter.com/williamhein > AIM / iChat / iMessage [email protected] > Skype williamhein > about.me/williamhein# > > > > ______________________________________________________________ > 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
