I got the kit John talks about and made the antenna. Its was quick and fun to make. I have a question about it though. I had a 70' wire that I had been using just for RX to test a IC-718 and I hooked it up to the UNUN box instead of the 30' wire that came with the kit. Its below 2:1 on 6m, 12m, 17m, 40m and less then 4:1 on 10, 20m, 80m and about 6:1 on 30m, 160m. The only really high one is 60m. So really all but 60m are tunable by the KX3 tuner board. I am using what I remember to be about 15' of RG-58/U. My Shack area is on the second floor of the house and the wire goes out my window and down to the back fence.
My problem is I am getting RF coming back into the shack (on just 5W) where it will reset my USB hub a few feet away from the radio. Not fun when trying to work digital modes. This only happens on some bands but I know happens on 20m where I try and work the most. I expect its just the ones less resonate that its doing it on but I need to check again. Will adding a number of ferrite on the feed line help choke the RF? Will winding the feed line around a tube to make an air choke work? I guess that one is cheep enough I should just try it. Buying 10 or more ferrite to clamp to the line costs more ;) What about using a longer feed line? I really don't want to add a counterpoise and the instructions said it does not need one. I could use the 30' antenna wire it came with if that is going to help. I would not think so since its resonate on so many bands and tunable on the others. Thanks for the help! Jeff, K7GDE On May 31, 2013, at 10:56 AM, John Saxon <[email protected]> wrote: > The "Emergency Amateur Radio Club" in Hawaii sells an antenna that has worked > for my needs. They sell a 30' length of wire and an UNUN fitted with a > SO-259. I got a 33' telescoping fiberglass pole from MFJ. I attached the > pole to my back fence (6' wooden). It only takes a couple of minutes to > attach the wire and host up the pole. Collapsing the pole also a couple of > minutes. > > The antenna is here... > http://earchi.org/92011endfedfiles/Endfed6_40.pdf > John > K5ENQ ______________________________________________________________ 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
