Dan, FWIW, at home I run my KX1 into a trapped 40 meter dipole (only 38ft. long) that is resonate around 7.040. I have a HI-Q 1:1 balun installed and have 75ft of feedline. The dipole is a flattop running NE to SW up about 40 ft. I have worked Alaska and NM and AZ and Southern California to mention just a few of my QRP contacts. I also run 13.8 watts into the unit at home. On the KX1 it shows a .5 Volt drop to 13.5. I have the internal tuner for the KX1 installed and I set it for CAL mode and I get 4+ watts and 1.0 SWR out of it. I can work up to 7.058 and down some with switching to Tun mode.
I also run the unit outdoors into long wires (usuually 28 ft with counterpoises) and use the TUN mode and get very low SWR readings and perhaps a half watt less power. The reduction in power might be attributted to the lower power into the unit. I use a small 2800AH 12 volt batter that charges to about 13.5 and delivers at least 12 volts by the time I use it in the field. Jack Regan, AE6GC -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dan Presley Sent: Tuesday, August 22, 2006 12:13 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KXAT1 with dipole I was out in the woods of Oregon today (up by the coast range town of Jewell) with my KX 1 and a few different antennas. I used a long wire for a while, but then for the heck of it I set up a 40M inverted vee with my portable mast. The KXAT1 had no trouble with the long wire (and counterpoises) bringing it right down to 1:1, but no such luck with the dipole ( cut to resonate on 40, and fed w/RG 174).I've used this antenna a bunch w/ the K2 and it's pretty much a 1:1, but when using the KX1 atu I got around 9:5 SWR! So, I promptly forgot how to bypass the tuner (until I got home and re-read the manual;set it to 'CAL':).But,also in the manual it states that it'll match most coax type dipoles, etc.Elsewhere it's stated that it won't match a half wave length,but I wasn't clear if that's only for a half wave end fed.I'll bet it's the same for a resonant dipole as it's a ground independent half wave, but maybe someone who has come up against this before can clarify as far as the tuner is concerned. I usually bring a separate antenna 'dipper' just to check the antenna in case there's a short or bad coax,etc., but that got left behind. Just for reference, I use the lightweight dipole kit from N2CX with a nice sealed center insulator and RG 174 (I know it's not the most efficient, but for a short run it's fine and very lightweight). I'm still trying to find more of the type of wire he used in there-it's springy yet has a great slick and tough coating which holds up well in trees, etc, It's also a light yellow in color so it blends nicely.N2CX quit making these kits a while back and ran out of that wire.The 'Wireman' sells some similar stuff,(524?) but it's still not the same. Any thought appreciated on the tuner-I'm trying to get as much outdoor radio time in before summer ends:) -- Dan Presley-N7CQR-Portland, Or QRP-L #502 ARS #71 [EMAIL PROTECTED] _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
