Hello Tom I'm using a similar setup here for my K2. The dipole is just 60 ft long, a bit under a true half wavelength. However, with the 450 ohm tuned feeders, I use the antenna on 80, 40, 30 and 20 meters. Works very well at a height of 42 ft in center and 35 feet at ends.
Two things will make matching easier. Get two baluns, 1:1 and 4:1. Put them on the two antenna ports of the ATU. Now, when you change bands, put the feeder on the balun that gives you the lowest swr while the ATU is in CAL S. This is effectively bypassing the ATU. Then switch in the ATU and match. From then on, the ATU memory will remember the settings, so you will just have to remember which balun goes with which band or bands. Works very well. Good luck and 73 Bob N6WG -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Tom McCulloch Sent: Saturday, August 20, 2005 6:58 PM To: [email protected] Subject: [Elecraft] Antenna question Hi all, I'm considering putting up a 40 meter dipole fed with a 450 ladder line. I have a K2 which I run at about 5 to watts (I do not have the 100 watt amp). The K2 also has the internal ATU. I have always used 50 ohm coax up until now. Is there anything I should know about using the K2 with 450 ohm feedline? (Will I need a balun, or can I just feed the ladderline directly to the K2's ATU and that will take care of the match. Thanks for your help. Tom, WB2QDG K2 1103 _______________________________________________ Elecraft mailing list Post to: [email protected] 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: [email protected] 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
