On Mon, 5 Sep 2005 20:23:28 +1200, Nigel wrote: >3) Balun at the ant (?:1) plus RG213 to tuner
This is a good configuration if the antenna is long enough to load on all the bands on which you want to use it. BUT, with a feedline only 5m long, and a transmitter power of only 100 watts, RG-213 is larger than you need. RG-59 or RG-8X would work just fine unless you want to run much more power. Feedlines must be far longer than 5m before losses or standing waves become a problem, and the smaller cable will be both more manageable and less visible. One other consideration though. If you want to load the antenna as a long wire against "ground" or a counterpoise, you would not want a balun at the antenna, and would need balanced line with a balun at the antenna tuner. I use this configuration for a limited space antenna here in a Chicago residential neighborhood as my only antenna for 160 and an alternative antenna for 80 (that works better in some directions than the same wire loaded as a dipole). See http://audiosystemsgroup.com/K9YC/k9yc160TopLoad.htm and http://audiosystemsgroup.com/K9YC/k9ycant.htm 73, Jim K9YC _______________________________________________ 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
