On August 8, 2005 07:03 pm, W3FPR - Don Wilhelm wrote: > If your antenna is end fed (like the example of an end fed dipole), the > impdance at the antenna feedpoint will be high, but if the feedline is an > odd multiple of a 1/4 wave (elecrtical), the impedance presented to the > shack loaction should be low. At other lengths, the impedance at the input > to the feedline will be high or low or something in between and will depend > on the length of the feedline. Whether it is better to use a 1:1 balun or > a 4:1 balun depends on the answer to these questions.
So lets take a worst case example of a 160 meter half wave antenna, and use it on all bands 160 through 10 meters including the WARC bands to align with the capabilities of the K2/100. As the electrical length of the antenna and feedline will vary with frequency, different bands will have very different characteristics. I suspect that on some bands this antenna system including the BL1 balun will be very efficient and will be able to be matched by the KAT100, however I also expect that on other bands it will be problematic. I would worry that a BL1 balun would become quite inefficient at some frequencies. Do I understand this correctly? -- Darrell Bellerive Amateur Radio Stations VA7TO and VE7CLA Grand Forks, British Columbia, Canada _______________________________________________ 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
