Antennas

Posted by kd1na on Dec 10, 2011; 8:25pm
URL: http://elecraft.85.s1.nabble.com/Antennas-tp7082240.html

I get my elecraft mail in journal form so my response is delayed. I had to mention that people who make broad statements about feed lines and antennas should check the antenna book and handbook before producing the wrong information.

Here is an example:

"The impedance of the feed line does not change the impedance of the antenna.  A half wave length dipole at the proper height is still a 50 ohm feed regardless of whether it's fed with 50ohm line or 600 ohm line."

Last time I checked a dipole (single wire 1/2 wavelength center fed) is 75 ohms. The part of the statement about impedance of the feed line is correct but with swr on the feedline the apparent impedance can can different
Happy Holidays everyone.
73
Dave KD1NA

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