Hi Ed,
The height of my Tee vertical was determined by the rigging points in
trees to support the ends, with the design guideline that higher is
better. :) The length of the top was then determined by what it took to
get that 50 ohm match.
73, Jim K9YC
On Wed,7/1/2015 2:35 AM, Ed Sawyer wrote:
“Same here. My T vertical for 160 is 100 ft vertical and 82 ft horizontal.
That makes the antenna resonant below the band, with a feedpoint Z of 50
ohms plus some inductive reactance on 160M. I add series C to tune out the
L. The same idea will certainly work on 80M.”
I believe that this antenna is functioning as a 3/8 wave vertical. Which is
nice, but not necessary for good performance.
I have a 70 ft high vertical portion with a total hat of about 45 ft (22.5
ft x 2). It resonates at 1.84Mhz with 20 Ohm impedance. It is fed against
a ground rod and 45 radials – mostly ¼ long.
Works quite well.
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