I have been doing some design work for a vertical that will give me less than 1.3:1 VSWR across the entire 160 Meter band with either very little manual adjustment or with the right circuitry the ant
Jim, I have to go the tower route due to no trees tall enough in this area. And I plan on a 120 radial grouns system. Ted -- Original Message -- Sent : 3/22/2015 6:26:21 PM To : towertalk@contesting.
Grant, If your feedpoint Z is 25 ohms then your antenna is a 90 degree antenna. I cannot use a wire antenna due to lack of tall trees in the area. I could probably switch in combinations of fixed mic
Alfredo, Put as many short radials as you can, but if you can sneak a few a 1/4 wavelength on 160 Meters, they don't have to be straight it would be better. Ted VE6AMR -- Original Message -- From : A
Doug, With your inverted L, how high is the vertical section and what is it made of? Also how long is the horizontal section and how is it made. I will see if I can find a schematic of the SA2550 so
Jim, Looking at the spacing on the 500 pfd. cap in the SA2550 it should be plenty robust for most current fed systems; however the breakdown voltage may not be high enough for a voltage fed high Z sy
I'm looking at a tower that is 137 ft. high and 12 inches on a face. Alowing for shortening due to the length diameter ratio, ths is an electrical 102 degrees on 160. The series capacitane required y
Richard, That is the kind of circuitry I was concidering. I hadn't determined exactly what kind of circuit but the phase detector sounds very good! Ted Clapham VE6AMR -- Original Message -- Karlquist