Manual
http://www.rigpix.com/antennas/cushc...4-5_manual.pdf
The Cushcraft AV-series of 1/4-wavelength verticals use nine (9) radials.
Tables in the Manual.
Standard Radial Lengths for a Quarter-Wavelength vertical.
40 meters ... start at 35 feet; 80 meters ... start at 66 feet.
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