The Extended Double Zepp (EDZ) Antenna 20 Meters
Leg: 44 feet Leg: 44 feet
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Stub: 9 feet 6 inches (450 Ohm Ladder Line)
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Coax to transmitter (50 Ohm any length)
It’s Time To Put Up The 20 Meter EDZ And Add 3-dB Gain Over Your Dipole!
This 20 Meter Extended Double Zepp (EDZ) antenna should produce a 3-dB over the average half-wave dipole. This is significant enough to try it. An automatic tuner should tune this antenna with no problem. If one should feel it necessary, a 1:1 Balun would do the job.
Basically, the Extended Double Zepp Antenna is a pair of 5/8 wave elements. The total length is approximately 1.25 wavelengths long.
Formula
(A) One leg length (quarter wave) is… 625/F (MHz)
(B) Stub length is… 142/F (MHz)
The 12 Meter EDZ Antenna
The same principles apply for the 12 Meter EDZ. For each leg, use 25 feet 3 inches. For the stub, use 5 feet 5 inches.
