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.

For different bands and different lengths, here is a chart that is helpful. The figures are not exact with this example, but they are close enough for ham radio.

Formula

(A) One element length is:

One leg 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.