40 METER 1/4 WAVE VERTICAL WIRE-MONOPOLE by W8AMZ

 

The W8AMZ 40m Vertical Wire Monopole antenna uses just three elements, a vertical driven element and two counterpoise radials, to deliver outstanding

DX results due to the antenna‟s omni-directional radiation pattern and extremely low 22 degree take-off angle. A standard half-wave dipole for 40 meters would need to be 90 feet above ground to achieve the same radiation angle. Another outstanding benefit of this antenna is its very low profile/low visibility design. Its compact size makes this antenna ideal for field operations like camping, backpacking, Field Day, portable QRP, or even just rolled up in your EMCOM go bag. Don‟t forget however, this antenna‟s rugged, durable design makes it an excellent choice for permanent installation also.

The W8AMZ 40m Vertical Wire Monopole antenna is capable of the full legal 2Kw limit and is built with the same 100% waterproof design as our popular “Classic G5RV” antenna. The lightweight center interface and strain relief for each element are also designed for maximum durability and reliability for many years of dependable service. The installation requirements for this antenna are fairly straightforward.

The vertical driven element needs to be suspended from about 45 feet. Keep in mind you need 34 feet for the vertical element, and the center interface needs to be at least five to ten feet off the ground. Both radial elements should be suspended so that each are as straight and level as possible, also at least five to ten feet off the ground to minimize ground losses.

In order to achieve the low radiation angle and omni-directional radiation pattern using only two bottom elements, the radials have to be inline, 180º apart

 

 

 

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