Alpha OCF Dipole ‘Gorilla Wire’ Antenna

ベース価格: ¥16,315.50


OCF Dipole options

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Overview - This is the Alpha Antenna 6-80 Meter OCF (off-center fed) Dipole.

Very popular! So there’s a bit of a back log.
Next production run will be ready to ship 4/16/2018.
Pre-order now to be at the front of the line.

Introduction - Our engineers are proud to bring you a portable antenna in a revolutionary housing that is both beautiful and functional.

Operation - This 67 foot (44.5x22.5) long 200W PEP SSB antenna is designed for the 6, 10, 20, and 40 meter bands without a tuner. You can also operate 12, 15, 17, 30, 60 and 80 meters plus the WARC bands with a tuner. This is not an inferior OCF Windom design that uses a vertical coaxial radiator and needs some type of choking resistance ("choke balun"). Beware of antennas that do not include 6 meters and also beware of antennas that ‘include’ coax that’s ‘built-in’ to the design of an OCF Dipole. You may find that those antennas have high common mode currents and will often have SWRs between 2.5:1 to +6:1 on 12, 15, 17, 30, 60 and 80 meters.

Deployment - This antenna includes the ability to adjust tuning for differing heights and surroundings, which is done by simply trimming the included extra wire from the elements. These antenna options can also be installed in an inverted V configuration, which changes the feedpoint impedance.

Technical - The OCF Alpha Match is a newly designed balun, which is based upon the dual core 4:1 Guanella balun that delivers 200 ohm impedance characteristics to radiating wire elements, while inherently minimizing common mode current. This design enables the antenna to be fed with a standard 50 ohm coax.

OCF Alpha Match results on a 200 ohm load

SWR Analysis with Balun under 200 ohm load

R, X, & Z Analysis with Balun under 200 ohm load

Smith Chart under 200 ohm load


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