4 Element OWA Yagi (Optimised Wideband Antenna) Superlight 11m

4 Element OWA Yagi (Optimised Wideband Antenna) Superlight 11m

A 4 Element Superlight 'OWA Yagi - (Optimised Wideband Antenna) for 11m.

£325.00 — £355.00


A 4 element Yagi Antenna based on the ‘OWA’ Optimised Wideband Antenna design. For a number of years experimenters and designers (and in particular the wise words from W4RNL) have re-modelled a Yagi which give a very flat response over its operating bandwidth. The OWA design requires one additional director element to achieve the 50 Ohm feed point impedance compared to beams with feed point impedances in the 25 Ohm range. By placing this director closer towards the driven element, a flat low SWR curve is achieved at an impedance of around 50 ohms with good front to back figures. You can see from the chart the exceptionally low SWR figures. This design focus’s on bandwidth as the prime requirement and the antenna has a low SWR between 26 and 28Mhz. The system requires no matching device and can be connected directly to 50 ohm coax. We would however recommend including a 1 to 1 Current Balun at the feed point to prevent radiation of common-mode currents back down the feeder.

Like other antennas in the ‘Tornado’ range, this OWA is manufactured from lightweight but extremely strong construction grade 6082-T6 Aluminium stock and being part of the ‘Superlight’ series is designed for minimum weight so is ideal for portable/feild day as well as a permanent installation. The antenna includes Heavy Duty Element Brackets, Standard Duty Polyamide ‘Stauff’ Element Clamps and comes complete with Stainless Steel Hardware.
Antenna is supplied with all hardware except boom to mast mount (see below).

All VORTEX Antennas can be shipped WITHOUT any boom to mast mounting plates. Select this option from the drop-down menu when purchasing. Other options include the choice of mounting plates and complete mounting solutions with U-Bolts and Brackets.

See info below for mechanical and electrical details

  4 Element OWA Yagi Antenna (Heavy Duty) – 11m

Band(s):  11m (26 and 27Mhz)
Element Material:  6082-T6/*AA6082-T6
Boom Material:  6082-T6 box section aluminium
Boom Length:  4.15m
Gain:   8.13dbi typical at 27.500Mhz
Front to Back Ratio:   Better than 20db typical (22.16db at 27.400MHz)
Feed:   Coax via SO239 socket
Matching:   None – Element spacing designed to achieve 50ohms
Rating:   5kw
Element Clamps:   Stauff (Germany) – standard duty polyamide series
Antenna Weight: 8kg
Longest Element Length:   5.32m
Hardware:   304/316 stainless steel

*If available