7 Element OWA (Optimised Wideband Antenna) Yagi (Heavy Duty) – 15m

7 Element OWA (Optimised Wideband Antenna) Yagi (Heavy Duty) - 15m

A 7 Element Heavy Duty OWA (Optimised Wideband Antenna) Yagi Antenna for15m

£1,750.00 — £1,830.00

Product Code – 15M7TORHEAVY

A 7 element OWA (Optimised Wideband Array) high performance Yagi Antenna for the 15m band from our Tornado ‘Heavy Duty’ range. Manufactured from lightweight but extremely strong construction grade 6082-T6 Aluminium stock with a heavy duty boom.

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.

Large antennas such as this model also come complete with an additional ‘T-Bar’ horizontal strut/support. This support is used to reduce boom sag and anchors the boom in six (6) locations, 2 at the front, 2 in the center and 2 at the rear which is nessesary on long boom antennas. By using six support points also reduces the sideways movement of the boom. For our guying line we use ‘Mastrant’ 4mm synthetic guy line which is rated at 400kgs. To compliment the setup, S3i 316 Marine Grade Stainless Steel Eyebolts, Turnbuckles and Hardware finish the project.

Like other antennas in the ‘Tornado’ range, this antenna is manufactured from lightweight but extremely strong construction grade 6082-T6 Aluminium stock with a heavy duty boom. The antenna includes Heavy Duty Element Brackets, Heavy Duty Polyamide Element Clamps and comes complete with M10 Stainless Steel Hardware. The antenna is supplied with all hardware except boom to mast mount (see below).

VORTEX BOOM TO MAST PLATES
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.

SHIPPING – Please contact us first so we can quote on a bespoke shipping service for you.
UK buyers can take advantage of boom sections in complete 5 or 6m sections which saves on cutting and re-joining

See info below for mechanical and electrical details

  7 Element OWA Yagi Antenna (Heavy Duty) – 15m

Band(s):  15m (21Mhz)
Element Material:  6082-T6/*AA6082-T6
Boom Material:  6082-T6 box section aluminium
Boom Length:  16.9m
Gain:   Typical 12.06dBi
Front to Back Ratio:   Better than 20db, 24.16db ay 21.250MHz
Feed:   Coax via SO239 socket
Matching:   None – direct feed. Elements spaced for 50 ohms match
Rating:   5kw
Bandwidth:   Full coverage under 1.3 to 1
Element Clamps:   Stauff (Germany) – heavy duty polyamide series
Antenna Weight:   75kg
Longest Element Length:   7.10m
Hardware:   304/316 stainless steel

*If available