NEW From 2013 Vortex Tornado Dual-Bander for 20 and 12m

NEW From 2013 Vortex Tornado Dual-Bander for 20 and 12m

Vortex Tornado Yagi - 4/5 Element Dual-Band Yagi Antenna for 20 and 12m

£1,500.00 — £1,600.00

Product Code – Tornado Yagi 20M4 12M5
A 4/5 element dual-band Yagi Antenna for the 20 and 12m bands from our Tornado ‘Heavy Duty’ range.
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. 20m elements use 5 sections (30, 25, 20, 16 and 12mm element tubes) and 12m elements use 20, 16 and 12mm 6082-T6 tubes. All EZNEC models have the ‘Taper Schedule’ included so you can be sure of accurate modelling simulations.

From time to time we get requests to model unusual band arrangements. Here we have combined 4 elements on 20m and 5 elements on 12m and using careful spacing and inductive coupling, only one feed line is required for the both bands. All elements are full size with no traps or loading so you are guaranteed mono-band performance with 4 active elements on 20m and 5 on 12m – all on a boom length of 9.8m. Because of optimised modelling, the impedance of the array gives a wonderful flat SWR and covers the whole of BOTH bands.

The antenna is supplied with all hardware except boom to mast mount (see below).

Large antennas such as this model also come complete with an additional  horizontal strut/support. This support is used to reduce boom sag and anchors the boom at the front and at the rear 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. 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.

See info below for mechanical and electrical details

  Vortex Tornado Yagi – 4/5 Element Dual-Band Antenna for 20 and 12m

Band(s):  20m (14MHz) and 12m (24.9MHz)
Element Material:  6082-T6/*AA6082-T6
Boom Material:  6082-T6 box section aluminium
Boom Length:  9.8m
Gain:   8.85dbi (20m) and 9.5dbi (12m)
Front to Back Ratio:   16.93db (20m) and 16.05db (12m)
Feed:   Coax via SO239 socket x 1
Matching:   None – Direct 50 ohm feed single coax feed
Rating:   5kw
Active Elements:   4 on 20m, 5 on 12m
Element Clamps:   Stauff (Germany) – heavy duty polyamide series
Antenna Weight:   55kg
Longest Element Length:   10.88m
Hardware:   304/316 stainless steel

*If available