NEW From 2014 – Vortex F5 Tornado+ High Performance Tri-Bander for 20, 17 and 15m

NEW From 2014 - Vortex F5 Tornado+ High Performance Tri-Bander for 20, 17 and 15m

Vortex F5 Tornado Yagi - 3/3/4 Element Tri-Band Yagi Antenna for 20, 17 and 15m

£1,200.00 — £1,350.00

Product Code – F5 Tornado Plus Tri-Band Yagi
A 3/3/4 element tri-band interlaced Yagi Antenna for the 20, 17 and 15m 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 manufactured from 10mm solid 6082-T6 aluminium plates, Heavy Duty Polyamide Stauff Element Clamps and comes complete with M10 Stainless Steel Hardware and stainless saddle clamps making it extremely sturdy.

This is a new design based around our F5 Tornado 10/15 and 20m antenna. With careful re-modelling of the elements, we have achieved an antenna that is an excellent performer on all 3 bands and using careful spacing and inductive coupling, only one feed line is required for the 20m driven element. The 17 and 15m drivers are inductively coupled and do not require any separate feed-line connection. All elements are full size with no traps or loading so you are guaranteed mono-band full QRO performance with 3 active elements on 20m, 3 on 17 and 4 on 15m – all on a boom length of just over 7m.

The EZNEC plots show an excellent match across the whole of 20m and a near perfect match on 17m. With 15m the antenna covers whole band with an SWR of under 1.5 to 1. Front to Back Ratios on all three bands exceeds 20db.

The antenna is supplied with all hardware except boom to mast mount (see below). We can also supply the antenna in a heavy-duty format using a round boom. This boom comes in 3 different diameters these being 76.2mm by 3.25mm wall, 69.85mm by 3.25mm wall and 63.5mm by 3.25mm wall. The boom sections are machined to give a snug telescoping fit.

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).

Images currently show our Tornado F5 for 20/15 and 10m – we hope to update these to live Tornado F5+ Images shortly

See info below for mechanical and electrical details

  Vortex F5 Tornado+ Yagi – Tri-Band Yagi Antenna for 15, 17 and 20m

Band(s):  15m (21Mhz), 17m (18MHz) and 20m (14MHz)
Element Material:  6082-T6/*AA6082-T6
Boom Material:  6082-T6 box section aluminium
Boom Length:  7.25m
Active Elements:  4 on 15m, 3 on 17m, 3 on 20m
Gain:   8.94dbi (15m), 7.97dbi (17m), 7.45dbi (20m)
Front to Back Ratio:   22.11db (15m), 20.29db (17m), 21.35db (20m)
Feed:   Coax via SO239 socket x 1
Matching:   None – Direct 50 ohm feed
Rating:   5kw
Element Clamps:   Stauff (Germany) – heavy duty polyamide series
Antenna Weight:   42kg
Longest Element Length:   10.78m
Hardware:   304/316 stainless steel

*If available