1/2/2/3 Element Yagi (Heavy Duty) - Quadband 30/20/15/10m
A 1/2/2/3 Element Quad-Band Interlaced Yagi Antenna for 10, 15, 20 and 30m
£990.00 — £1,080.00
Product Code – 30M1_20M2_15M2_10M3TORHEAVY
A 1/2/2/3 element quad-band interlaced Yagi Antenna for the 10, 15, 20m and 30m 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. All elements on 10, 15 and 20m are full size with no traps or loading. To retain efficiency on 30m, a linear loaded element is used. Linear loading enables the antenna to be shorter than a full-sized model (in this case approx 75% of full size), but retains a performance fairly close to the full size model. An equivalent antenna with traps would be far less efficient. Normally for the 30m band, the full dipole length would be around 14.8m. The Vortex design has leg lengths of only 5.45m each side (18 feet) so is ideal where space is limited or restricted. Compared to a dipole, the single 30m element has slight gain and directivity at approx 3.11dbi.
Large antennas such as this also come complete with an additional ‘T-Bar’ horizontal strut/support. This support is used to reduce boom sag and anchors the boom in four (4) locations, 2 at the front and 2 at the rear. By using four support points (rather than two) – also reduces the sideways movement of the boom. For our guying line we use ‘Mastrant’ 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
1/2/2/3 Element Yagi (Heavy Duty) – Quadband 30/20/15/10m
Band(s): 30/20/15/10m (10, 14, 21 and 28MHz)
Element Material: 6082-T6/*AA6082-T6
Boom Material: 6082-T6 box section aluminium
Boom Length: 5.7m
Gain: 7.95dbi (10m), 5.90dbi (15m), 6.18dbi (20m), 3.11dbi (30m)
Front to Back Ratio: 32.24db (10m), 11.56db (15m), 10.96db (20m), 1.59db (30m)
Feed: Coax via SO239 socket x 4
Matching: Vortex Gamma Match x 4 (PTFE dialectric)
Element Clamps: Stauff (Germany) – heavy duty polyamide series
Antenna Weight: 38kg
Active Elements: 3 on 10m, 2 on 15m, 2 on 20m, 1 on 30m
Longest Element Length (30m): 11m
Hardware: 304/316 stainless steel