Single Element Coil Loaded ‘Spacesaver’ Dipole (Heavy Duty) – 20m

Single Element Coil Loaded 'Spacesaver' Dipole (Heavy Duty) - 20m

Single Element Coil Loaded 'Spacesaver' Dipole (Heavy Duty) - 20m

£475.00 — £525.00

New for 2017. A single element coil loaded dipole antenna for the 20m band from our new range of ‘Coil Loaded Space-saver Antennas’ . Loading enables the antenna to be shorter than a full-sized model (in this case around 65% of full size), but because the coil is exceptionally heavy duty and very low-loss, it retains a performance fairly close to the full size model. An equivalent antenna with traps would be far less efficient. Normally a full sized dipole for the 20m band would have a half-leg dipole length of around 5m (16.5 feet) The Vortex design has half-leg lengths of only 3.25m (11.75 feet) each side so is ideal where space is limited or restricted.

The heart of the antenna is the extremely efficient loading coil. We use 6.35mm (.25 inch) aluminium tubing with 4.5 turns which is professionally wound. The coil diameter is nearly 17.5cms (6.75 inches) with a length of around 13cms (5.25 inches). Each ends of the coil are held in place with M5 studs which are secured to the 30mm tube sections. A 5 cms fibreglass spacing give ample isolation. Each of the coil turns are held firmly by thermoplastic (Nylon6) bars which are extremely rigid. To finish the assembly, M4 stainless fasteners with PTFE sleeves (this prevents flash-overs between the fastener and the coil windings) secure the nylon bars in place. In all – each coil is exceptionally sturdy. The coil former is air and as such losses are kept to a minimum.

The antenna is manufactured from lightweight but extremely strong construction grade 6082-T6 Aluminium stock with a heavy duty boom, the design uses the same high quality hardware and components found in other Vortex designs. The antenna includes Heavy Duty Element Brackets, Heavy Duty Stauff Group 5 Polyamide Element Clamps and comes complete with Stainless Steel Hardware.

See info below for mechanical and electrical details

  Single Element Coil Loaded ‘Spacesaver’ Dipole (Heavy Duty) – 20m

Band(s):  20m (14Mhz)
Element Material:  6082-T6/*AA6082-T6
Boom Material:  6082-T6 box section aluminium
Boom Length:   1.4m
Gain:   1.95dbi
Front to Back Ratio:   0db
Bandwidth: Covers whole band under 2 to 1 SWR
Feed:   Coax via SO239 socket
Matching:   Vortex Hairpin Match
Rating:   3.5kw
Element Clamps:   Stauff (Germany) – heavy duty polyamide series
Antenna Weight:   14kg
Full Element Length:   6.5m
Hardware:   304/316 stainless steel

*If available