4 Element Delta Loop (Heavy Duty) – 20m

4 Element Delta Loop (Heavy Duty) - 20m

A 4 Element Heavy Duty Delta Loop Antenna for the 20m (14MHz) band.


Product Code – 20M4WWHEAVY

A 4 element Delta Loop for the 20m band from our ‘Heavy Duty’ range. Manufactured from lightweight but extremely strong construction grade 6082-T6 Aluminium stock with a heavy duty boom. All 20m Delta Loops have 5 sections of aluminium tubing for the vertical sections as standard. The antenna also includes our 304 A2 Stainless Steel 10mm Heavy Duty Element Brackets (x4) with additional M8 stainless tension support bars, H/Duty Polyamide Element Clamps and comes complete with M10 Stainless Hardware. 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 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 Mastrant4mm 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 and various boom to mast mount options (see below).

Because of the boom length, this antenna uses 3 sections of boom which includes a 70mm x 4mm wall center boom section, 2 middle sections of 60mm x 4mm wall and 2 outer pieces of 2 inch (50.8mm) 6082-T6 square section stock.

The top wires on each loop are manufactured from copper-clad steel (in essence copper coated stainless steel) which is extremely strong and robust. The breaking strain of this alone is over 250kgs. This wire is the secured using marine-grade (316 stainless) hardware and Vortex’s unique “Cable Strain Relief Mechanism” which pretty well eliminates a top-wire failure. Download our TOP-WIRE info sheet. The antenna is supplied with all hardware except boom to mast mount (see below).

See info below for mechanical and electrical details

  4 Element Delta Loop (Heavy Duty) – 20m

Band(s):  20m (14Mhz)
Element Material:  6082-T6/*AA6082-T6
Boom Material:  6082-T6 box section aluminium
Element Brackets: 304 A2 Stainless Steel 10mm Heavy Duty Element Brackets (x4)
Boom Length:  11.15m
Gain:   10.31dbi
Front to Back Ratio:   Better than 20db (27.73db at 14.250MHz)
Feed:   Coax via SO239 socket
Matching:   Vortex Gamma Match (PTFE dialectric)
Rating:   3.5kw
Element Clamps:   Stauff (Germany) – heavy duty polyamide series
Loop Top Wire:   2mm copper clad steel
Antenna Weight:   63kg
Optional High Wind Element Support Kit: More info here
Hardware:   304/316 stainless steel

*If available