40M2 – 2 Element 40m Yagi Antenna (Loaded Heavy Duty)

40M2 - 2 Element 40m Yagi Antenna (Loaded Heavy Duty)

A Two Element Heavy Duty Coil Loaded Yagi Antenna for the 40m (7MHz) band


Product Code – 40M2TORHEAVY

A coil loaded 2 element Yagi antenna for the 40m band from the Vortex Antenna Systems ‘Heavy Duty’ range. Manufactured from extremely strong construction grade 6082-T6 Aluminium stock with a heavy duty boom wide-spaced High-Q loading coils. The ‘Heavy Duty’ range includes HD Element Brackets and Heavy Duty Polyamide Element Clamps, these come complete with Stainless Steel Hardware. Antenna is supplied with all related hardware including the boom to mast mount.

As the higher bands start to decline with reduced sunspot activity, the lower bands (particularly 40m) are becoming extremely popular. Vortex now offer a reduced size 40m 2 element array with two very high-efficiency loading coils on each element. A full size 40m Yagi spreads well over 20 meters in wing span and for many locations this size is prohibitive. Using a large diameter high-Q loading coil on each of the element legs, we have produced an antenna that is only 13 meters long (only just longer than a 20m dipole) – just 6.4m for each leg. Performance is only marginally lower than a full size 2 element Yagi and also a nice front to back of over 15dbi – pretty good for any 2 element Yagi!

We use our own bespoke loading coil which is over 15cms in diameter and compromises of 6.35mm aluminium tubing with around 27mm spacing between the coil loops. The loop is additionally secured using 2xNylon 6 10mm spacers which keeps it extremely rigid with virtually no flexing. The metallic fittings of the spacer are PTFE sleeved giving the coils a very high power rating and this additional ‘Belt n’ Braces approach to insulating reduces the risk of any RF flash-over.
As the antenna has a slightly natural lower radiation resistance (around 30 ohms), this will match well with a hairpin assembly which we include.

We ship the antenna with a support brace of Mastrant synthetic guying material which reduces element sag at the element ends. One is included for each element.

Quote from one user Bob, G3XFA. “On air it works great. Better than my Ultrabeam UB-40MX and much sturdier with the great Vortex build quality. Saying that, Steve has made it quite lightweight for a 40m antenna. The antenna has been up only one day and this morning I was working ZL at 5/9++. The front to back for a 2 element is really good. I’m estimating 4 ‘S’ units so up to 20db and double that on the sides. For some reason the coils seem to be enhancing the front to back as a normal full-sized 2 element Yagi is only about 12db at best. The nice wide-spaced coils easily handle QRO without any issues and SWR bandwidth is 1.7 max at the band edges.”

See info below for mechanical and electrical details

  2 Element Yagi Antenna (Heavy Duty) – 40m

Band(s):  40m (7.0MHz)
Element Material:  6082-T6/*AA6082-T6, six sections with 38.1mm/10G inner support.
Boom Material:  6082-T6 box section aluminium
Boom Length:  7.4m
Gain:   5.56dBi
Front to Back Ratio:   15.15db modelled although coils seem to boost to up to 20db
Feed:   Coax via SO239 socket
Matching:   Hairpin match (included)
Bandwidth:   300Khz at 1.7:1 or better
Element support:   Mastrant 3mm synthetic guys and stainless supports
Rating:   5kw
Element Clamps:   Stauff (Germany) – Group 5 heavy duty polyamide series
Antenna Weight:   38kg
Longest Element Length:   13m
Hardware:   304/316 stainless steel

*If available