HB9CV 2 Element Yagi (Heavy Duty) – 12m



HB9CV 2 Element Yagi (Heavy Duty) - 12m

A 2 Element Heavy Duty HB9CV Yagi Antenna for the 12m (24.9MHz) band

£310.00 — £340.00

Product Code – 12M2TORHB9CVHEAVY

A 2 element Yagi Antenna for the 12m band based around the design of Swiss radio amateur Rudolf Baumgartner HB9CV.
Here at Vortex we have applied our high end construction methods to make an exceptionally robust antenna. In the HB9CV design, a phasing line is used which means the rear element is fed 180° out of phase using a phasing line.

The Vortex design uses  a length of 12mm aluminium tube which runs along the top of the boom and is supported above the boom by polyamide Stauff clamps. We have also tried other methods of phasing such as RG213 coax but we have now settled for the ‘Tube’ version which also means no coax to deteriorate. The distance between the driven and reflector element is an eighth wavelength which adds another 45°, in all making 225° which makes for an antenna with good gain and excellent front to back figures.  In our previous design we did not use a capacitor, however we find that most users prefer to have some kind of matching adjustment so in this second generation antenna we now include a Vortex PTFE QRO (3.5kw) Gamma Match for adjustment purposes. Resonance can also be moved by changing the lengths of either one or both elements. With the HB9CV the front to back is mainly controlled by the phasing line so small changes in length to the rear element have little effect on the front to back ratio of the array.

The antenna forms part of our Tornado ‘Heavy Duty’ range which is 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.
Antenna is supplied with all hardware except boom to mast mount (see below).

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

  2 Element HB9CV Yagi Antenna (Heavy Duty) – 12m

Band(s):  12m (24.9Mhz)
Element Material:  6082-T6/*AA6082-T6
Boom Material:  6082-T6 box section aluminium
Boom Length:  1.65m
Gain:   6.40dbi
Bandwidth SWR:   Under 1.3 to 1 over whole band
Front to Back Ratio:   Approx 30db at band center
Feed:   Coax via SO239 socket
Matching:   Vortex Gamma Match (PTFE dialectric)
Rating:   3.5kw
Element Clamps:   Stauff (Germany) – heavy duty polyamide series
Antenna Weight:   8kg
Longest Element Length:   5.85m
Hardware:   304/316 stainless steel

*If available