> Radio Antennas>HF 0-30 Mhz>Grazioli MV6 vertical multiband HF 1/4λ 3kW antenna
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GRAZIOLI ANTENNE

GRAZIOLI-MV6-2020

New product

Italy

Grazioli MV6 vertical multiband HF 1/4λ 3kW antenna

rating Read the 4 reviews
Average rating: 5/5 Number of reviews: 4

Grazioli MV6 6.75m HF multiband vertical antenna with base feed for the following HAM bands: 20, 17, 15, 12, 10 and 6m. Power up to 3kW continuous, all modes. New version supplied with a torus for making a choke balun*.

Extremely robust AW6063-T66 aluminium alloy construction and CNC machined parts.

Supplied with 304 and 316 stainless steel screws for long term rust free use.

Supplied with: 1 CB Grazioli MV6 Antenna and 1 rigging harness with 3 fixings. Manual in English.

Delivery info: This antenna is considered a large package and carriers apply an extra charge for shipping.

More details

362,94 € tax excl.

374,17 €

In stock

   3 Items

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Instructions balun Grazioli

357.54k

Data sheet

Technical data:

  • Frequency range: HF 20, 17, 15, 12, 10 + VHF 6m
  • Type: 1/4 λ vertical end-fed dipole
  • Impedance: 50Ω unbalanced
  • Radiation: omnidirectional
  • Polarisation: vertical - linear
  • Gain: 0 dBd - 2.15 dBi
  • SWR at resonance: ≤1.5:1
  • Maximum applicable power: 3000 Watts continuous all emission modes
  • Power system: direct - connected to DC ground
  • Connector: female UHF (SO-239) with PTFE insulation, gold-plated centre pin

High quality material : AW6063-T66 alloy of aluminium, magnesium and silicon hardened to T-66 state, which ensures maximum strength. The tubes are extremely accurate in both diameter and wall thickness, allowing for precise coupling without "play" between the tubes.

Specifications:

  • Materials: AW6063-T66 aluminium tube, fibreglass, brass, PTFE, stainless steel screws
  • Wind surface: 0.4m2
  • Wind load at 130Km/h: 19 Kgf
  • Wind resistance: 130 Km/h
  • Total height: 6.75m
  • Whip length: 6.20m
  • Radial length: 2.7m
  • Mast mounting: ø 40-54 mm
  • Net weight: 7,8 Kg

Warning: Installing this product near high voltage lines is dangerous. Follow the instructions for your safety.

* Choke balun construction

The MV6 antenna is now supplied with a USA-made "Fair Rite" toroid to create a choke balun for installation under the antenna to improve performance.

The Choke Balun for the HF band (1.8-30 MHz), to be installed close to the antenna connector, significantly attenuates sheath currents, which can reduce antenna performance and may cause station disturbances or high VSWR.

Grazioli Antenne supplies the original FAIR-RITE ferrite toroid (FT240-43 Made in USA) to create your own high-performance choke balun.

Materials not supplied to be added by the customer for manufacturing:

- 2 PL259 connectors adapted to the type of cable you use. (1 PL259 + 1 SO239 if a plastic protection box is used)
- Approx. 1.2 m of good-quality coaxial cable, type RG58 for continuous power up to 300 Watts at 30 MHz or Teflon-coated RG142BU for continuous power up to 1500 Watt AWG at 30 MHz.

Grazioli absolutely advises against the use of expanded FOAM dielectric cables (spongy white dielectric), as they cannot be wound around the toroid without compromising its electrical characteristics.

Instructions for building the choke balun

Take the coaxial cable, spread it out on a surface and mark half its length with a piece of insulating tape or a marker.

Then insert it into the torus Fig.1 up to the mark, and secure it with a plastic clamp, start winding the coils by passing the cable through the torus at least 5 or 6 times, then make the 5 or 6 turns on the opposite side with the same procedure, until you get the balun like the one in Fig.2.

Secure the winding end with another clamp and your balun is complete. All you need to do now is install the connectors on both sides, and connect one side to the antenna and the other to the coaxial downlink.

If you wish to attach it to the support mast, we recommend placing a thickness of wood or plastic of at least 4 - 5cm between them to prevent them being affected by the metallic mass.

To protect the balun, you can use a plastic box for electrical installations, installing an SO239 on the lower part of the box towards the downline, and a cable gland on the upper side, where the cable that will connect the outgoing antenna is located. Drill one or two holes in the base to drain off any condensation.

construction choke balun

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Reviews

Click here to leave a review

rating 5
antenne
bien
rating 5
VK3AWA
I have to say the Grazioni MV6 is the best quality antenna I have ever seen in my 50 years of being a ham radio operator.
rating 5
Antenne verticale HF MV6
Produit de qualité, en attente de montage et d\'essais radio.
rating 5
Grazioli MV6

I haven't yet built up this antenna, but the kit contents certainly look to be of very high quality.

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