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Grazioli Antennas MV3 HF Tri-Band 20/15/10M Vertical Ground Plane Antennas
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The Grazioli Antennas MV3 is a base-fed 1/4-wave tri-band vertical ground plane antenna designed for operation on the 20, 15, and 10-meter Amateur Radio bands. Engi
The Grazioli Antennas MV3 is a base-fed 1/4-wave tri-band vertical ground plane antenna designed for operation on the 20, 15, and 10-meter Amateur Radio bands. Engineered to provide an excellent balance of performance, durability, and low visual impact, the MV3 is an ideal solution for operators seeking a compact multiband antenna without sacrificing efficiency. Standing 18.5 ft (5.63 m) tall and weighing just 11.0 lb (5 kg), the MV3 is lightweight yet rugged, making it suitable for a wide range of installations while typically requiring no guying under normal conditions.
Constructed from premium AW6063-T66 alumin
Constructed from premium AW6063-T66 alumin
The Grazioli Antennas MV3 is a base-fed 1/4-wave tri-band vertical ground plane antenna designed for operation on the 20, 15, and 10-meter Amateur Radio bands. Engineered to provide an excellent balance of performance, durability, and low visual impact, the MV3 is an ideal solution for operators seeking a compact multiband antenna without sacrificing efficiency. Standing 18.5 ft (5.63 m) tall and weighing just 11.0 lb (5 kg), the MV3 is lightweight yet rugged, making it suitable for a wide range of installations while typically requiring no guying under normal conditions.
Constructed from premium AW6063-T66 aluminum alloy tubing, precision CNC-machined aluminum components, and high-quality AISI 304 and AISI 316 stainless steel hardware, the MV3 is built to provide years of dependable service in demanding outdoor environments. The antenna is rated for up to 3 kW continuous power in all operating modes and includes a detailed assembly manual along with a unique serial number identifying the production batch and manufacturing data for quality traceability.
Note: For installations in areas subject to exceptionally high winds, the use of non-conductive guy ropes is recommended for additional mechanical support.
High-Performance Tri-Band Design
The MV3 is a resonant vertical antenna designed specifically for operation on the 20, 15, and 10-meter amateur bands. Its direct-feed design eliminates the need for impedance transformers or matching devices that could introduce losses or limit power-handling capability. By utilizing a resonant feed system, the antenna maintains efficient RF power transfer while supporting its full 3 kW continuous power rating.
The antenna incorporates a high-impedance inductive network that creates a DC-grounded condition, helping to dissipate atmospheric electrical disturbances and electrostatic charges that may accumulate on the antenna structure.
DBFC Counterpoise System
The MV3 incorporates Grazioli's DBFC (Dual Band Folded Counterpoise) system, a unique counterpoise design that enhances operation across all supported bands while maintaining a compact installation footprint. The system utilizes four aluminum radial elements measuring 7.9 ft (2.4 m) each, along with an additional radial constructed from AISI 316 stainless steel cable.
This arrangement eliminates the need for loaded radial systems or long wire radials spread across a roof or property. The DBFC design assists with maintaining proper antenna operation even in installations located near the ground or on rooftop structures while preserving efficiency and simplifying installation.
FAIR-RITE RF Choke System
The MV3 is supplied with an original FAIR-RITE FT240-43 ferrite toroid, manufactured in the USA, for construction of a high-performance RF choke. When installed directly below the antenna feed point, the choke significantly attenuates common-mode currents within the HF spectrum from 1.8 to 30 MHz. This helps maximize antenna performance while reducing unwanted RF current on the feed line.
Proprietary High-Power UHF Connector
Rather than utilizing a conventional commercial SO-239 connector, the MV3 features a proprietary connector designed and manufactured by Grazioli. The connector provides a true 50-ohm characteristic impedance and is rated for operation up to 500 MHz.
Heavy-Duty Mounting System
The MV3 mounting bracket is fabricated from 0.098 in (2.5 mm) thick AISI 304 stainless steel and secures to the antenna through a robust clamping system that provides exceptional mechanical strength. Mast attachment is accomplished using an AISI 304 stainless steel M6 V-bolt and column-nut assembly, ensuring a secure installation and long-term reliability in outdoor operating environments.
Constructed from premium AW6063-T66 aluminum alloy tubing, precision CNC-machined aluminum components, and high-quality AISI 304 and AISI 316 stainless steel hardware, the MV3 is built to provide years of dependable service in demanding outdoor environments. The antenna is rated for up to 3 kW continuous power in all operating modes and includes a detailed assembly manual along with a unique serial number identifying the production batch and manufacturing data for quality traceability.
Note: For installations in areas subject to exceptionally high winds, the use of non-conductive guy ropes is recommended for additional mechanical support.
High-Performance Tri-Band Design
The MV3 is a resonant vertical antenna designed specifically for operation on the 20, 15, and 10-meter amateur bands. Its direct-feed design eliminates the need for impedance transformers or matching devices that could introduce losses or limit power-handling capability. By utilizing a resonant feed system, the antenna maintains efficient RF power transfer while supporting its full 3 kW continuous power rating.
The antenna incorporates a high-impedance inductive network that creates a DC-grounded condition, helping to dissipate atmospheric electrical disturbances and electrostatic charges that may accumulate on the antenna structure.
DBFC Counterpoise System
The MV3 incorporates Grazioli's DBFC (Dual Band Folded Counterpoise) system, a unique counterpoise design that enhances operation across all supported bands while maintaining a compact installation footprint. The system utilizes four aluminum radial elements measuring 7.9 ft (2.4 m) each, along with an additional radial constructed from AISI 316 stainless steel cable.
This arrangement eliminates the need for loaded radial systems or long wire radials spread across a roof or property. The DBFC design assists with maintaining proper antenna operation even in installations located near the ground or on rooftop structures while preserving efficiency and simplifying installation.
FAIR-RITE RF Choke System
The MV3 is supplied with an original FAIR-RITE FT240-43 ferrite toroid, manufactured in the USA, for construction of a high-performance RF choke. When installed directly below the antenna feed point, the choke significantly attenuates common-mode currents within the HF spectrum from 1.8 to 30 MHz. This helps maximize antenna performance while reducing unwanted RF current on the feed line.
Proprietary High-Power UHF Connector
Rather than utilizing a conventional commercial SO-239 connector, the MV3 features a proprietary connector designed and manufactured by Grazioli. The connector provides a true 50-ohm characteristic impedance and is rated for operation up to 500 MHz.
Heavy-Duty Mounting System
The MV3 mounting bracket is fabricated from 0.098 in (2.5 mm) thick AISI 304 stainless steel and secures to the antenna through a robust clamping system that provides exceptional mechanical strength. Mast attachment is accomplished using an AISI 304 stainless steel M6 V-bolt and column-nut assembly, ensuring a secure installation and long-term reliability in outdoor operating environments.
Antenna, Vertical, MV3, Multiband, 1/4-Wave, HF 20/15/10M, 18.5ft. Height, Max Power: 3kW Continuous All-Modes, UHF SO-239 Connector, Each
Part Number: GRZ-8050030
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today