The Grazioli Antennas HW10V is a 1/2-wave vertical antenna for the 10 and 11 meter bands and is tunable from 26 to 30 MHz. Fed at the base, the antenna is tuned by adjusting the whip length and fine-tuning a PTFE-insulated high-voltage variable capacitor located at the base. Designed for both 10-meter Amateur band and 11-meter CB band, the HW10V combines a compact 19.5-foot height (5.94m) with rugged construction and continuous power handling up to 3 kW in all operating modes.

High-Q LC Matching Circuit

The HW10V utilizes a specially designed parallel LC matching network to adapt the high feedpoint impedance typical of base-fed 1/2-wave vertical antennas. The high-Q coil is generously sized, air-wound, and free of metal cores, while the coaxial variable capacitor is positioned at the base for convenient tuning. Constructed with PTFE insulation and capable of withstanding voltages exceeding 40kV, the matching system is resistant to temperature changes, rain, humidity, and heat generated during high-power operation. Careful optimization of the inductance and capacitance values results in excellent efficiency, reliable operation, and continuous power handling up to 3kW. The coil is also DC-grounded to help reduce atmospheric noise.

Custom 50-Ohm UHF Connector

The HW10V does not use a standard commercial SO-239 connector. Instead, it is equipped with a proprietary 50-Ohm connector designed and manufactured by Grazioli Antennas. Rated for operation up to 500 MHz, the connector features a nickel-plated CW614N brass body, a 24K gold-plated center pin, and a PTFE insulator. A four-fin support system maintains proper pin alignment and contact pressure while a protective elastomer hood helps prevent moisture intrusion for long-term reliability.

Heavy-Duty Construction

The HW10V is built from AW6063-T66 aluminum alloy tubing and CNC-machined components, with all hardware manufactured from high-quality 304 and 316 stainless steel for excellent corrosion resistance and long service life. The mounting bracket is constructed from 0.098 in (2.5 mm) thick AISI 304 stainless steel and uses a robust clamping system combined with an AISI 304 stainless steel M6 V-bolt mast coupler for secure installation. Each antenna includes a detailed assembly manual and a serial number identifying the production batch and construction data.

Additional Features & Specifications:

Electrical Specifications

• Antenna Type: 1/2-wave end-fed vertical dipole

• Frequency Range: Tunable from 26 to 30 MHz

• Impedance: 50 Ohm, unbalanced

• Radiation Pattern: Omnidirectional

• Polarization: Vertical, linear

• Gain: 0 dBd / 2.15 dBi

• Bandwidth (SWR 2:1): ≥ 1.7 MHz at 28 MHz

• SWR at Resonance: ≤ 1.2:1 typical, ≤ 1.1:1

• Maximum Input Power: 3,000 watts continuous, all modes

• Feed System: High-Q L-C matching circuit with DC-ground design

• Input Connector: 50-Ohm UHF female connector with PTFE insulator and gold-plated center pin

Mechanical Specifications

• Construction Materials: AW6063-T66 hard-drawn aluminum alloy tubing, fiberglass, brass, and PTFE. All hardware is AISI 304 and AISI 316 stainless steel.

• Wind Surface Area: 2.10 sq. ft.

• Wind Load @ 81 MPH: 41.9 lbf (pound-force)

• Wind Survival Rating (No Ice): 81 MPH

• Antenna Height: 19.5 ft. (5.94m)

• Radiator Length: 17.7 ft. (5.38m), 1/2-wave radiator

• Mast Mounting Diameter: 1.57 to 2.13 in.

• Antenna Weight: 6.8 lbs.

• Shipping Carton Dimensions: 5.5 × 5.5 × 57.1 in.

• Shipping Weight: 9.5 lbs.