40 meter full size heavy duty Yagi antenna on 18 meter boom PA7-4-18HD

The best antenna for 40m competitions.

 

 

Electrical Specifications PA7-4-18HD

Frequency Range: 7 – 7.2 MHz
Free Space Forward Gain: 8.7 dBi
Front-to-Back Ratio: 21 dB
3 dB Horizontal Beamwidth: 61°
Polarization: Horizontal
Nominal Input Impedance: 50 Ohms
SWR Across Entire Band: < 1.5
Maximum Power Input: More than 3 kW (up to 10 kW versions)
Matching Method: Direct feed through a current balun.
Connector: SO239, “N” or 7/16 DIN

Mechanical Specifications PA7-4-18HD

Number of Elements: 4 full-size elements
Elements Diameter: Tapered elements. Central 48 mm, last 8 mm
Longest Element: 23 m
Element Mounting Position: Below the Boom
Boom Length: 17.2 m
Boom Size: 100 x 100 mm + 80 x 80 Aluminum
The number of Boom Pieces: 6 or 3. Customized by order
Guy rope support: Yes, 8 x Stainless Steel 5 mm rope support
Balun and Connector: Included
Mounting Mast Diameter: 60 – 650 mm. Customized by order
Turning radius: 16 m
Surface Area: 2 m2
Element Survival Wind Speed: 130 km/h
Net Weight: 186 kg
Gross Weight: 200 kg
Transportation Length: 3 m or 6 m. Customized by order

Storytelling through pictures:
40m Monster Yagi antenna. Guy rope support.

Last wire inspection.

Each element is secured additionally with 4 ropes:

The boom support is made of 8 pcs. 5mm thick Stainless Steel ropes.

Starting element diameter 48mm.

Full Size Yagi Antenna. 4 elements for 40m band. Elements are as straight as an arrow.

7 MHz four elements full size beam PA7-4-18HD. Beautiful antenna view.

YouTube video about PA7-4-18HD: