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 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 |
| 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 straight as an arrow.
7 MHz four elements full size beam PA7-4-18HD. Beautiful antenna view.
YouTube video about PA7-4-18HD:
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