Item Code: 00006
Model: 81-4
Advantages
- A four element, computer optimized Yagi with exceptional bandwidth, ideally suited for weak signal operation
- Easy to assemble, the antenna can be used for both fixed or portable applications, and no tuning is required to achieve peak performance
Features
- Balanced “AntennaFeed” system assures a clean radiation pattern
- Flexible feedline interface simplifies installation and connector waterproofing
- All stainless steel hardware and custom mounting blocks for a trouble free service life
Electrical Specifications
| Frequency Range | 80-82 |
| Gain, dBd | 5 minimum |
| Front to Back Ratio, dB | 6 minimum; 6.5 typical |
| VSWR (50 Ohms) | 1.2:1 typical |
| 1.5:1 bandwidth | 2 minimum; 4 typical |
| 3 dB Beamwidth E/H Planes | 63/98 degrees |
| Power | 200 watts |
| Termination, feet (m), coax | N Female, 4 (1.22), RG58 |
| Polarization | Horizontal or Vertical |
| Stacking Distance, E/H Planes | 10 ft / 6.5 ft |
Mechanical Specifications
| Number of Elements | 4 |
| Boom Length, feet (m) | 7.1 (2.16) |
| Boom Material | 1″ square 6061-T6 aluminum tubing |
| Element Material | 3/4″ 6063-T832 aluminum tubing |
| Mast Diameter, inches (cm) | 1.25-2.00 (3.2-5.1) |
| Mounting | Rear |
| Wind Surface Area, feet² (m²) | 1.67 (.16) |
| Wind Survival | 100 mph (160 kph) |
| Weight | 12 pounds (5.45 kg) |
| Wind Rating | 100/160 |