TETRA 15 10-15-20-40 DUALFEED is a super compact multiband yagi antenna.
On 40 meters, it features a Reflector / Driver configuration. The element size has been compacted using loads placed at the ends of the elements. This solution, originally adopted by W6NL, allows maintaining full-size performance while limiting dimensions.
On 20 meters, it uses a reflector, driver, and director configuration, while on 15 and 10 meters, there are 4 active elements in a reflector, driver, and two directors configuration.
The antenna requires 2 coaxial cables: the first feeds the 40-meter band, and the second feeds the 10/15/20-meter bands.
The dual feed allows contest stations to use this antenna as a multi/monoband antenna: while one RTX transmits on 10/15/20 meters, a second RTX can operate simultaneously on 40 meters.
Suitable for crank-up towers with 70cm side
Requires a medium/heavy-duty rotor
RF choke: 3kW included
Availability: Normally delivered within 2/3 weeks
| TETRA15 10/15/20/40DF | 10 m | 15 m | 20 m | 40 m |
|---|---|---|---|---|
| Gain dBi: (at 20 meters above ground) |
15.6 | 13.8 | 12.5 | 11.0 |
| Gain dBd free space: | 7.9 | 6.0 | 5.2 | 4.2 |
| F/B: | 25 | 25 | 25 | 20 |
| Active elements: | 6 | 4 | 3 | 2 |
| Bandwidth KHz SWR ≤ 1.5:1 |
800 | 450 | 350 | 200 |
| Boom length: | 850 cm | |||
| Turning radius: | 860 cm | |||
| Feedlines required: | 2x 50 Ohm | |||
| Max side of crank-up tower: | 70 cm | |||
Longest element: 1560 cm
Applicable power: 10 kW
Wind surface: 1.87 m²
Wind load 130Km/h: 1525 N
Wind survival*: 130 Km/h
Mast attachment: 40/60 mm (larger on request)
Balun: 3 KW included, 5/10 KW to be purchased separately)
Weight (packaging excluded): 90 Kg
MATERIALS USED
Tubes and plates: aluminum alloy, 6060T6
Bolts and nuts: stainless steel
Insulator shells: UV resistant polypropylene
Manuals available: Italian – English
*Wind survival is the maximum wind speed the antenna can withstand without permanent deformation (value calculated without ice)
