DUO9 15 20

DUO9 15/20

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MOMOBEAM PENTA10 10/12/15/17/20

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Penta10 10/12/15/17/20 m yagi antenna
TETRA18 10/15/20/40 DF multiband yagi antenna

TETRA18 10/15/20/40 DF

$ 6,090.00

TETRA18 10/15/20/40 DF

$ 6,090.00

TETRA18 10/15/20/40 DUALFEED is a high performance and versatile quad-band Yagi. On 40 meters it has a Reflector/Driver configuration and the size of the elements has been compacted using loads placed at the ends of the elements. This solution, which was originally adopted by W6NL, allows you to maintain the performance of a full size yagi by limiting antenna dimensions. On 10/15/20 meters it features full size elements and a classic configuration: 4 elements on 20, 5 elements on 15 and 7 elements on 10 meters.
No traps or other adaptation systems have been used on this antenna, nor are there any moving parts: no motors or relays that risk breaking! Highly reliable and durable aluminum products are used in the manufacture of this amazing antenna system!
The dual feed systems allow contest stations to use this antenna as a multi/monoband: while one transceiver/amplifier setup transmits on 10/15/20 meters, a second station can operate simultaneously on 40 meters (requires additional BPF to protect your equipment).

TETRA18 10/15/20/40 DUALFEED comes with an Assembly Tool and spare parts (bolts and a pair of aluminium tubes).
N.2  3kW RF Choke balun is also supplied as standard. This component is very expensive and many antenna manufacturers supply it as an optional extra.

Simple and intuitive assembly – TETRA18 10/15/20/40DF use square boom. All hardware is supplied in separate, labelled bags and all aluminium tubes are labelled to make assembly quick and easy!

Requires 2 coaxial cables, one for the 40 meter band and the second feeds the 10/15/20 meter bands.
Requires a rotor for a heavy load

RF choke:2X 3kW included

Availability: call!

For US market:
more questions? call Mark K1RX

 603-973-5963 | 
contact him by WA | 
 send an email

4 U-bolt 50/60 mm (2-2.3 in) INCLUDED
If you need larger ones,
please choose below:

2x 3kW RF choke SO239 PLUG INCLUDED
If you prefer,
choose below different RF choke:

SKU: TETRA18 10-15-20-40 DF Categories: , , , , ,


TETRA18 10/15/20/40 DF10 m
15 m
20 m
40 m
Gain dBi:
(20 meters above the ground)
Gain dBd free space:
Active elements:7542
Bandwidth kHz
S.W.R. ≤ 1.5:1
Boom Length:1140 cm/37.4 ft
Turning radius:960 cm/31.5 ft
Feed lines required:2 X 50 Ohm
Max tower lift side:150 cm/4.92 ft

Longest element:
1700 cm / 56 ft

Power handling:
10 kW

Wind area:
2.5 m²/26.9 sq ft

Wind load 130Km/h:
1525 N

Wind survival*:
160 Kmh – 100 Mph

Tower Leg/Mast diameter:  50/60 mm – 2/2.36 inch
(larger on request – specify on order form)

RF choke**:
2x 3 KW included

Weight (excluding packaging):
130 Kg/286 lb

Materials used

Tubes and plates:
Aluminum alloy 6060T6

stainless steel

insulating clamps:
polypropylene UV resistant


*Wind survival is the maximum wind speed to which the antenna can be subjected without incurring permanent deformation (calculated in the absence of ice)

**The Momobeam RF Choke (standard product offering, rated at 3 KW) is made from high quality Teflon dielectric, double shielded, low loss coaxial cable with properly selected ferrite material that is sleeved over the cable that together, create a high impedance path for RF, providing high isolation between the antenna and coaxial feedline.

An SO-239 female connector is included for convenient attachment to the customer feedline and its PL-259 Male connector.

The 5 KW and 10 KW rated RF chokes (optional purchase) are made from the same materials except the coaxial cable is 10 mm diameter.

The 10KW version uses a 7/16 DIN style connector.

Get the manual

TETRA18 10152040DF User Manual EN 940 KB 29 downloads

User Manual TETRA18 10152040DF ...
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