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DUO5 30 40T

DUO5 30/40T SF

$ 3,990.00

DUO5 30/40T SF

$ 3,990.00

(1 customer review)

DUO5 30/40T SF is a spectacular dualband yagi for the 7 and 10 MHz bands with incredible performance. On 30 meters it has three full size elements with Reflector/Driver/Director configuration; on 40 meters it has two elements with a Reflector/Driver configuration with compact size using loads placed at the ends of the elements. This solution, which was originally adopted by W6NL, allows to maintain the performance of a full size by reducing the size of the elements. Consequently, the performance of this antenna is comparable to a fullsize and both bands are fully usable with SWR below 1.5:1 on over 200 kHz.
It will no longer be necessary, during installation, to choose the portion of the band for which to optimize the antenna (typical characteristic of antennas with coils). You will have top performance!

Simple and intuitive assembly – DUO5 30/40 use square boom. All hardware is supplied in separate, labelled bags and all aluminium tubes are labelled to make assembly quick and easy!

Requires two coaxial cables
Requires a medium / heavy duty rotor

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:


DUO5 30/40T30 m
40 m
Gain dBi:
(20 meters above the ground)
Gain dBd free space:4.854.2
Active elements:32
Bandwidth kHz
S.W.R. ≤ 1.5:1
Boom Length:700 cm/23 ft
Turning radius:975 cm/32 ft
Feed lines required:2 X 50 Ohm
Max tower lift side:70 cm/2.29 ft

Longest element:
1820 cm/59.70 ft

Power handling:
10 kW

Wind area:
0.9 m²/9.68 sq ft

Wind load 130Km/h:
730 N

Wind survival*:
130 Kmh – 80 Mph

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

RF Choke**:
2 x 3kW included

Weight (excluding packaging):
70 Kg/155 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

DUO5 3040SF User Manual EN 940 KB 19 downloads

User Manual DUO5 3040SF ...
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    1 review for DUO5 30/40T SF

    1. Emanuele IW9GDC

      Giuseppe IT9HBT, Owner of MomoBeam assisted me after a storm destroyed my previous antenna and he came highly recommended to me by a close friend. After having a general call with Giuseppe about my requirements, it was clear he was highly competent and an expert in his field. Giuseppe gave me comprehensive advice and guided me on choosing the right antenna for my needs. After much discussion we decided that due to the high winds in my hometown of Messina, we would opt for an antenna that can withstand high wind. After the antenna was custom built, we ran into a challenge not only with shipping due to the size but also challenges with the pandemic and Giuseppe went above and beyond and drove the antenna to my home which was over 350KM. After 3 days assembling the antenna, I could clearly see the high quality of the materials and parts used with the nuts and bolts being made of stainless steel, which will have a long life. A very important feature for my usage is that the antenna has 2 separate feed lines and can be used in SO2R. The antenna was seamless to assemble and when needing any spare parts or pieces for general maintenance , Giuseppe took care of my needs free of charge. The antenna has been in use since August 2020 and has been hit by incredibly strong winds and it is still working perfectly ever since installation. The lobe is wide at 40 MT and in 30MT the antenna gain is outstanding (3 elements full sides). Thanks to the performance in 30MT I was able to work most wanted #2 which was Bouvet 3Y0J! Money well spent because the antenna outperforms what I expected.

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