Big Wheel for 2m, 70cm and 6m

Big Wheel

The "Big Wheel" is a horizontal polarized omni directional antenna. Usually highly directional antennas are used on VHF and UHF, which have the capability to bundle the radiated energy in one direction and eliminate interferences from unwanted directions. But these effects are not always welcome. With directional antennas it is nearly impossible to monitor a frequency for signals from any direction. Usually the directional antenna stays in the direction where the most signals are expected from and some rare contact in an other direction is lost. In such cases the Big Wheel is an ideal antenna which should be used together with a directional antenna.

Big Wheel antennas by WiMo are made of stainless aluminum, all other hardware is made of stainless steel. The antenna gain is approx. 3 dBD, each Big Wheel has a N-jack (female). By vertical stacking of two Big Wheels you get a gain of approx. 5 dBD. To connect two antennas to one coax feed a usual phasing harness can be used.

6m Big Wheel
6m Big Wheel

Technical data

Technical Data Big Wheel
Frequency Range 144-146 430-440 50-52 MHz
Gain ca. 3 ca. 3 ca. 3 dBD
SWR 1,2 … 1,5 1,2 … 1,5 1,2 … 1,5
Max. Power 500 200 1000 Watt
Impedance 50 50 50 Ω
Diameter ca. 1,2 ca. 0,34 ca. 3,6 m
Max. Mast Diameter 65 50 65 mm
Weight 0,7 0,3 Kg
Stacking distance 1300 430 3800 mm
Connector N socket N socket N socket
Material AlMgSi 0.5, Screw Stainless steel AlMgSi 0.5, Screw Stainless steel AlMgSi 0.5, Screw Stainless steel
Order No.
18007 Big Wheel 144 MHz 87.50 € Buy now In stock, shipped in 1 or two days.
18008 Big Wheel 432 MHz 76.40 € Buy now In stock, shipped in 1 or two days.
18009 Big Wheel 50 MHz 125.00 € Buy now In stock, shipped in 1 or two days.
Info freight charges
Download: Data sheet BigWheel 144 MHz (PDF, de/en)
Download: Data sheet BigWheel 432 MHz (PDF, de/en)
Download: Data sheet BigWheel 50 MHz (PDF, de/en)
Download: Test review from magazine "MEGAHERTZ" 9/00 (PDF, fr)

Stacking of Big Wheel Antennas

To achieve a higher gain, Big Wheel antennas can be stocked vertically.
With a 2m antenna and a 1.3m stocking distance you'll reach the following gain:

Number antennas Gain Info
1 Radiation pattern
2 6.99 dBi Radiation pattern
4 9.95 dBi Radiation pattern
8 12.96 dBi Radiation pattern
10 13.94 dBi Radiation pattern
12 14.72 dBi Radiation pattern
(Radiation patterns (c) DM1BLE)

The antennas need to be connected by cables of exactly the same length which are then summarized by a dual (quad, octa) splitter. The splitter solution also works with high transmission power (> 100W)

Order No.
18040 2-way Power Splitter 2m, N female connectors 63.50 € Buy now In stock, shipped in 1 or two days.
18041 4-way Power Splitter 2m, N female connectors 74.90 € Buy now In stock, shipped in 1 or two days.
18042 2-way Power Splitter 70cm, N female connectors 61.40 € Buy now In stock, shipped in 1 or two days.
18043 4-way Power Splitter 70cm, N female connectors 74.50 € Buy now Not in stock, back in 30 days.
18045 4-way Power Splitter 23cm, N female connectors 71.70 € Buy now In stock, shipped in 1 or two days.
40340.1 CLF-400 or Ecoflex-10 LowLoss Cable 1m, N-male/N-male 29.70 € Buy now In stock, shipped in 1 or two days.
40340.2 CLF-400 or Ecoflex-10 LowLoss Cable 1m, N-male/N-male 32.90 € Buy now In stock, shipped in 1 or two days.
18046 Phasing harness 2m 35.00 € Buy now In stock, shipped in 1 or two days.
18048 Phasing harness 70cm 35.00 € Buy now In stock, shipped in 1 or two days.
42005 N connector solder, for phasing harness (RG-58) 4.50 € Buy now In stock, shipped in 1 or two days.
42203 N connector crimp, for phasing harness (RG-58) 3.90 € Buy now In stock, shipped in 1 or two days.
Info freight charges

Big Wheels at OZ7IGY

Big Wheels at OZ7IGY:
each 1x for 6m and 4m, 2x for 2m and 3x for 70cm.

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