Description
The big wheel is designed for use together with
a yagi system, in order to pick up quickly a sig-
nal from any direction without the need, to turn
the yagi array around to find a signal from
somewhere.
It’s a horizontal
polarized omnidirectional
antenna
, when stacking 2 antennas together,
you get a antenna with about 5dBD gain.
The stacking distance for the 2m version is
about 1300mm (51.18 inches), as stacking har-
ness our phasing line #18040 can be used (cut
both wire lengths to the same length!). Take
care to mount both antennas in same orienta-
tion!
The stacking distance for the 70cm version is
about 430mm (16.92 inches).
Use our phasing line #18042 for stacking.
Assembly
The antennas come preassembled. The 70cm
version is complete assembled, the 2m version
must be assembled by customer.
Loosen the screws #1 and #2, push element #3
inside the black PVC-body and fix the screws
again. See picture below. Take care:
•
the screws have differnet lengths: screw #1
is a bit longer than screw #2.
•
Do not loosen all screws at the same time,
the preassembled main body of the antenna
could fall apart.
Repeat these steps 3 times. There’s no tuning
required.
Big Wheel 2m Big Wheel 70cm
Frequency
144-146
430-440
MHz
Gain
ca. 3
ca.3
dBD
SWR
1,2 ... 1,5
1,2 ... 1,5
Max. Power
500
500
Watt
Impedance
50
50
Ohm
Wheel dia. (ft.)
3.7
1
ft.
Wheel dia. (m)
ca. 1,2
ca. 0,34
m
Max. Mast.
65
50
mm
Weight
0.7
0.3
kg
Stacking disatnce
1300
430
mm
Used phasing line
for stacking
18046
18048
Connector
N jack
N jack
Material
Aluminium, screws stainless
Order no.
18007
18008
Big Wheel
horizontal polarized omnidirectional antennas
WiMo Antennen und Elektronik GmbH
Am Gäxwald 14, D-76863 Herxheim Tel. (07276) 96680 FAX: 6978
http://www.wimo.com e-mail: info@wimo.com
