Diamond Antenna A144S10 User manual

A144S5 & A144S10
2 Meter Yagi Antenna
Specications
Frequency:
:niaG
Power Rating:
Impedance:
VSWR:
Front To Back Ratio:
Boom Length:
Longest Element:
Driven Element diameter:
Parasitic Elements diameter:
Max. Mount diameter:
Weight:
Connector:
Antenna Assembly
(1) Remove antenna from package and adjust elements to proper position.You will nd a small mark on the center of each
element to aid in its positioning. Tighten each wingnut after verifying proper positioning.
(2) Weatherproong connections. As coaxial cables tend to absorb moisture through their connectors, it is recommended
that the connector be sealed. There are several products available for this purpose, including a good grade of electrical type
or a rubber compound tape.
Figure 2
DIAMOND ANTENNA Products are distributed by RF PARTS COMPANY
435 S. Pacic S treet San Marcos, CA 920 78 [phone]
www.diamondantenna.net
←6” →
Fabricated
extension
↑
Figure 1
A144S5 (5 Element) A144S10 (10 Element)
144-148 MHz
9.1dBi
100W PEP, 50W FM
50 Ohms (Nominal)
1.4:1 (Nominal)
More than 14 dB
37.4” 950mm
42.9” 1090mm
0.50” 12.7mm
0.37” 9.4mm
1.5”
1.8 lbs. 0.81 kg
SO-239 UHF Female
144-148 MHz
11.6 dBi
100W PEP, 50W FM
50 Ohms (Nominal)
1.4:1 (Nominal)
More than 15 dB
83.8” 2130mm
42.9” 1090mm
0.50” 12.7mm
0.37” 9.4mm
1.5”
2.4 lbs. 0.81 kg
SO-239 UHF Female

The Diamond 2 Meter Beam Antennas are easy to assemble and install. Only a few cautions are necessary in their installation.
TheA144S5 may be installed for either vertical or horizontal polarization.
(a) Vertical polarization (preferred for FM operation): If mounting to a vertical support or pole at the boom center, be
sure this support is non-metallic.Aberglass or waterproofed hardwood extension should work satisfactorily. End mounting is a
good option, as the coax cable may be run along the boom and down the vertical support. The idea is to minimize the eects of
metal in the vertical plain. It will be necessary to fabricate an extension capable of sliding inside the boom, being secured by the
screw passing through the boom (at the reector element). Another way of mounting vertical beams is on a bracket to position
beam away from the vertical support in order to reduce its eects. Coax should be run away from the beam at right angles (or o
the reector end). See Figure 2.
(b) Horizontal mounting to the vertical support is easily accomplished with center boom mounting.
(c) Phasing of two beams may be accomplished with a special coax phasing section using 75 ohm coaxial cable and T-
connector. Length approximately 2140 mm / 84 inches. Beam separation of approximately 40”-48” is recommended.
Note that the two antennas are mounted to the stacking boom in the same position. The cable connection must enter
each from the same side as shown in Figure 4.
Figure 3
Tighten Wingnuts
Position element for
center marker
Figure 4