Diamond Antenna A144-S5 User Manual

A144-S5
2 Meter Yagi Antenna
Specifications
Frequency: 144-148 MHz
Gain: 9.1 dBi
Power Rating: 100 Watts
Impedance: 50 Ohms (Nominal)
VSWR: 1.4:1 (Nominal)
Front To Back Ratio: 17 dB
Boom Length: 37.4” 950mm
Longest Element: 42.9” 1090mm
Driven Element diameter: 0.50” 12.7mm
Parasitic Elements diameter: 0.37” 9.4mm
Max. Mount diameter: 1.5”
Weight: 0.4 lbs. 0.81 kg
Antenna Assembly
(1) Remove antenna from package and adjust elements to proper position. You will find a small mark on the center of each
element to aid in its positioning. Tighten each wingnut after verifying proper positioning.
(2) Weatherproofing 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 1
Figure 2
DIAMOND ANTENNA Products are distributed by RF PARTS COMPANY
435 S. Pacific Street • San Marcos, CA 92078 • (760) 744-0900
www.diamondantenna.net
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Diamond Antenna A144-S5 Specifications

General

Type	Yagi
Frequency Range	144-148 MHz
Elements	5
Impedance	50 Ohms
Connector	SO-239
Band	2m
VSWR	1.5:1
Polarization	Horizontal

Summary

Antenna Specifications

Antenna Assembly and Installation

Element Adjustment

Adjusting antenna elements to their correct positions using alignment marks and securing them.

Connection Weatherproofing

Sealing coaxial cable connections to prevent moisture ingress using appropriate tape or sealant.

Vertical Polarization Mounting

Guidelines for mounting the antenna for vertical polarization, emphasizing non-metallic supports.

Horizontal Polarization Mounting

Describes the method for achieving horizontal polarization mounting using center boom support.

Phasing Two Beams

Instructions on phasing two antennas using coaxial cable and T-connectors, including lengths and separation.