ELECTRICAL SPECIFICATIONS
Frequency Range	144~146MHz& 430~440 MHz
Impedance	50Ω
VSWR	＜1.5
Gain	144~146MHz( 9.5dBi ) , 430~440 MHz ( 11.15 dBi)
Horizontal Beam Width	53° 144~146MHz  45° 430~440 MHz
Vertical Beam Width	48°144~146MHz  40°430~440 MHz
Front To Back Ratio	＞12 dB
Lighting Protection	Direct Ground
Connector Type	N-K(FEMALE),SO239,UHF FEMALE,SL16-K(FEMALE)
Maximum Power	50W
MECHANICAL SPECIFICATIONS
Dimensions (L/W)	1135×1045 mm
Weight	725g
Rated Wind Velocity	60 m/s
Mounting hardware	Ø30-Ø50 mm

144/430MHz DUAL BAND YAGI ANTENNA

INSTRUCTION MANUAL

 

NOTE PLEASE READ ALL INSTRUCTIONS BEFORE ASSEMBLY

 

FEATURE

 

1. Dual band for 2m/70cm.

2. Independent element type ensures a nice gain and performance in comparison with Mono band.

3. Stainless steel boom, elements and brackets which ensures superior durability and

long performance life in all weather conditions.

4. Light weight, compact and easy to install and re-assemble.

 

SPECIFICATIONS

Type----------------------------- 3-Elements YAGI (145 MHz)

 5-Elements YAGI (435 MHz)

Frequency---------------------- 144-146 / 430-440 MHz

Gain----------------------------- 9.5dBi / 11.15 dBi

Power input-------------------- 50 watts (FM) max.

Impedance---------------------- 50Ohm

FB ratio------------------------- more than 12dB

Boom length------------------- 1,130 mm

Connector---------------------- N Female

Suitable Mast------------------ 30 – 55 mm diameter

Weight-------------------------- 870 g

 

ASSEMBLING

 

1. Identify and arrange the 8-elements and the power feed unit of antenna see color chart.

2. Using flat washer and wing nut join each element and the power feed unit(with Raa and Rab)

according to color code to boom.

3. Insert matching rod A & B into power feed unit.

A(longer bar) should be in the hole farthest from the N female connector. B(shorter bar) should be

in the hole closest to N female connector. Using hex. wrench provided, tighten match rods in

power feed unit with set screws. Attach shorting bars per diagram.

4. Refer to drawing and attach cable clamp on boom forward from location of U-bolt bracket and on the same side as the power feed unit.

5. Mount antenna on mast in either horizontal or vertically(offset if necessary when using a metal

mast – see diagram).

6. Attach coax with N male connector to power feed unit and insert coax into clamp. Use electrical

tape or wire ties to secure coax along boom.

 

VSWR ADJUSTMENT

 

1. Adjust VSWR at center frequency of each band. Move shorting bar further from connector to

raise center frequency where VSWR is optimum.

2. Be sure wing nut assembly is tighened on the shorting bar.