Comet CA-F72GF Instruction Manual

CA-F72GF
MODEL
Thank you for purchasing our products.
For your safety :
Read this manual carefully for proper handling and operation before using.
Keep this manual in a safe place for future reference.

Features

【 】
●High-gain : 5.5dBi base station antenna.
●1-piece heavy-duty fiberglass , durable against weather and pollution.
●Frequency can be easily adjusted following the element cutting chart.
【 】

Specifications

Frequency : 440-480MHz [Tunable element]
Gain : 5.5dBi [Two 5λ/8 waves in phase]
VSWR : 1.5 or less (8MHz bandwidth after
tuning)
Impedance : 50 ohms
Connector : N-Female
Max.Power : 150W(FM)
Weight : approx. 1kg
Length : approx. 1.12m
①Insert the hexagon nut as far as it
will go into the radial thread.
Put one for each radial.
Hex. Nut(M5)
Radial
Hex. Nut
②Insert screw
Spanner
③Fasten
Hex. Nut
◆
Mount Bracket & U-Bolt
U-Bolt
Mount
Bracket
Spring
Hex.Bolt
Washer
M6x30
Spring
Hex.Nut M6
Washer
Heavy duty, high-gain base station antenna
for 440 - 480MHz
【

How To Assemble

1. Assemble three radials. Fasten radial-lock Nuts securely with spanner etc....
2. Put two mount brackets on the mount support pipe. Pass the coax cable through the
pipe,and attach it to power feeding section. Be sure to fasten hex bolts firmly.
Then, attach support pipe onto the antenna.
3. Mount all assembled antennas on your mast.
This antenna is so long. Keep your eyes on balance of this antenna and use as strong
mast as you can, between 30 to 62mm dia.
*Make sure to use low loss coax cable.
Power
Feeding
Section
Connector
M-P (for M-J)
N-P (for N-J)
Mount
support pipe
Mount
support pipe
Note2 : For long-term use, water-proofing with glue, self-fusing tape,
and/or vinyl tape is highly recommended.
This antenna requires adjusting the element length to set the tuning frequency.
Refer to the instructions on page 2 and match the lengths of L-1 and L-2 to the
lengths in the table before installing.
Note 3
●Because high UHF frequency, please use high quality coax.cable and connectors.
●Kindly provide sufficient water-proof works, on connector joint section, for long priod use.
Note 1 : Hybrid hexagon bolt with locking function is used for this product.
Compared to conventional hex bolts, a large tightening torque is required for
tightening work. Please tighten firmly until the end.
】
Lock bolt & spring
washer
(Note:1)
Mount
Bracket
! Precautions for using
● This antenna is only for ham radio. Do not use this for other purposes.
● Operation outside the specification might damage the antenna.
● Adjust the antenna correctly. Elevated SWR could damage the antenna.
● Never attempt to modify or fix the antenna by yourself.
● Do not touch the antenna while transmitting.
Specifications or appearance is subject to change without notice.
Instruction Manual
【 Parts List 】
1. Main antenna
2. Radial
3. Hex. Nut (M5)
4. Mount bracket
5. Mount support pipe
6. Lock bolt w/ sp.washer M6x10
7. Hex.bolt w/ sp.washer M6x30
8. U-Bolt w/sp.washer & Hex.nut
Your 50Ω
coax.cable
(φ30
Make one or two loop,
and fix cable and mast.
3rd edition. May 2020. Printed in JAPAN.
Copyright (C) 2020 COMET CO.,LTD. All Rights Reserved.
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Your mast
～
62mm)