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INSTRUCTION MANUAL

New2001

AH-740

HF AUTOMATIC TUNING ANTENNA

* The “stand” in the photo is not

supplied with the tuning antenna.

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Summary of Contents for AH-740

Page 1: ...INSTRUCTION MANUAL New2001 AH 740 HF AUTOMATIC TUNING ANTENNA The stand in the photo is not supplied with the tuning antenna...

Page 2: ...ty and installation instruc tions EXPLICIT DEFINITIONS WORD DEFINITION R DANGER Personal death serious injury or an ex plosion may occur R WARNING Personal injury fire hazard or electric shock may occ...

Page 3: ...58 F TABLE OF CONTENTS FOREWORD i IMPORTANT i EXPLICIT DEFINITIONS i FEATURES i PRECAUTIONS ii TABLE OF CONTENTS ii SUPPLIED ACCESSORIES iii MISCELLANEOUS ITEMS iii 1 SYSTEM INSTALLATION 1 Ground conn...

Page 4: ...e Whip antenna 1 r Antenna spring 1 t Bolts M8 2 y Nuts M8 2 u Spring washers M8 2 i Flat washers M8 4 o Spring washer M16 1 0 Nut M16 1 1 Flat washer M16 1 MISCELLANEOUS ITEMS The following items are...

Page 5: ...ble Avoid feeding the antenna cables together with the engine ignition cabling routes Use a One Point Star Station Ground for the entire HF system where your transceiver is installed Feed both B and B...

Page 6: ...unting System front and a cus tomer provided bracket middle Both methods provide effec tive communications in all directions Recommended installation options on a typical sedan vehicle use a Universal...

Page 7: ...e and skywave distances between 50 and 650 km 30 and 400 miles The radio waves from the antenna travel upwards into the ionosphere and then are refracted back down in a circular area The signals can b...

Page 8: ...e AH 740 securely with the supplied nuts and bolts Otherwise vibrations and shocks due to rough terrain could loosen the antenna It could fall causing per sonal injury For the greatest radiation effec...

Page 9: ...bles to protect the e e inside connections Connect the coaxial cable and the control cable to the transceiver Connect the coaxial cable to an appropriate antenna connector Connect the control cable to...

Page 10: ...2 allen wrench Use allen wrench to tighten 6 mm 1 4 Swivel magnet holder Place the swivel magnet holder onto the vehicle and at q q tach the NVIS antenna element to the antenna spring of the AH 740 Se...

Page 11: ...5 kg 7 7 lb All stated specifications are subject to change without notice or obligation Control connector information D D KEY START 13 8 V Front view GND SHIELD NC Options AH 5NV nvis kit Approximate...

Page 12: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan New2001 A 7088H 1EX Printed in Japan 2013 Icom Inc...

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