QUICK GUIDE
HF AUTOMATIC TUNING ANTENNA
ah-760
Thank you for purchasing the AH-760 HF AUTOMATIC
TUNING ANTENNA. The AH-760 operates with your
transceiver between 1.6 and 30 MHz.
Please read these guide thoroughly before installing and
operating the AH-760.
IMPORTANT!
The antenna is a critical element in any communication system. Correct installation is very important factor for achieving the
utmost in antenna system performance and operation of your transceiver. We recommend that installation of the AH-760 HF
AUTOMATIC TUNING ANTENNA be carried out by qualified technicians only.
PRECAUTIONS
■
R
DANGER HIGH VOLTAGE! NEVER
touch the antenna terminal, ground ter-
minal or antenna while transmitting. Place the AH-760 in a position where no one can
touch them.
NEVER
use the antenna system without a ground connection.
USE
the ground terminals for the ground connection. The mounting plate is not inter-
nally connected.
DO NOT
operate your HF transceiver without running the vehicle’s engine. When the
transceiver’s power is ON and your vehicle’s engine is OFF, the vehicle’s battery will
soon become exhausted.
DO NOT
use the AH-760 in areas where the temperature is below –30°C or above
+60°C.
FOR TRAFFIC SAFETY
Use the original Antenna Mounting Systems, which cover most of installations sce-
narios on virtually any type of vehicle to ensure the best communications and compli-
ance with traffic safety guidelines.
INSTALLATION
■
Select or fabricate a strong metal bracket for the antenna plate, about 8–10 mm
(0.31–0.39 inches) thick, and weld or bolt it firmly to the vehicle chassis or other
strong structure. For the greatest radiation effectiveness, position antenna as high as
possible. For human safety, mount the antenna at the front and opposite side of the
steering wheel, whenever possible. Refer to the pictorial installations and scenarios
shown in the overleaf. Make sure to allow enough clearance around antenna so that
any antenna flexing will not damage the vehicle — bear in mind that Main Assembly
can flex as much as 16 cm (0.63 inches), without damage. Make sure the upper 2/3rds
of the antenna Main Assembly is as far from the vehicle’s vertical and horizontal metal
panels as possible. Use the antenna Level Mark for reference. Mount the antenna
on the bracket plate provided with a 17 mm (0.67 inches) hole for the M16
×
2 mm
(M0.63
×
0.08 inches) threaded mounting stud. Rotate the Main Assembly until VENT
and EARTH STRAP are directed towards the vehicle body, and then firmly tighten the
stud nut. Use only the original hardware and proper tools.
RF-GROUND:
It is absolutely essential that the antenna is connected to an effective and stabile RF
GROUND POINT — the vehicle chassis. It is further recommended that body panels
are also bonded to the vehicle chassis. Make sure all contact points are free of paint
and ground to a shiny finish and protected from rusting with conductive grease, before
bolting the mounting stud and ground strap terminals.
CABLING:
Three cables are supplied with each antenna — a coaxial cable, a control cable and
an adapter cable. A ground strap is provided on the base of the antenna to ensure a
reliable connection with the vehicle’s metalwork. Connect the ground strap to both the
chassis frame and the cabin metalwork, whenever possible. Avoid feeding the anten-
na cables together with the engine ignition cabling routes. Use a ground terminal for
the entire HF system where your transceiver is installed. Feed both (B+ and B–) thick
wires from the vehicle battery to the R/T location. Do not use the vehicle’s metalwork
as a replacement of the B– wire. Refer to typical correct installation cabling diagram
for the location of antenna cables and connection points.
Useful Tips:
1. When the antenna is not being used, re-
move the whip section. 2. Regularly check
all bolt joints and cables/connectors. 3. To
improve short distance communications
(30–300 km), order the optional AH-5NV.
Use original accessories and feel free to ask
for assistance.
VEHICLE BATTERY
IC-F8101
STATION GND
EARTH STRAP
M16 STUD
DTL5015
SEAC
PL259
RF I/O
LEVEL
MARK
USB
VENT
WHIP
CONTR
OL CABLE,
5.5 m (18 ft)
ADAPTOR CABLE,
0.5 m (1.6 ft)
COAXIAL CABLE,
6 m (19.7 ft)
SPRIN
G
MAIN ASSEMBL
Y
12 V
–
+
VEHICLE CHASSI
S
RF GR
OUND POIN
T
