INSTRUCTIONS
AUTOMATIC ANTENNA TUNER
Thank you for choosing this Icom product.
READ ALL INSTRUCTIONS
carefully and completely
before using this product.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan
Jan. 2022
A7669W-1EX
Printed in Japan
© 2022 Icom Inc.
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AH-730
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Important
SAVE THESE INSTRUCTIONS
— These instructions
contain important operating instructions for the AH-730.
■
Precaution
R
DANGER! NEVER
operate the antenna tuner without a solid
ground. Always connect the ground wire to the ground terminal.
DO
NOT
use the mounting plate as a ground terminal.
R
DANGER! NEVER
transmit or tune without an antenna
connected. Failure to use an antenna will damage the antenna tuner.
R
DANGER! HIGH VOLTAGE! NEVER
touch the antenna while
transmitting or tuning. Place the antenna in a position where you
are sure it will not be touched.
KEEP
the antenna tuner away from heavy rain and never immerse
it in water. The antenna tuner meets IPX4 requirements for splash
resistance. However, once the antenna tuner has been dropped, splash
resistance cannot be guaranteed due to the fact that the antenna tuner
may be cracked or the waterproof seal damaged, and so on.
Ground terminal
Mounting plate
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Features
•
Wide tuning range
The AH-730 provides reliable matching from 1.8 MHz to
54 MHz when using at least a 7 m (23 ft) antenna or 3.5
MHz to 54 MHz when using the AH-2b
antenna element
.
•
Automatic digital control tuning
The built-in 32 bit microprocessor chooses the lowest
SWR using more than 1,040,000 different LC (coil/
capacitor) combinations.
•
45 frequency memories for fast tuning
The LC combinations of 45 previously-used frequencies
are automatically memorized. Once a frequency is
memorized, the AH-730 tunes on that frequency in less
than 1 second. Note that the AH-730 does not memorize
a frequency which is normally tuned within 2.5 seconds.
Memories are retained only when the power is on.
•
0.3 W radiated power
Radiated power during tuning is less than 0.3 W,
minimizing interference to other stations.
•
IPX4 weatherproof design
The AH-730’s tightly sealed plastic case allows
convenient mounting virtually anywhere. The AH-730 can
be mounted outdoors under your antenna.
NOTE:
The AH-730 can be used with most of Icom HF
transceiver, which covers HF through 50 MHz bands.
However, the IC-706 and IC-736 can only be tuned in the
1.8 ~ 30 MHz range.
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FCC information
This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
CAUTION:
Changes or modifications to this device, not expressly
approved by Icom Inc., could void your authority to operate this
device under FCC regulations.
This device complies with part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference
received, Including interference that may cause undesired operation.
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the
United Kingdom, Germany, France, Spain, Russia, Australia, New Zealand, and/or other countries.
■
Specifications
• Frequency range:
1.8 ~ 54 MHz (with an antenna
longer than 7 m, 23 ft)
3.5 ~ 54 MHz (with the AH-2b)
• Maximum input power: 150 W
•
Input impedance:
50 Ω
• Tuning power required: 5 ~ 15 watts
• Rated voltage:
13.8 V DC ±15%
(current less than 0.7 A)
• Usable temperature range:
–10°C ~ +60°C
(+14°F ~ +140°F)
• VSWR:
2.0 : 1 or less (except antennas
a one half wave or multiple of a
one half wave in length)
• Weight (approximate): 2.5 kg (5.5 lb)
• Dimensions:
230 (W) × 80 (H) × 340 (D) mm,
(projections not included)
9.1 (W) × 3.1 (H) × 13.4 (D) inches
L
All stated specifications are typical and subject to change without
notice or obligation.
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Options
•
OPC-1465
shielded control cable
Cable length (approximate): 10 m, 32.8 ft
The same as supplied.
•
AH-2b
antenna element
A 2.5 m long antenna element for mobile operation with AH-730.
Frequency coverage: 3.5 ~ 54 MHz with the AH-730.
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Supplied accessories
U-bolts
Hex head bolts (M6 × 50)
U-bolt plates
Self-tapping screws
(A0 6 × 30)
Flat washers (M6 large)
Weatherproof
cap
Rubber
vulcanizing tape
Control cable
(Approximately 10 m, 32.8 ft
(without ground wires))
Flat washers (M6 small)
Spring washers (M6)
Nuts (M6)
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Installation
D
Mounting examples
R
DANGER! HIGH VOLTAGE! NEVER
touch the antenna while transmitting or tuning. Place the antenna in a position where
you are sure it will not be touched.
AH-2b + long wire
AH-2b
antenna element
(optional)
Long wire
Long wire
Icom is not responsible for the destruction, damage to, or
performance of any Icom or non-Icom equipment, if the
malfunction is because of:
• Force majeure, including, but not limited to, fires,
earthquakes, storms, floods, lightning, other natural disasters,
disturbances, riots, war, or radioactive contamination.
• The use of Icom antenna tuners with any equipment
that is not manufactured or approved by Icom.
■
Operation
Tuning is required for each frequency. Be sure to retune
the antenna before transmitting when you change the
frequency— even slightly.
Example: IC-7300
1. Turn ON the transceiver.
• Each time you push
TUNER
, “TUNE” is displayed or goes
out, and the AH-730 is turned ON or OFF (bypassed).
2. Hold down
TUNER
for 1 second to start manual tuning.
• The antenna tuner reduces the SWR to less than 2:1 after 2 ~
3 seconds of tuning.
L
While tuning, “TUNE” blinks red.
L
If the antenna tuner cannot reduce the SWR to less than 2:1
after 15 seconds of tuning, “TUNE” goes out.
Hold down
TUNER
for 1 second.
3. After tuning, “TUNE” is displayed.
L
When the long wire antenna cannot be tuned, “TUNE” goes out. In
that case, the AH-730 is bypassed and the wire is directly connected.
NOTE:
When the wire antenna cannot be tuned, confirm wire
length and connection. Note that the AH-730 cannot tune a
wire that is a ½λ long or on a multiple of that frequency.
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Explicit definitions
WORD
DEFINITION
R
DANGER!
Personal death, serious injury or an
explosion may occur.
R
WARNING!
Personal injury, fire hazard or electric shock
may occur.
CAUTION
Equipment damage may occur.
NOTE
If disregarded, inconvenience only. No risk
of personal injury, fire or electric shock.
Below statement is for UKCA purpose only
United Kingdom Authorised Importer: Icom (UK) Ltd.
Address: Blacksole House, Altira Park, Herne Bay, Kent,
CT6 6GZ, U.K.
