Compact Antenna Tuner for the IC-705,
Tunable 50 Ω Antenna and Long Wire Antenna


・Covers the 1.8 MHz to 50 MHz bands

30 m, 98.4 ft or longer antenna: 1.8 – 54 MHz, 7 m, 23 ft or longer antenna: 3.5 – 54 MHz
* Depending on operating conditions or environments, the tuner may not be able to tune the antenna.

・SO-239 antenna connector for 50 Ω antenna such as dipole or Yagi

・“Terminal connector”, binding post socket adapter supplied for a long wire antenna

・2-way power sources using alkaline batteries or external 13.8 V DC*

* 13.8 V DC should be taken directly from an external power supply, not through the IC-705.

・IP54 dust-protection and water resistance construction*

* The connectors should be covered with an adhesive tape or a jack cover to prevent water seeping into the connection.

・Full automatic tuning, just push the [TUNER] button on the IC-705

・Latching relays used for saving power consumption

・190 × 105 × 40 mm; 7.5 × 4.1 × 1.6 in, 450 g; 15.8 oz* compact design

* Battery cells are not included.


SWR examples for a 7 m (23 ft) long wire antenna
SWR examples for a 50 MHz Yagi antenna (2-elements)

Introduction for Icom AH-705 Automatic Antenna Tuner


Tunable frequency range 1.8 – 54 MHz (with a 30 m, 98.4 ft or longer wire antenna)
3.5 – 54 MHz (with a 7 m, 23 ft or longer wire antenna)
Maximum input power 10 W
Input impedance 50 Ω
Power requirement for tuning 5 W, 10 W
Tuning time (approximate) Average: 2 – 3 seconds
Maximum: 15 seconds
Power supply requirement Battery: 3.0 V DC (LR6 (AA) alkaline × 2 cells)
DC Input: 13.8 V DC (±15%)
Current drain Less than 300 mA (at tuning)
Less than 1 mA (stand-by)
Electric polarity Negative ground
Operating temperature range –10°C to +60°C, 14°F to +140°F
Tuning accuracy Less than 1: 2.0 VSWR
(except λ/2 of antenna length and its multiples)
Number of tuned memories 45 memories
Dimensions (W × H × D) (projections not included) 190 × 105 × 40 mm; 7.5 × 4.1 × 1.6 in
Weight (approximate) 450 g, 15.8 oz (battery cells are not included)

Applicable IP Rating

Ingress Protection Standard
IP rating IP54 (Dust-protection and water resistant)

All stated specifications are subject to change without notice or obligation.

Supplied Accessories

  • Coaxial cable (2 m, 6.6 ft, BNC connectors, between AH-705 and IC-705)
  • Control cable (2 m, 6.6 ft, between AH-705 and IC-705)
  • Terminal connector, PL-259 to binding post socket adapter for a long wire antenna*
  • Mounting bracket (with a screw and washer)
  • DC plug

* PL-259 plug is supplied for Europe version, instead of Terminal connector.

Panel View

Optional Accessories

Catalogs / Brochures

Brochures Name Size
HAM Radios and Receivers (European Edition) 6.98MB
AH-705 1.43MB