・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.
- 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.
Ingress Protection (IP) Code
Ingress Protection (IP) ratings define the level of protection provided by enclosures to prevent the ingress of foreign objects (dust) and liquid into the electrical equipment.
International Standard IEC 60529 outlines an international classification system that describes the sealing characteristics of electrical equipment.
The classification system uses the “IP” code, or “Ingress Protection” code, to define the level of seal.
An IP number contains two numbers (i.e. IP67) in most instances which relate to the level of protection provided by an enclosure or housing.
Either number may be shown as “X” (i.e. IPX6 / IP7X) to indicate the “X” part is not tested.
Degrees of Solid Particle Protection – 1st Digit
|IP6x||No ingress of dust; complete protection against contact. (Dust tight)|
|IP5x||Protected from the amount of dust that would interfere with normal operation. (Dust protected)|
Degrees of Liquid Ingress Protection – 2nd Digit
|IPx8||Protected against continuous immersion in water.
Depth and duration specified by model.
|IPx7||Protected against temporary immersion in water for 1 m (3.3 ft) for 30 minutes|
|IPx6||Protected against water projected by powerful jets from any direction.
100 L per minute by a powerful jets (12.5 mm) for 3 minutes.
|IPx5||Protected against water projected by jets from any direction.
12.5 L per minute by a nozzle (6.3 mm) for 3 minutes.
|IPx4||Protected against water splashed against the equipment from any direction|