The Icom AH-4
matches your transceiver to an antenna more than 7 m/23 ft long (3.5–54 MHz).
Wide Tuning Range
The AH-4 provides reliable matching from 3.5 MHz to 54 MHz when using at least a 7 m (23 ft) antenna.
Automatic Digital Control Tuning
The built-in 8-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-4
tunes on that frequency in less than 1 second. Note that the AH-4 does not memorize a frequency which is normally tuned within 2.5 seconds. Memories are retained only when the power is on.
The AH-4’s tightly sealed plastic case allows convenient mounting virtually anywhere. The AH-4 can be mounted outdoors under your antenna.
0.3 W Radiated Power
Radiated power during tuning is less than 0.3 W, minimizing interference to other stations.
The AH-4 can be used with most of Icom HF transceivers, which covers HF through 50 MHz bands. However, the IC-706 and IC-736 can only be tuned in the 3.5–30 MHz range.
|Frequency range|| : ||3.5–54 MHz (with an antenna longer than 7 m; 23 ft)|
|Maximum input power|| : ||120 W|
|Input impedance|| : ||50 Ohm|
|Tuning power required|| : ||5 to15 watts|
|Rated voltage|| : ||13.8 V DC ±15% (current less than 1 A)|
|Usable temperature|| : ||–10°C to +60°C (+14°F to +140°F)|
|VSWR|| : ||2.0:1 or less (except antennas a one half wave or multiple of a one half wave in length)|
|Weight|| : ||approx. 1.2 kg (2.65 lb)|
|Dimensions|| : ||W172 × H69.5 × D230 mm (projections not included)|
- 2x U-bolt with bracket
- Control cable length 5 m
- Coaxial cable length 5 m
Dimensions and weight are including packaging
||L36 x B30 x H13 cm