This manual explains how to use the Icom AH-4 Automatic Antenna Tuner.
This manual provides instructions for the Icom AH-4 HF + 50 MHz Automatic Antenna Tuner. It details the features of the device, including its wide tuning range and automatic digital control, and explains how to use the 45 frequency memories for fast tuning. Safety warnings regarding grounding and high voltage are also included.
The document covers the installation process, including removing the cover, connecting the control and coaxial cables, and soldering the PL-259 connector. It provides diagrams for mounting the unit on an antenna pole or a flat surface and instructions for waterproofing the connections using the supplied rubber vulcanizing tape.
| Frequency range | 3.5-54 MHz (with antenna >7m); 7-54 MHz (with AH-2b) |
|---|---|
| Maximum input power | 2120 W |
| Input impedance | 1500 |
| Tuning power required | 5 to 15 watts |
| Usable temperature range | -10°C to +60°C |
| VSWR | 2.0: 1 or less |
| Weight | 1.2 kg (2.65 lb) |
| Dimensions | 172(W) x 69.5(H) x 230(D) mm |
The tuning power required is between 5 and 15 watts.
Yes, but these models can only be tuned in the 3.5-30 MHz range.
The AH-4 has 45 frequency memories for fast tuning.