Key facts
- Brand
- ICOM
- Model
- AH-740
- Category
- Vehicle maintenance
- Industry
- Automotive
- Documents
- 2
- Languages
- EN
- Last added
- 2023-10-15
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Icom AH-740 HF Automatic Tuning Antenna Instruction Manual
The Icom AH-740 is an HF automatic tuning antenna designed primarily for use with Icom HF transceivers. It features a compact and lightweight design with fast tuning speeds, covering a frequency range of 2.5 to 30 MHz when using the supplied whip, and 2.2 to 30 MHz with the optional NVIS kit. The antenna requires a 13.8 V DC power supply and has a maximum input power of 125 W (PEP).
Read onlineIcom AH-740 specifications
| Frequency coverage (with whip) | 2.5-30 MHz |
|---|---|
| Frequency coverage (with NVIS kit) | 2.2-30 MHz |
| Power supply requirement | 13.8 V DC |
| Current drain | Maximum 0.6 A |
| Operating temperature range | -40°C to +70°C |
| Maximum Input power | 125 W (PEP) |
| Automatic tuning time (new frequency) | Approximately 2 to 3 seconds |
| Automatic tuning accuracy | SWR 1.5:1 |
| Dimensions | 238(H) x 145(W) x 160(D) mm |
| Weight | approximately 3.5 kg |
Source: Icom AH-740 HF Automatic Tuning Antenna Instruction Manual
All Icom AH-740 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the frequency range of the AH-740 with the supplied whip?
The frequency coverage is 2.5-30 MHz when using the supplied whip.
From: Icom AH-740 HF Automatic Tuning Antenna Instruction Manual
What is the frequency range with the optional NVIS kit?
With the optional NVIS kit, the antenna covers the 2.2 to 30 MHz range.
From: Icom AH-740 HF Automatic Tuning Antenna Instruction Manual
What is the operating temperature range for the AH-740?
The antenna can operate in temperatures ranging from -40°C to +70°C (-40°F to +158°F).
From: Icom AH-740 HF Automatic Tuning Antenna Instruction Manual
How fast does the automatic tuning take for a new frequency?
It takes approximately 2 to 3 seconds to tune to a new frequency.
From: Icom AH-740 HF Automatic Tuning Antenna Instruction Manual