# ATU-100 Automatic Antenna Tuner (Factory Original)

The **ATU-100 Automatic Antenna Tuner** is a compact **microcontroller-based external antenna matching unit** designed for efficient impedance matching across the **HF and 6m amateur bands**. Based on the open-source **N7DDC auto-tuner architecture**, the ATU-100 utilizes a relay-switched LC network to automatically tune non-resonant antennas such as end-fed wires, mobile whips, verticals, and random-length dipoles—without requiring manual tuning adjustments.

Supporting operation across **1.8 MHz – 50 MHz**, the ATU-100 can automatically achieve antenna impedance matching to improve transmitter efficiency and reduce reflected power during portable, mobile, or compact base HF deployments.

With support for transmit power up to **100W continuous**, the tuner is suitable for:

-   Portable HF Operation (POTA / SOTA)
    
-   Mobile HF Installations
    
-   Multi-Band Wire Antennas
    
-   Non-Resonant Vertical Systems
    
-   Compact HF Base Stations
    

Automatic tuning is initiated by applying RF power—allowing the tuner to match antenna impedance in real-time during transmission.

## Details

- **Price:** 7500.0 INR
- **Vendor:** Hamgeek
- **Type:** Antenna System
- **Tags:** antenna-system, antenna-tuners, automatic-tuners, hamgeek

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 7500.00 INR | In stock |

## Images

- ATU-100 Automatic Antenna Tuner (Factory Original) - RFCharge
- ATU-100 Automatic Antenna Tuner (Factory Original) - RFCharge
- ATU-100 Automatic Antenna Tuner (Factory Original) - RFCharge
- ATU-100 Automatic Antenna Tuner (Factory Original) - RFCharge

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> Source: [RFCharge](https://rfcharge.com/products/atu-100-automatic-antenna-tuner)
> Updated: 2026-05-28