ATU-1200 PRO 2 BOARD
1200W Automatic L-Network Antenna Tuner/coupler  with Auto-Switching 4:1 UNUN
 
The ATU-1200 PRO BOARD is a high-power automatic antenna tuner designed for serious HF operators who require reliability, precision, and wide matching capability. Built around a robust L-network topology, it delivers efficient impedance matching from 1.5 to 30 MHz with outstanding tuning resolution and memory management.
 
Now available in a new upgraded version featuring an automatic 4:1 UNUN, allowing seamless matching of high-impedance antennas such as end-fed wires and long wires without manual intervention.
 
Key Features
Maximum Power Handling:
1200W PEP
500W Digital modes (FT8 / RTTY / FM)
Frequency Range:
1.5 – 30 MHz (HF coverage)
Input Impedance:
50 Ohm
Tuning Network:
High-efficiency L-Network design
Automatic 4:1 UNUN (NEW):
Built-in and automatically switchable
Expands matching range for high-impedance antennas
Ideal for end-fed, long-wire, and non-resonant antennas
25 Memory Channels:
Stores successful tuning solutions for instant band recall
AUTO Mode: Fully automatic tuning (start tuning when antenna swr is >1.8)
MANUAL Mode: Tune start by user command.
 
Precision Tuning Performance
Maximum Installed Inductance: 25.6 µH
Minimum Inductance Step: 0.1 µH
Maximum Installed Capacitance: 1905 pF
Minimum Capacitance Step: 15 pF
Fine tuning resolution ensures optimal SWR and maximum power transfer.
 
Electrical Specifications
Tuning Power Required: 10 – 40 Watts
Power Supply: 12 – 14 V DC
Maximum Current Consumption: 400 mA
 
Designed For
High-power HF stations
Linear amplifier systems up to 1200W PEP
Digital mode operators
End-fed and multiband wire antennas
Portable or fixed installations requiring reliable automatic matching
 
Why Choose the ATU-1200 PRO 2 ?
✔ Wide matching range
✔ High-power capable design
✔ Fast automatic tuning
✔ Memory recall for instant band changes
✔ Auto-switching 4:1 UNUN for extended impedance coverage
✔ Designed for feedpoint installation, the ATU operates as an automatic antenna coupler for end-fed and long-wire antennas, improving matching efficiency and reducing feedline losses.
 
The ATU-1200 PRO BOARD delivers professional-grade performance, flexibility, and reliability for demanding amateur radio applications.
 
The ATU can be controlled using two momentary push-ON-buttons (TUNE and MODE) connected via cable , perfect for outdoor setups with the unit installed in a waterproof enclosure at the antenna feedpoint.
 
For indoor operation, a TFT display controller is also available:
CLICK HERE
 
Board size (with UNUN) : 330x230x53mm
 
Contact us for more information.
Thank you