Semi-automatic HF Antenna Tuner Controlled by Arduino

ATU can tune a wire of virtually any length on all HF bands.

The coil bank, top view:
The coil bank, bottom view:
The capacitor bank, top view:
The capacitor bank, bottom view:
 
Video showing use of the ATU

ATU investigated by a thermo camera

Schematics:
      
Controlling board with Arduino
      
Coils bank
      
Capacitors bank
      
Band switching chain
      
Switching between C and L to tune (board on the front panel)

Software:
      
Arduino Nano controlling Software

 

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