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