November 2020
Soldered board of ATU (Automatic Antenna Tuner) developed by N7DDC. (firm. version 3.2)
- Power supply range: 10 - 15 VDC
- Max current : 450mA
- Max working power: 100 watts
- Max measured power: 150 watts
- Minimum power for tuning start: 1 watt
- Recommended maximum power while tuning not above 30 watts. (after tuning you can set 100 watts and work on this power)
- Minimum measured power: 0.1 watt
- Step for measurement on powers under 10 watts: 0.1 watt
- Step for measurement on powers above 10 watts : 1 watt
- Power measurement accuracy : 10%
- Maximum inductance set: 8.5 uH
- Minimal step for setting inductance: 0.1 uH
- Maximum installed capacity: 1870 pF
- Minimal step for setting capacity: 10 pF
- 100 Watts tuner, 7x7 (7 capacitors x 7 coils) based on PIC 16F1938.
originally setup 2019
