Showing posts with label Automatic Antenna Tuner 7x7 ATU-100 mini by N7DDC. Show all posts
Showing posts with label Automatic Antenna Tuner 7x7 ATU-100 mini by N7DDC. Show all posts

Automatic Antenna Tuner 7x7 ATU-100 mini by N7DDC

Automatic antenna tuner for HF transceiver (7 coils and 7 capacitors)
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