The Fuchs Antenna tuner with a resonant circuit as a coupler. The Fuch Antenna Tuner is providing a high-efficiency compare to a 49:1 transformer using ferrite . The Fuchs tuner is a resonating L/C circuit to step-up the impedance from 50 Ohm to the required 3k. The ATU is able to perform automatic tuning with the addition of a tiny Aduino Nano and a SWR bridge.
A review from a common ham radio operator, using the Yaesu FTdx101D series transceiver
Cheap and easy to build digital modes USB interface for Ham Radio. The DuinoVOX Arduino powered digital modes USB interface for ham radio.
Construction of a QRP 23cm HB9CV antenna 1296 MHz
A project for a six meters Yagi beam antenna, built mainly for portable operations. This is a 4 element Yagi beam with a 4 meters boom.
English operating manual of the Yaesu FT-818 HF VHF UHF portable transceiver
A list of HF VHF UHF Beacon list from New Zealand. All beacons from 20m to 3cm