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Archives for RF amplifier
Booster Antenna
Booster Antenna Circuit Antennas that are much shorter than 1/4 wavelength present a very small and highly relative impedance that is dependent on the received frequency. It is difficult to match impedances over a decade of frequency coverage. Instead, input stage Q1 is an FET source-follower. A high-impedance input successfully bridges antenna characteristics at any […]
Lamp scr schematic
Lamp scr Lamp circuit using BS250, BS170
Audio circuit
Audio circuit 70W using MOS 2SK135 2SJ50 Audio circuit 70W using MOS 2SK135 2SJ50
Touch switch Circuit using 555
Touch switch Circuit using 555
STR10006 CCTV power supply
STR10006 CCTV power supply
