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Circuit diagram 75 Meter QRP SSB Transceiver

The 75 Meter QRP SSB Transceiver Theory of Operation 6-30-03 In general, the transceiver switches the 4-element 1500 ohm xtal BPF ends between the inputs and outputs of the two SA602s to reverse the signal flow for R/T operation. Since no IF amplifier is used in the design, 20 dB of additional receiver gain is […]

Class D Audio Amplifier Circuit

Class D Audio Amplifier Circuit Class D Audio Amplifier Circuit using stk4372 Class D Audio Amplifier Circuit Class D Audio Amplifier Circuit

Circuit diagram remote control

TV remote control Circuit diagram using SL490 This is a 32 channel infrared remote controller circuit fundamentally includes key pad, decoder, transducer stage, an output and a battery. Every key pad button generates 5 bit binary code and IC1 sends this code to the IR leds through D1 and D2 diodes.  Code is shaped from […]

low pass audio filter circuit

low pass audio filter circuit low pass audio filter circuit low pass audio filter circuit

Introduction to PCB Manufacture for Hobby

Introduction to PCB Manufacture for Hobby

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