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PCB Repair

Circuit Board Repairing

7W differential amplifier circuit

7W differential amplifier circuit using MB3731

The AM Transmitter circuits

The AM Transmitter circuits in two and a half, audio amplifier and an RF oscillator. The oscillator is built around Q1 and associated components. Tank circuit L1 and VC1 is melodious from about 500kHz to 1600KHz.

Inverter amplifier schematic LC50

Inverter amplifier schematic LC50

Reverse polarity protection circuit

Reverse polarity protection circuit using 4584 IC and Relay

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