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Schematic diagram for a broadband QRP SWR metering circuit and SSB TRANSCEIVER 80M / 40M boster filter IF Radio

A schematic diagram for a broadband QRP SWR metering circuit for use in a QRP antenna tuner. One could simply hold a momentary DPDT switch down and watch the LED while tuning the capacitors of the antenna tuner for minimum or zero light.

Lcd TV Power Supply Circuit Diagram

Lcd TV Power Supply Circuit Diagram

aims power inverters

3000W 12v – 230v aims power inverters circuit diagram 3000W 12v – 230v aims power inverters circuit diagram circuit diagram

Higher brightness variable circuit

Higher brightness variable circuit using LM334Z, BC558

Mini Guitar Amp circuit using TDA7052

Mini Guitar Amp circuit using TDA7052 R1    22K C1    10µF  25V C2    100nF  63V C3    220µF  25V IC1   TDA7052 SPKR    8 Ohm  Loudspeaker B1            9V, 3V  Battery

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