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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.

Electronic Circuit ding-dong Sound for any Alarm

Electronic Circuit ding-dong Sound for any Alarm Basically the circuit alternates between two frequencies which are adjustable. This produces the “ding-dong” sound.

Electrical Engineering – Diagram Equipments

Basic Electrical Engineering Diagram Equipments

70W Audio Amplifier Circuit using STK086

70W Audio Amplifier Circuit using STK086

ne5532 amplifier

ne5532 amplifier op amp amplifiers using ne5532 amplifier ne5532 amplifier ne5532 amplifier circuit

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