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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.

Cmos Integrated Circuits

AD9852AST Cmos Integrated Circuits

Audio Activated Switch circuit

Audio Activated Switch circuit using LMC7215, ZXM61N02F

Audio amplifier circuits

Audio amplifier circuits using LA4597

Making best mic preamp

Making best mic preamp 3 TR using C644, C828 Making Preamp Mic 3 TR using C644, C828

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