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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.

Simple Audio Circuit

Simple Audio Circuit using LM386

30W Audio Amplifier Circuit

30W Audio Amplifier Circuit using TDA1514A

Stereo Audio Amplifiers

20W – 5A stereo audio amplifiers using IC M5152L and BA53-BA5406 20W – 5A Audio Amplifier using IC M5152L and BA53-BA5406

Create an Electronic GPS to Monitor Earthquakes

Create an Electronic GPS to Monitor Earthquakes

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