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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.

500w Power Audio Circuit For Horn

500w Power Audio Circuit For Horn Part: R1 27 kΩ         C1 1 µF 63V                D1 1N759A zener 12V 0.5W R2 4.7 kΩ        C2 1nF 100V               D2 1N4738AT zener 8.2V 1W R3 5.6 kΩ        C3 100 µF 16V            D3 1N4738AT zener 8.2V 1W R4 5.6 kΩ        C4 100 nF […]

Home theater surround sound Schema diagrram

Home theater surround sound Schema diagrram using 4558 and c945 Home Theatre Audio Project – Design and Layout

32 khz crystal oscillator circuit

32 khz crystal oscillator circuit using 2n3904

Circuit Diagram CB fm 27mhz Receiver Diagram

Circuit Diagram CB fm 27mhz Receiver Diagram 27MHz FM-CB receiver built with TCA440 for listening CB transmissions with FM. The selection is made with ceramic filters. This 27 MHz receiver works with an intermediary frequency of 455 kHz.

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