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Posts tagged 필터

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 Crystal tester circuit

Simple Crystal tester circuit

Best Audio Active high pass filter

Best Audio Active high pass filter circuit using LM741 Best Audio Active high pass filter circuit using LM741

Low Active crossover frequency using TL072

low Active crossover frequency Active crossover using TL072

LM555 Electronics Schematic Diagram Bipolar LED Driver part 13

LM555 Electronics Schematic Diagram Bipolar LED Driver part 13

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