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Posts tagged 驻波比,

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.

Touch switch Circuit using 555

Touch switch Circuit using 555

amplifier electronic circuit

amplifier electronic circuit Equalizer Amplifier circuit With ALC using KA2220 amplifier electronic circuit amplifier electronic circuit

Simple Vcsel Laser Tester circuit

Simple Vcsel Laser Tester circuit using 74HC14, 2N2222, 7805

Headphones Circuit

Headphones Circuit using SMI1458 1458 Headphones Circuit using SMI1458, 1458

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