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Posts tagged 80米,

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.

home theater amplifier

home theater amplifier circuit using TL074, BD139, BD246, BD140, BD245

STR STR50103 Switching Power Supplies

Switching Power Supplies using STR STR50103

Make electronic circuit 7MHz SSB Transceiver to communicate

Make electronic circuit 7MHz SSB Transceiver to Radio Make electronic circuit 7MHz SSB Transceiver to Radio communicate

60W Power Audio Amplifier circuit using LM1875

60W Power Audio Amplifier circuit using LM1875 60W Power Audio Amplifier circuit using LM1875 The following circuit diagram is the 60 Watt power audio amplifier circuit, build based on power amp chip LM1875. The single chip of IC LM1875 is able to amplify the audio power output up to 60W. In this circuit, the two […]

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