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Posts tagged QRP、

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.

50 Watt Power Amplifier circuit diagram Using 2N3055

The amplifier uses a pair of power transistors that are MJ2955 and 2N3055 to amplify the input signal. You must use a heatsink on those transistors.

High Speed PCB Design – Digital Circuits And Design

High Speed PCB Design

Audio amplifier circuit diagram using ic TA7222AP

Audio amplifier circuit diagram using  ic TA7222AP 2822    

Electret microphone amplifier circuit Diagram

Electret microphone amplifier circuit Diagram using LF353, XR567, 16F84, 7805

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