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Posts tagged ट्रांसीवर

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.

Alarm sensor circuit

Simple Alarm sensor circuit diagram using BC557

Amplifier system

Amplifier system for audio players using BA3870 Amplifier system for audio players using BA3870

The circuit Tv transmitter very simple

The circuit is very simple, it just has three transistors, but the transistor types have been changed for VHF/UHF transistors. You can use 2N2369, BSX19 or BSX20, or any small signal transistor with an “ft” of typically 400MHz or more. The transistor DC biasing is a little more tolerant to varying transistor types than the […]

Home burglar alarm systems

Home burglar alarm systems using 555 Home burglar alarm systems using 555

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