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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.

Audio Doorphone Intercom Circuits using 4093 and 4066

Audio Doorphone Intercom Circuits using 4093 and 4066 Audio Doorphone Intercom Circuits using 4093 and 4066

Equalizer Amplifier circuit

Equalizer Amplifier circuit With ALC using KA2220 Equalizer Amplifier circuit With ALC using KA2220

How can i get Printed Circuit Board Design Standards?.While i am designing pcb layouts?

Rudra asked: This is regarding Electronics R&D Circuits. It’s must and should to follow some “IPC” standards those are designing circuits.I want that “IPC” standards freely. Anybody having that standards feel free forward it to my email id.

The control Lights 220V circuit

The control Lights 220V circuit could be realized using transformer The control Lights 220V circuit could be realized using transformer

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