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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.

Latching relay driver circuit projects

Latching relay driver circuit projects using 4093B, 4017B, 2N7000, 78L05

Automatically Digitouch off on

Automatically Switches off on

I have a LCD32HDMI TV of whrfedala, not working?

Mahendra R asked: I Have a LCD32HDMI, it’s power supply is working fine but when i connect with main board 12v goes down to 1.2 v or low. what is the problem in main board.or you have the circuit diagram of this board 17MB15E-3 board

TV signal amplifier circuit?

Nish asked: Need a circuit diagram to amplify both VHF and UHF signals received from the outdoor VHF/UHF antenna. This circuit should have a high gain output.

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