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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.

TV remote control blocker

TV remote control blocker using 555 ON electronic circuits diagrams

Audio Isolation Transformers

Audio Isolation Transformers 60W Audio power amplifier circuit using transformer 60W Audio power amplifier circuit using transformer

Circuit Diagram Converter trigger signal causes the 555 to discharge the capacitor for synchronization

LM1881 is used to do all the grunt work of separating the sync signals from the composite video. The chip provides the vertical sync on pin 3 for the vertical oscillator, and composite sync on pin 1 for the horizontal oscillator. The intensity signal comes from the composite video signal itself, but is negative. I […]

Satellite TV Receivers

Satellite TV Receivers Circuit 2.7GHz Frequency Synthesizer For Satellite TV Using TD7626F and TD7626FN Satellite TV circuit Using TD7626F and TD7626FN

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