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This variable frequency oscillator was found in an old American documentation. Transistors allow more modern equivalents and coil data are found next to the diagram for several frequency bands.
This circuit is designed to trigger a xenon lamp from a switch. The circuit was found in the May...
This circuit consists of a stereo audio compressor. We found it in Radio Electronics magazine from...
This circuit, found in a 1977 documentation, indicates when the grid voltage goes through zero....