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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.
Found in 1980s documentation, this oscillator uses an integrated TTL Schottly. The supply must be...
Two 4011 NAND gates are used in this crystal-controlled oscillator. The frequency can reach a few...
This circuit was found in a 1970 Philips documentation. The components are from the time, and...