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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.
July 2017 - Mouser Electronics announced the availability of the new NXP MRFX1K80 RF LDMOS...
This micro-transmitter for the FM band was found in documentation from the 90s. The circuit is...
This mixer was found in Silicon Chip documentation from the 90's. The circuit uses integrated...