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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 an old English publication and in other parts of this website in different versions, this...
The range of this transceiver found in an old national publication is of the order of 1 km. The...
This small 2-transistor amplifier was found in the Radio Electronics magazine of May 1959. The...