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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 small FM transmitter for short distances has a stereo multiplexer and can be used over an...
This commercial circuit of 3 transistors was found in Japanese documentation from the 1960s. The...
We found this circuit on Motorola's 1993 Linear Interface ICs. Equivalent operational amplifiers can be...