This circuit uses a resonant reed relay to recognize the frequency of an input signal. Adaptations can be made to obtain functioning as a shield. The circuit is from 1965 documentation.
This project was found in a 1982 documentation. Super-regenerative receivers can combine great...
We found this circuit in a 1977 technical documentation. The circuit can use a TIP31 for Q1 and a...
This high frequency modulator was found in Motorola's 1990 Linear Databook. The current depends on the...