This circuit was found in a 1993 Electronics Hobbyst Handbook. The circuit operates in the FM range. The coil has 4 turns of 24 or 26 wire in a coreless form 0.5 cm diameter.
This circuit trips when the input voltage exceeds 13.8 V, which is an important value in the case...
We found this circuit in a 1964 Electronic Design. Transistors can be modern general-purpose...
This 5.1 MHz circuit was found in a 1980s documentation. The frequency is given by the crystal and...