This circuit can generate signals in the VHF range and can be used as the basis for small transmitters. The frequency depends on the coil, which can have 2 to 8 turns for the range of 50 to 200 MHz.
This circuit was found in a 90's EDN. The circuit has a well-known configuration. The voltage...
The circuit is from the MC1539 manual, an operational one close to the 741. The transistor admits...
The figure shows how to use the 4 transistors of the IC 4007 as a current drain. The circuit was...