We found this circuit in a 1966 US documentation. It simulates a variable capacitor that can vary capacitance from 1,000 to 1. Transistors are general purpose types.
We found this circuit in an old documentation, using an operational of the time. The circuit...
This circuit is from the time when photos were revealed in darkrooms. We found it in a 1968...
This modulator circuit for AM transmitters was found in a 1960 Sylvania transistor manual. Modern...