This very complex circuit in terms of the number of transistors was found in Radio Electronics from March 1966. The circuit is for low impedance headphones. The transistors are from the time.
This circuit was found in documentation from 1977. It consists of a bridge of capacitances using a 50...
We found this circuit in a Gernsback documentation from 1960. The circuit is intended for...
The frequency of this traditional crystal oscillator (XTAL) depends only on the used crystal,...