This untuned (aperiodic) amplifier circuit was found in the August 1974 Radio Electronics magazine. The transistors are period, and the board layout is critical.
This 2-CK722 oscillator was found in a march 1961 Radio Electronics Magazine. The circuits need...
The two circuits we suggest are from the book Optoeletronics - Theory and Practice by Texas...
This interesting configuration of optical triggering using an oscillator was found in a 90s...