This circuit is from an Electronics World of 1968. The transistors are of the time and the power is supplied with a voltage of 40 V. The circuit is high fidelity.
This circuit makes use of an unusual Analog Devices component today. The circuit is from a 90's...
A flash of light on one sensor or the touch of your fingers on the other type of sensor will turn...
This receiver for the mid-wave band was found in a documentation from the 60's. The transistors are made...