This power supply circuit was obtained from the February 1993 Radio Electronics magazine. The integrated circuit and power transistors must be provided with heatsinks.
The circuit shown uses an operational transconductance amplifier such as the LM3900. Transistors...
In the presented receiver, from a 1964 documentation, a transistor is used as a detector,...
Found in Popular Electronics from the 90s, this circuit uses a 2N2646 and a general-purpose transistor...