Linear Amplitude Modulator (CB21087E)

Found in an Analog Devices documentation from the 90s, this circuit uses a component of the time, not common nowadays.

Limiter with zener diode (CB7054E)
This circuit was found in an old Electronic Design. It makes use of sidacs and operational not very...
Emergency Light (CB924E)
Although it was found in a British magazine 1976, this circuit can be easily upgraded with the...
0 to 13.8 V x 3A power supply (CB16878E)
This circuit that uses only transistors that are still common was found in a 1995 documentation. The TIP41...