Simple 1-tube receiver (T960E)

This 1V heater tube circuit was found on a Radio Craft from 1945. The circuit is for medium wave and can be used as a tuner.

1 W Stereo Mini Amplifier (CB8508E)
Suggested in a 90s European documentation, this amplifier is based on the TEA2025, presenting a...
Pink Noise Generator (CB5433E)
This circuit was found in a 1980s documentation. Modern general purpose transistors can be used....
Skin Temperature Monitor (CB10960E)
This circuit was found in a 1987 magazine. It measures the resistance of the skin using a...