Gain 10 Voltage Amplifier (T456E)

This 4-stage circuit has a voltage gain of 10 and negative feedback. The circuit was found in an old MIT publication.

3-Transistor Radio (CB18847E)
This is a commercial radio circuit from the 1960s. The circuit was found in a Japanese publication from...
Temperature control (CB21365E)
This circuit was found in an old GE SCR manual. The SCR must be in accordance with the relay and...
100 Hz Oscillator (CB20350E)
The original purpose of this circuit, which we find in old American documentation, is to modulate an...