Up to 1 Hour timer (CB21424E)

This circuit was found in a 1960s General Electric unijunction transistor manual. The circuit can use any unijunction and the SCR is load sensitive.

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Shunt Regulator LM10 (CB14314E)
The presented circuit uses a component not very common in National Semiconductor. The circuit is...
Telegraphy Practice Oscillator (CB4200E)
This is one of many Morse code audio oscillators that can be found in this section. The circuit...
Compressor (CB20001E)
This circuit is from an American documentation from 1975. The circuit uses components of the time...