Bath control (CB21373E)

This hydromassage circuit was found in a 1967 General Electric publication. The SCR is according to the power of the heating element.

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Composite amplifier (CB20632E)
This circuit combines a low-offset and a high-speed operational amplifier. The circuit was found in...
Touch Switch (CB26207E)
We found this circuit in the 1983 Radio Electronics Special projects magazine. The components are...
Modulated Oscillator (CB22067E)
This power oscillator uses an LM380 amplifier. We found it in old English documentation. The C3...