13W Amplifier (T486E)

This 5-tube hi-fi amplifier was found in an American publication from 1947; The output is in class B and the circuit uses a source with transformer.

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Pulse Extender (CB16021E)
This interesting circuit suggested by Motorola increases the duration of a pulse produced from the...
5 and 15 V Dual Symmetric Power Supply (CB4304E)
This symmetrical power source for currents up to 1 A was found in a 1986 documentation, serving...
Current Regulator LM117 (CB14301E)
We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994....