3 V buffer (CB7142E)

This 3 V rail to rail buffer was found in a National Semiconductor documentation. The gain is unit.

5 MHz TTL Oscillator (CB15642E)
The oscillator shown generates a rectangular output signal at a frequency of 5 MHz, determined by the...
Radio Booster (CB21734E)
Found in a Popular Electronics - January/February 1969 this circuit was intended to increase the...
Battery charger (CB9127E)
Found in a radio amateur magazine of the 1980s, this circuit uses components that can still be...