This circuit was found in a 1969 Mullard publication. The transistor may be the modern equivalent of BC548. Observe the relatively high supply voltage.
The integrated circuit used in this amplifier is not very common today. We found this circuit in a...
This circuit uses NOR ports to generate signals up to 10 MHz, depending on the crystal. The supply...
The transistors in this circuit from an English publication in 1980 may be the BC548. Operational...