Found in 1969 Ferranti documentation, this small font is characterized by its low ripple. Transistors can be common for general use, due to the low operating current.
This experimental amplifier was found in the 1960 Mullard transistor reference manual. The...
This circuit from Motorola is from 1968, appearing elsewhere on this site. The transistors admit...
This circuit triggers the LED when the monitored battery voltage drops below 9 V for 12 V...