This circuit is temperature stabilized. Modern equivalent transistors can be used, and the power supply can actually be between 9 and 12 V. The circuit is from an old documentation.
Found in Popular Electronics from March 1957, this circuit is based on transistors from the time....
The voltage gain of this circuit found in the 1982 SGS Linear Integrated Circuits manual is 10...
This circuit, found in an English publication in 1982, has an inverted sequential effect, as the...