The setting of this power supply is only 0.1%. We found it in a 1969 US documentation. Transistors may be current equivalents. Note the use of symmetrical power supply.
August 2016 - It can be obtained from Mouser Electronics new operational amplifiers with extremely low...
The output voltage of this circuit is approximately four times the supply voltage. The circuit is from...
The galena XTAL is replaced by a germanium diode in this Project. Diodes such as the 1N60 or 1N34...