This circuit with germanium transistors is from 1960 and was found in Mullard's transistor application manual from 1960. The circuit can be adapted to use more modern transistors.
This circuit is from a 1965 Motorola documentation. The transistors are of the time as is the...
This circuit measures the conductivity of a saline solution, which is affected by the electrolysis effect....
March 2017 - Coilcraft SLR series inductors for currents up to 100 A can be obtained from Mouser...