This time base circuit for the oscilloscope was obtained from an Electronics Now from the 90s. The circuit is intended to control the cathode ray tube of old oscilloscopes.
We found this circuit in a publication for radio amateurs in 1974. The bipolar transistors can be...
Found in a 1980s American documentation, this circuit has a current consumption of only 1 mA. The...
This adjustable power supply was found in Ferranti's transistor manual from 1974. Power...