Found in a 1964 Electronic Design, this circuit is intended to serve as a time base for cardiac monitors. Transistors support equivalents.
This astable multivibrator has an emitter coupling between the transistors. The circuit is from...
This circuit is from the 1968 ARLL documentation. The MOSFET admits equivalent and the coil...
This 1960s Japanese receiver uses 6 germanium transistors, being powered by a 6 V voltage obtained...