This circuit was found in General Electric documentation from 1964. It makes use of a PUT, called the PNPN planar key at the time. The circuit has two supply voltages.
This high quality audio preamplifier uses three bipolar transistor and is powered from 24 V...
This circuit for analog video signals was found in the August 1970 issue of Radio Electronics...
This oscillator can generate 2 to 10 MHz signals and was found in an American 1980s documentation. The...