This circuit found in a 1964 US publication reverses the signal level by providing 9 to 0 V outputs from 0 to 9 V signals. Transistors may be equivalent.
An important possibility of use for an SCR is to trigger a relay that will be connected to the...
This reinforcing stages from a 1960s documentation. No information is given about the transformer...
This digitally programmed gain amplifier was obtained from Signetics documentation from the 1980s....