This receiver circuit was found in documentation from 1924. The circuit uses two batteries, the high voltage one being 90 V.
The sensor is an NTC and in the connection as shown in figure (a) we have the trigger with the...
This oscillator configuration with the operational 741 was obtained in a European documentation from the...
Found in Motorola's 1965 manual, this full-wave dimmer controls a load that depends on the used...