This receiver was found in a 1924 book by Gernsback. The circuit uses three tubes and is powered by 3 batteries of different voltages, common at the time.
This circuit was found in documentation from the 70s. The transistors are from that time, but the...
Epcos TDK TB2569 Film Capacitor EPCOS / TDK offers through Mouser Electronics are line of film...
A very interesting integrated circuit for step-down converter designs (voltage reducers) with an...