This circuit operates with frequencies from 0.5 to 400 MHz. We find it in a 90’s NASA documentation. The transistors are from that time.
This circuit is from a 1967 General Electric SCR manual. The capacitors are polyester and the...
This oscillator for frequencies up to a few tens of kilohertz was found in a 1970s documentation. The...
This varicap-less modulator circuit was found in an Electronic Design from the 90's. The circuit...