We found this tube receiver in a 1950s Japanese publication. The circuit uses 5 tubes and has an RF amplifier stage for greater sensitivity. The power supply is not shown on the circuit.
This circuit found in a 1974 English magazine was originally designed to automatically trigger a slide...
Found in old documentation, this circuit uses a double gate MOSFET. The operating frequencies...
This circuit is from Motorola's Linear Interface ICs from 1993. The MC1723 is the equivalent of...