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.
Reversing the switching action, with the output going high when the input is low, can be done by...
Frequencies up to 5 MHz can be poroduced by this circuit. The output is a square wave signal. The...
This circuit was found in a 1968 General Electric documentation. It has an input impedance of 2 M ohms...