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 was found in an old publicatio n from the year 1958. The circuit controls an external load by...
The focused circuit was found in the National Semiconductor's Linear Applications Handbook of...
If there is an indispensable household appliance in our kitchen these days it is the microwave...