Only for reference this is a circuito f a commercial receiver of the year 1958. The circuit uses coils and transformers hadr to find in our days. The circuit is destinated to receive MW stations.
This source is indicated for the supply of power amplifiers. The circuit is from 1999...
Found on Popular Electronics in the 1980s, this circuit detects a change in air pressure using a...
Found in a Popular Electronics from the 90's, this circuit is used to indicate the operation of...