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 intercom uses transistors from the 60s. It was found in a Japanese publication at the time....
A The adjustable Q-factor rejector filter in the figure is based on two LM110. These integrated...
Found in Electronics Now this circuit can generate signals up to a few tens of Megahertz. The circuit...