This 7-tube circuit was obtained from an American publication in 1947. The circuit has a push-pull output with a source using a transformer.
Found in an American amateur radio documentation by the name of “antennascope” this circuit is...
This circuit was obtained from a 2005 Linear Technology manual. It is based on company components...
This circuit is from a 1968 publication. Here we have several types of resistive sensors with...