We found this precision circuit in a manual from the 80's. The operational amplifier is of a common type at the time, and equivalents can be tested. Transistors are general purpose types.
This is a traditional complementary configuration that provides good audio power with excellent...
This biestable vox circuit was found in an old documentation. The circuit makes use of components of...
This circuit is intended for use with common oscilloscopes having been found in documentation on...