Found in American documentation from the 90s, this circuit uses components that are still common today. The 15 V power supply must be symmetrical.
This analog instrument circuit was found in a 1990s William Sheets. The components are common and...
This circuit also makes use of a field effect transistor (JFET) which can be the BF245 and has an...
This transmitter was obtained in a 1953 publication. The original transistor was made of...