This circuit is from a 1965 Electronic Design. The transistors may be general purpose and the power supply must be symmetrical.
JFET This configuration, quite common in this section, was found in a 90s American documentation. The...
This circuit is from a 1968 Electronic Design. The characteristics of the output transformer are not...
This circuit is from an old documentation from 1995, but it can be easily assembled today by the...