The configuration shown allows to obtain a high voltage gain for FETs. FETs can be BF245 or MPF102. The circuit is from the 1977 National Semiconductor FET Databook.
This circuit appears in similar versions elsewhere on this site. The transformer is 110 V or 220 V...
This is one of the channels of an amplifier suggested by Westinghouse in 1970s documentation. The circuit...
The XR2206 is not a common component today, but if you have one you can build this function...