The transistor used in this circuit is uncommon today. AC124 or equivalent such as AC188K and 2N2431 can be used. The circuit is from the 80's and makes use of transformers.
We found this circuit in an old publication. The circuit can be implemented with modern equivalent...
The components of this circuit are from the time of its publication in the 1980s. Modern...
In a voltage follower the gain is unitary. Input impedance is too high and output impedance too low....