This circuit was obtained in an old European publication on FETs. The FET admits equivalent and the feed must have good filtration. Signal input cables and output cables must be shielded.
We found this circuit in a publication of 1990. With the changes it can be mounted easily today....
This circuit was obtained from an Electronic Design from 1964. Transistors admit modern...
Bourns 15KPA SD Q TVS Diodes Available from Mouser Electronics, Bourns TVS 15PA-SD-Q diodes can...