This bench circuit was found in the February 1998 issue of Electronics Now magazine. It can be used to obtain a very wide range of capacitances for testing.
We found this circuit in an article of our own from 1992. The circuit is based on an integrated circuit...
This preamp version uses BC109 transistors that are older versions of the current BC549 in plastic...
The transistors of this circuit may be the BC548 or BC549 and its power supply can be performed...