This circuit allows you to simulate an analog telephone line for the repair and testing of devices. The circuit is from 1994 and all the components used are common.
We found this circuit in a 1972 documentation. The transistor, in fact, is a unijunction that can...
We found this circuit in Radio Electronics magazine from June 1960. The four-transistor circuit is...
This circuit was found in an old documentation. It converts DC voltages and its maximum current...