No information is given on the transformer in this circuit that we found in an American 1967 documentation. The power transistors are of the time and mounted on a plug-in module.
We found this circuit in a 70s EDN. The circuit makes use of operational of the time. | Clique na...
This source was published in the year 2000 and is indicated for period devices with currents of 3...
This 50's setup has a balance control. The transistors are germanium types of the time, and the...