This circuit with current up to 100 mA according to the transformer was found in the Radio Electronics magazine of October 1991. The regulation is done directly by the zeners.
We found this amplifier circuit for inductive audio pickups in a documentation from the 70s. The...
The presented circuit uses two old germanium transistors. We found this configuration in a...
This high stability circuit was found in old documentation. The operational can be a modern...