This is a low-gain amplifier to operate as a booster. We found it in an American documentation from 1947. The circuit uses a coupling transformer at the input.
We found this circuit in a French technical documentation from 1982. The circuit can be...
This circuit, suitable for record players with magnetic phonocaptors (pickups), has RIAA...
We found this circuit in the May 1989 issue of Radio Electronics magazine. The circuit uses...