Radio with amplifier (CB20486E)

We found this circuit in a publication of 1991. The audio amplifier is an operational that admits equivalent.

High Voltage Power Supply (CB1228E)
This source was obtained from a former publication for valves but also serves for powering common...
Darlington Conventional 6N13 (CB1557E)
In the figure we have the configuration of the circuit as a conventional Darlington. In this...
High Impedance Precision Rectifier (CB5097E)
This precision rectifier circuit is suitable for applications in an AC / DC converter. We find it...