This precision full-wave rectifier used in instrumentation was found in a technical documentation from the 1980s. Diodes are general-purpose types.
With the used coils and the power transistor this circuit amplifies the 5 W of a 11-meter...
The presented circuit generates a signal in the form of a ladder that can be useful for surveying the...
This circuit is from a publication from the 70s. The tunnel diode is the critical component, and...