This circuit provides a reference voltage of 2.5 V adjusted in the trimpot. The transistor can be the BC558 (in the drawing it came out as NPN). The control is done by a rectangular input signal.
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...