VPA – Page 2

The Circuit

All the work I’ve done with this VPA is based on the PA0DRT Mini Whip design and I claim no originality for the circuit or, indeed, the format of the system.  It looks like a two-stage amplifier with its input connected to a very small antenna element and its output to a receiver.  For convenience the DC supply to the active components may be fed through the feedline (Typically coax) or by a separate LT circuit.

The circuit with which I began is shown here

Image: Circuit diagram of voltage probe antenna


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