I agree that the bird is an inductive pickup device but it could easily
pick up a voltage signal through capacitance.
---
Ron
Richard wrote:
>
> >> Hi Gary.
> >> That is not the case .
> >> The Bird 43 picks up current directionally. With a standing wave on
> >> the line , current is washing back and forth through the line. It
> >> still picks up signals directionally. --- Ron
> >
> >The Bird 43 element, like every other directional coupler device that
> >measures forward and reflected power at one single point in a
> >transmission line (rather than points separated by an appreciable
> >fraction of a wavelength) samples both line current and line voltage.
> > ...
> ? Mr. Raush: The Bird® slug has an Inductive pickup. How is the voltage
> on the transmission line sampled if the slug does not contact the center
> conductor of the transmission line ?
> - Thank you.
>
> - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
> www.vcnet.com/measures.
> end
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