Richard Clark wrote:
On Tue, 28 Mar 2006 12:05:01 -0500, John Popelish
wrote:


But a choke with two wires wound through it is two inductors that also
have mutual inductance between them, and if that doesn't define a
transformer, what does?


Hi John,

Then you think of it as an air core transformer with series driven,
bucking sections. Now, what kind of practical transformer does that
define? 1:1 does not automatically spring to mind unless it is
isolating one circuit from the other. However, it is not the
transformer that does that, it is the choking ferrite and only in the
service of snubbing common mode currents.

With this in mind, do we add a characteristic of loss to the
definition? A lossy air core transformer with series driven, bucking
sections.

Air core? It is a ferrite core transformer with two one turn
windings. One winding is the shield passing through the holes in the
cores and the other winding is the center conductor passing through
the windings. (view with fixed width font, like Courier)

|half of dipole
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Center cond.-----MMMM-+