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.

You are bordering on stretching the definition of power transformer
over the application of a BalUn. This is not always useful. So, what
does it transform? A balanced circuit to an unbalanced circuit (or
versa vice).

73's
Richard Clark, KB7QHC