Fred:

With a toroid core, using the manufacturers data on uh/mh per number of
turns, al factor and such, should allow you to compute the inductance and
come to a value of the impedance that inductance poses at the operating
freq(s) in question...

Major problem I see is a resonance(s) occurring with feedline length and
the inductance chosen, but even that could be designed out with a pencil
and paper... the physical testing you are inquiring about has my interest
also...

John

On Mon, 22 Aug 2005 19:08:43 -0400, Fred W4JLE wrote:

How can I test how well a choke balun is performing? I know how to test a
transformer balun, but am cluless as how I can compare several different
choke balun approaches.