"chuck" wrote:

could some one explain what An impedance matching transformer is and how
i
could make one?

A random wire antenna fed at one end will present a high impedance (~2000
ohms). Most coaxial cables have a characteristic impedance of 50 or 75 ohms.
To match the coax to the antenna, a matching transformer is used.

See.
http://www.hard-core-dx.com/nordicdx...eed/index.html


Or do a Google search on: "9:1 balun"

Art Harris N2AH