On Mon, 19 Dec 2005 13:46:59 -0600, "RB"
wrote:

Anyone know of any calculators which enable a user to get an approximation
of the Z range of an antenna tuner by feeding in the variable values ?


You might have a look at RevLoad written by Jim Tonne, WB6BLD:

http://www.tonnesoftware.com/ (Main Site)

http://www.tonnesoftware.com/revload.html (RevLoad download)

RevLoad takes the settings of the tuner components
the system (tuner) impedance (usually 50 ohms) and
the operating frequency to calculate the load impedance
being matched. It covers all tuner configurations,
T-net, pi-net, L-net. And, best of all, it's FREE.

Jim, K7JEB