See below...

"Reg Edwards" wrote in message
...

"Old Ed" asked -

But I am curious: What program inputs are required to
calculate losses for tuners and baluns? Schematics? ;-)
Coil Q? Wire type and gauge? Loss factors for ferrites?
And how would one KNOW these parameters for real-world
examples, say a Palstar AT-1500DT versus an Ameritron
ATR-30?
=========================================

Ed,

I've just spent half an hour thinking about how to answer your
question without having to write books on the various subjects.

What sort of gadgets are a Palstar AT-1500AT and an Ameritron
ATR-30? Who are Palstar and Ameritron anyway?

Manufacturers might know. Have you tried Google?
----
Reg.

Reg,

Perhaps I assumed too much about amateur radio being a global
market.

Palstar is the brand name of a popular line of high-end antenna
tuners (aka transmatches) that are made in the U.S.A. Ameritron
is best known for their broad line of H.F. power amplifiers, but
they also make a couple of antenna tuners; the ATR-30 is one.
(They are now a division of MFJ; and it would be amazing if
you haven't heard of MFJ.)

Feel free to substitute antenna tuner models that are more familiar
to you into my question, if that will make it easier to understand.
I'll also try restating the question:

What parameters does a user input into your newly-posted program
in order to estimate tuner and/or balun losses?

Predicting such losses seems inherently difficult to me; and
even if the program could handle all the necessary parameters,
I have a hard time seeing how one could obtain the necessary
values to characterize typical commercial (or homebrew) tuners
and/or baluns.

Re Google, doing a search on "Palstar" leads one straight to
their products, including the AT-1500 series:
http://www.palstar.com/at1500cv.php
Similarly, doing a Google search on Ameritron leads one straight
to their products, including the ATR-30:
http://www.ameritron.com/products.php?prodid=ATR-30

But I am sure that neither manufacturer has posted parameter
values to use in your program--despite your well-deserved
notoriety in this NG. So I am quite sure that Googling for
those would be unproductive.

Ed