Reg Edwards wrote:
Ian wrote -
I don't believe transmitter output impedance is
fundamentally
un-knowable... only that it is extremely difficult to
measure in
practice. All the measurement techniques I've heard
of seem to be
subject to either theoretical weaknesses or problems
of practical
accuracy.

====================================

You lot will drive me to despair.

What's the problem?

You have just designed the PA.

You are familiar with its very simple internal
circuitry.

You have its component values, including the active
ones.

Hasn't it yet occurred to you engineering Ph.D's all
you have to do is calculate it.

Sewer kids in Rio have better arithmetical aptitudes.

Sorry, I don't have an engineering PhD... but if *you* think it's so
simple, then lay your money down: show us.


--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'
http://www.ifwtech.co.uk/g3sek