Jon Ogden wrote:
>Nope, not picking on me! It's a good discussion!
>
>First of all, I do agree with your statement. In reality your right, we
>match the tube for our desired power output. But is "desired" power
>output really the most efficient or is it the maximum available power
>output?
>
Not necessarily either of the above. For example we often load more
heavily than the position for maximum power output/efficiency in order
to improve the IMD performance. And there isn't even a single load
impedance for "improved IMD" - at any drive level, the levels of the
various IMD products will go up *or down* depending on the loading.
So there isn't any single load impedance that can truly be described as
"optimum", because the needs and priorities may change according to the
application.
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.demon.co.uk/g3sek
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|