Jon Ogden wrote:
>>In linear operation there has to be a compromise between output power and
>>IMD.
>
>Unfortunately this seems to always be the case! Except you forgot
>efficiency. One can have poor efficiency, good output power and good IM
>(class A).
Class A gives poor efficiency and good IMD, but poor output power
compared with the same tube operated in class AB1 or AB2.
I tend to downplay efficiency, because a "linear" amplifier adjusted for
efficiency is usually a menace on the air. If you want to put out a big
signal with good IMD, you have to be willing to pay whatever the
electricity bill comes to.
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.demon.co.uk/g3sek
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