>
>> ? No tetrode can be used in such a way to produce a practical linear
>> amplifier. Tetrodes are designed to be grid driven using a regulated
>> screen supply. They work best when neutralized and not driven into the
>> grid current region. However, only tetrodes that are designed for Class
>> AB1 will work well. The 4-400A and 4-250A were designed for Class AB!.
>> The 304TH and 833A were designed for Class C operation -- i.e., they
>> will only draw the rated current with substantial grid current, and that
>> makes ssb doo-doo in AB1.
>
>The 304TH and 833A are moderate mu triodes, not tetrodes.
? Indeed. Sorry for the blunder.
>They are specified for grid driven, AB2 (linear) service ...
? Where is this specified? There is no such thing as a triode, Class
AB2 grid driven linear amplifier. . Cathode - driven, yes.
>........
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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