[AMPS] Triode conected Tetrodes

[Rich Measures]

>
>> €  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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