[Amps] Re: matching network

R.Measures r at somis.org
Sun Feb 1 07:25:50 EST 2004



>R. Measures wrote:
>>>>**  Ian --  How does one convert this figure into a determination of
>>>>how grid current divides between the grid and the screen during g-g
>>>>operation?
>>>
>>>
>>>Sorry, maybe what I said was misleading - I'm not sure if it's possible
>>>to calculate Ig1/Ig2 in cathode-driven operation directly from mu-g1g2.
>>>
>>>They both result from the tube's internal tube construction, however,
>>>which is why I believe that if one is high, the other will be too.
>>>
>>**  So if a tetrode with a g-/g2 amplification of 4 to 5 has c. 25% of
>>total grid current flowing in the screen, a tube with a g/g2
>>amplification of 13 might have c. 8% of the total grid-current flowing in
>>the screen?
>
>Couldn't say... you'd have to do a point-by-point analysis using the 
>characteristic curves.
>
**  Ian --  The sticky wicket is that there are no characteristic curves 
for 0V on the  screen.  


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