[Amps] Re: matching network

[R.Measures]

>R. Measures wrote:
>>
>>
>>>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.
>
>No *published* characteristic curves, for sure.
>
> ...

**   Indeed.   ...   getting back to g-g operation for a tube with a max. 
g1 rating of 2mA, I would not try it.  Even with a stripe-cathode and 
aligned grid, typical grid currents are c. 100mA in g-g triodes.  .