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Re: [Amps] Re: matching network

To: "Ian White, G3SEK" <g3sek@ifwtech.co.uk>," AMPS" <amps@contesting.com>
Subject: Re: [Amps] Re: matching network
From: R.Measures <r@somis.org>
Date: Sun, 1 Feb 2004 07:25:50 -0800
List-post: <mailto:amps@contesting.com>

>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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