R. Measures wrote:
What Rich says is only true if both grids are connected directly to
chassis (and even then, the current division between g1 and g2 will
depend on the mu-g1g2 value for that particular tube).
** True, but g1-g2 amplification is typically 4 to 5.
Except when it's 13, for a 4CX350A.
** 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.
--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'
http://www.ifwtech.co.uk/g3sek
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