Let me re-word part of this. It should have said, when the grid was made to be
positive, it causes heating of the grid which causes it to emit electrons which
is not good. This is explained in the text. Sorry for the screw up, I shouldn't
have been in a hurry to write it.
Best,
Will
*********** REPLY SEPARATOR ***********
On 7/23/06 at 2:07 AM Will Matney wrote:
>Pay close attention when reading this about the only possible way a
>control grid could become positive. It's under the portion about how a
>triode works. The control grid has to be heated hot enough to emit
>electrons. Under normal operation, a tube will be at cathode potential Vg
>= OV, or under Vg = -10 Vdc, etc. This is a very long article, but a good
>one.
>
>"Tubes 201" - How Vacuum Tubes Really Work;
>
>http://www.john-a-harper.com/tubes201/
>
>Best,
>
>Will
>
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