Question about grid behavior with triodes

Hello RAT friends,

I've looked in the books I have but there is not really a useable
explanation over the practical aspects over grid behavior,
particularly with the onset of positive grid current. A few questions
for the knowledgable.

1 Is there a formula over what the load impedance is of a triode
control grid is "normally" and when driven positive?
2 Does grid current only occur when the input signal peak voltage
reaches bias voltage or are there other scenario's?

Wessel

.

Relevant Pages

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