"Don Pearce" wrote in message
...

No. Firstly it would only be electrons that actually chanced to hit
the grid that would stick, and secondly once even quite a small charge
had built up, the rest of the electrons would just get deflected
slightly away from the negative grid wires and no further charge would
build up.


If the electrons hit the grid with enough energy to cause secondary emission
then the grid potential would be driven positive until it reached the same
potential as the anode. Whether secondary emission would occur would depend
on the anode potential and the design and material of the grid.

David.