[ARC5] OK Smart People - Mystery 211s

[Kenneth G. Gordon]

On 16 Jun 2012 at 9:42, Neil wrote:

> > Connect the grid to the plate, and apply normal filament voltage to the tube.
> > Insert a millimeter in the plate voltage lead, and apply something like 45 volts
> > to the anode, or whatever voltage is necessary to achieve about 250 mA of
> > plate current. Watch the meter. At some point in time, plate current will start
> > to rise, and may rise very rapidly. At this point, shut off the anode voltage.
> > The tube should be ready to use.
> 
> Surely this will lead to severe grid damage?

Might: depending on the tube. 

Ken W7EKB