[Amps] filament instant heating query

[Charles Harpole]

to check on a supposition............

 

It appears possible that the sudden application of voltage to a tube filament causes degradation of the filament.

 

What seems to happen?  Is it possible that the very rapid heating of a filament could cause so much quick molecular action (rapid increased bouncing around of the molecules) that the shape of the filament could be changed?  A deformed filament could then be too close to other components to cause an arc, perhaps?

 

Or is the action on the atomic level...i.e., does heat change the actions of electrons in an atom?

 

But, maybe the filament rapid heating works just fine, and all of the "slow start" "inrush protection" circuits are a waste?

 

Another inquiring mind wants to know.

73,

Charles Harpole
k4vud at hotmail.com