[Amps] Grid fuses (was: Life and gain of 3-500Z)

[Tom W8JI]

>R L Measures wrote:
>> As I see it, the lateral EMF from grid-I during a 
>> parasite bends the
>>filament sideways, in some cases causing it to touch the 
>>grid.
>
> But despite repeated requests, you have never provided a 
> detailed
> explanation for this bending force, in terms of the 
> familiar "left-hand
> law" that makes an electric motor work; or identified what 
> is special
> about "parasites" that could cause this behaviour.

I calculated that force long ago based on the saturated 
emission limits of the 3-500Z.
The force was in the order of several grams. Normal 
operating forces caused by AC in the filament were higher.

73 Tom