[AMPS] Filament Inrush Current Limiting

[Wt8r@aol.com]

Specifically, is it necessary to limit inrush current at turn-on in a 8877 
tube?  

If some filaments do not require current limiting, what is the characteristic 
of a filament which requires limiting the current (I understand that a cold 
filament has less resistance than a hot one) ?

I have not seen a definitive answer although I have not been subscribed here 
for all that long.

Thank you to those who contribute here to make information available.

Dave, WT8R

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