[Amps] D.C. on filaments of GS-35B?

[nemo zilch]

Seems to me it would be good to use a dc supply for the filament of the
GS35B amp I am building.  Easier to build an effective soft start circuit,
 easy to build the supply. I understand why dc is not good for tubes which
do not have cathodes, the effective bias is different from one side of the
filament to the other.  Thus emission does not take place uniformly along
the filament.

But is there any reason not to use dc on an indirectly heated tube such as
the GS35B?  Advice appreciated.

Bob W4AOS


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