Is a Pleiades V6 mic booster electron tube amp possible with a DC90?

Referring to the Pleiades V6 schematic.


Filament cathode current of the DC90 triode electron tube is only 50mA.


Would it work with say 12V at the anode and Pleiades bias (a high R from anode to grid)? Thus letting grid intersept [Western Electric] the electron beam. Grid would still be negative wrt cathode by the proximity of the electron space charge but less so making anode current possible at low plate voltage. Only 50-100μA or even much less anode current is needed for great mic sound and low noise. Graceful instantaneous peak limiting should be possibly when mic is driven by higher SPLs.


1 or 2 very small 12V type garage remote control type batteries for anode supply should last for weeks or months. 1 AA 1.2V rechargeable battery for filament cathode should last for at least 20 hours.


(Always use a fuse in series with a battery for safety).


Reference:


Principles of electron tubes - Chapter 5 grid controlled tubes - Western Electric - Bell Telephone Labs series