I was browsing Eimac data sheets for possibilities of upgrading my homebrew RF deck (such as substituting 4-250's for the 4-125's).
The two filament transformers are 5 volt, 14 amp and each 4-125A draws between 6 and 7 amps.
But according to the data sheet, one 4-250A filament supposedly draws the same 14 amps that the 4-400 does? Why
So unless I wanted to replace the fil xfmrs too, the only thing I could do to increase available plate dissipation would be two 4-400's instead of the four 4-125A's... not cost effective...
Is that data sheet in error or does the 4-250A really have that beefy a filament?