4 Grids

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Rich" <rdjmgmt-at-socket-dot-net> 

I was bringing a 304tl up to operating voltage on the filaments.  Well I 
guess they call the 304 for a reason, 3 for triode and 4 for the 4 
filaments. One tube has one bad filament. I have the tube set up on a 
series circuit because my main filament transformer is 10v. I found out 
quickly I can't run it that way. One filament will pull to much 
voltage.  Before I junk the tube, I could wind another 5v trans, has any 
one ever run one with just three of the filaments.

Rich