It will not sunc to nromal VGA frequencies. Period. I
cna't think of a PC
video adapter that will easily drive it, either.
You can use ArcadeOS in DOS or PowerStrip in windows to create a mode
with 15KHz horizontal sync. I use it here at my home. Almost all PC VGA
adapters works. Of course, you'll not have full VGA resolution since the dot
pitch of the tube (and the resolution of the circuit itself) will be way
lower. I'd not go above 320 x 400.
Good luck!