Altec 15095 advice?

[Quayhog]

Anyone use one of these as a 600 ohm input transformer?  I'm worried about the 15k secondary to a 12AU7 grid being high enough.  I'd like to use one as an input transformer for a Grommes G-101A's lowZ input.  The TL-1a is hard to find and the ones I have are installed in my G5M mic preamps.

I have loads of extra Altecs.