You sure it's the transformer?
I had the 2n3055 go bad in the HV oscillator when I was restoring a 454.
They don't build those transistors like they used to and not all of them
will work in the circuit. I had to sort through my pile to find one
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@AuroraGrp.Com | Unix/Linux - We don't do windows