thanks .Its a DIY job. They are hammond 1650e transformers - one has gone to heaven.It might help if you mention the amp? Of course if it's a home brew then the trafos may be unknown anyway. I'd be inclined to pop an advert onto DIYAudio as well, there's folks there with these kinds of things lying about.
Assuming t'other one is fit and well, you may be best off just to replace the Hammond like-for-like. They're available with a few days shipping for about £120.thanks .Its a DIY job. They are hammond 1650e transformers - one has gone to heaven.