+2 on what Ron & OG said.Yup it will have poor output,poor tone and burn up the amp in short order. I've been seeing these on eBay.Don't know if it could help.I don't have much experience with this particular tube amp.As Ron has said if you have a schematic in English will be able to help you much better.As most of us here are English speaking. That is German and looks like Greek to me. .

This might be the right transformer Peerless 15066.. I Don't know enough about that amp though.


Peerless Altec 15066 Transformer 70V 32 Watt Vintage | eBay