Hi Andrea,
Just bought a board from you for the Dumbleator and see it has a voltage doubler to go with the 135v transformer, typical for me i have 250v toroidal transformer [urlhttps://www.tube-town.net/ttstore/toroidal-47va.html][/url] is there a way to make it work or fudge it in my case with the pcb or does it need the proper transformer?