1 Craig B 8 months ago Unfortunately the OT of my '63 Bassman 6G6-B developed a short between the primary and secondary. Mercury Magnetics makes a replacement model: FO50BM-1. I have one on hand, slated for a future build, so I installed that for the time being. It sounds good and I'm happy with it.I called Mercury Magnetics to inquire about their transformer restoration service to have my original OT rewound. They charge $350 not including shipping to/from. That's pretty pricey, but it sounds like they do a meticulous job.Does anyone have recommendations of other high quality, reliable service to do a rewind?Have any of you used Mercury to do a rewind an care to share your experience?