When I was selling audio in the 70’s, I sold and delivered a new system to an elderly man. He owned a Fisher tube integrated and a Fisher tube tuner and he gave it to me! I had our service tech go through it ( it needed nothing) and used it for a few years. I kept them around and used them on and off. They had that really lush and addictive midrange. I lent them to a friend who was between systems and he got divorced and his wife wouldn’t let him take the system, even though she knew I lent it to him. Eventually, I got them back but I think she ran over them with her car because they were in totally damaged shape. When I questioned her she said the moving guys dropped them out of her second floor window. I knew she was lying. I wish I had those 2 pieces today as I would have used it in my office with some very efficient speakers. The tubes were EL34 I can’t remember what the rectifier tube was but I think there were something like 12 or 13 tubes in the integrated and a few in the tuner.