Toroid trans usually hum way less than a standard shape. One point might be to tighten the bolt holding it down. The usual deal for toroids is a bolt down the middle.
By the way, the fact they put in a toroid means they spent MORE MONEY than they had to: the toroid cost more than an ordinary transformer. (for the same voltage/ etc) Of course, maybe they got a deal an a couple tens of thousands of crappy toroids??
By the way, the fact they put in a toroid means they spent MORE MONEY than they had to: the toroid cost more than an ordinary transformer. (for the same voltage/ etc) Of course, maybe they got a deal an a couple tens of thousands of crappy toroids??