PSU III transformer information.

[bob orbell]

Hi all, many of you may know that I use two power supply's, one for Pre the other for Phono, can someone give me information about this transformer used in Phono, it continually pops the HT regulator I made and fitted, the other works fine. It has just popped again and on the bench I am reading 318 volts AC, and 420 volts DC, unloaded, obviously, too high, this transformer is a bit larger than the other one which is from WAD days, the one with the problem is from WD, it is made by Tiger Toroids Ltd, part no. TT1641, there are two more no's. P.01379 608868 and F.01379 608871, there are no voltage ratings, pri or sec, can anyone help please. Bob