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Primary fuses
I have found that some transformers in cheap electronics do have a primary fuse, it is located in the transformer under the cardboard covering the primary side. It is connected between the input wire and the begining of the windings. Sometimes if you are carefull you can cut the cardboard vertically with an Exacto blade and peel back the layers to get to the fuse. It can be a pain, but if you have a transformer with multi-tap secondarys that is impossible to find and it presents with the primary open, it's worth the look. All you have to lose is some time. Crown Power Amps do it right, they have the normal fuse holder on the rear panel, plus there is another one inside the amp, rated at 1 amp higher so when the road tech wraps a fuse with foil and makes it a zillion amp no-blow fuse, the amp has an internal backup.
Richard.
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