RK05 data problems with misaligned drive?

Yes, I beleive so. They don;t normally short, what happens is the insulation on the windings breaks down, and you get an unwanted earth. And then te magic smoke (and flames) come out. I will have to check the scheamtics, but since this is a 115V motor run off the primary of the PSU transformer, is it wired so that it has to stand 230V between one end of the windings and chassis ground? If so, it might explain why they seem tofail all too often over there. I am sure you know the blower comes apart. After removing it (4 Allen screws hidden by the foam seal), you can remove the ring under that seal (a few self-tapping screws), then the fan blades (Use a long hex key between the blades to undo the setscrew), and then seprate the motor from the fan housing (2 nuts). The motor itself comes apart by flicking off the clims and removing the end plate and rotor. But it is almost imposible to rewind it. I mention this because when one ofmine failed, a friend gave me a faulty blower with good winidings and bad bearings. And of course I made one good one from the 2. If you can find a suitable motro, you could probably fit it to the housing and fit the fan blades. A motoe may be easier to find than an RK05 blower. Of course all the screws are UNC sizes, you need imperial (inch-size) Allen keys and nutdrivers. But if you work on DEC stuff, you must have thsoe anyway. I think it;'s worth tryiong if you have a sutiable AC electromagnet. What do you use to rease audio recording tapes? -tony