Personally, I would not use a bulk eraser to demagetize tape heads because of it's very strong magnetic field. However, it might work, I've just never tried it.
The procedure to demagnetize is simple. Just start from about a couple of feet away and the move it towards the heads slowly, passing over the heads a few times. Then pull it away slowly before powering off.
That's the procedure I've used for years, except I've always used an eraser with prongs and not a bulk eraser.
I would rather see you buy an eraser intended for head demagnetizing.
Jim
The procedure to demagnetize is simple. Just start from about a couple of feet away and the move it towards the heads slowly, passing over the heads a few times. Then pull it away slowly before powering off.
That's the procedure I've used for years, except I've always used an eraser with prongs and not a bulk eraser.
I would rather see you buy an eraser intended for head demagnetizing.
Jim