DS> don't use a magnet for degauseing the TV. What is used is a 
 DS> thin insulated wire rolled quite a few times into a large 
 DS> circle, it also has an on and off switch to turn off the 
 DS> electricty. It is like an electro magnet.  This is called a 
 DS> degauseins ring. 
 DL> An electro-magnet with no core. So do you use AC or DC in this? What 
 DL> makes a good power source? I ask because I have no 
Degaussing coils are designed to plug into 120 VAC 60 Hz, and function 
similarly to most tape bulk erasers.  They generate a magnetic field of one 
polarity strong enough to remagnetize the device being demagnetized.  As the 
AC current through the coil reverses polarity, so does the magnetic field 
polarity.  Your motion of the coil gradually away from the CRT (or tape from 
a bulk eraser) allows the magnetized device to be remagnetized with alternate 
polarities, of gradually decreasing intensity, until they reach a noise 
floor.  
For tape erasure, fancier higher speed demagnetizers exist which use a higher 
speed oscillator, ramped down under electronic control, for the same ultimate 
effect.  
Terry
--- Maximus 2.01wb
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