to prevent overloading the 200 watt unit be sure the coil is more than 100 ohms resistance. 130 ohms like the one I mentioned above would be ideal. google copper wire resistance to find charts that show wire gage and resistance per 1000 ft.

 

To deGauss one weld takes less than 3 sec. I turn up the Variac to full output, place the coil over the weld, pull the trigger, hold the trigger while rotating the Variac knob to zero with the other hand.

I left less residual magnetizm in a weld (as determined with a boy-scout compass) using the Variac than by slowly moving the coil away from the weld.

 

Hi Kermit2,

following your recommendation for 130 ohms would i still need the thermistor? (knowing that the power would be turned on maximum three seconds)

I forgot to ask but is there other types of windings for degaussing coils? (flat coils, or specific windings)

Thank you!

 

I forgot to ask but is there other types of windings for degaussing coils? (flat coils, or specific windings)

Thank you!

What are you trying to de-Gauss exactly?
For TV applications anything other than the coil itself is not needed, the duration needed is normally no longer than ~10secs.
Max.

 

Hi MaxHeadRoom,

Message #1:

My grandfather had one many years ago (he said it was hula-hoop sized) for clockwork repair, i look for something similar.

Message #8:

the degaussing coil is for clockwork (swiss & east european), that my grandfather is repairing, as well being in use in his toolshop.