DIYbanter - View Single Post

mike[_22_]

On 3/23/2015 9:13 PM, wrote:
Just use a Weller type soldering gun, the kind with the heavy copper tip that is made from a piece of about 9 or 10 gage copper wire. Hold the part in between the legs of the coil and pull the trigger. Let go of the trigger. If you stopped current flow at the peak of the sine wave you get a lot of magnetism; if closer to zero, you get less. Just try it until you get the amount you want.

What happens if you put a diode in series with the magnetizing loop?
Probably need another diode passing current outside the loop on the opposite
half-cycle to keep the transformer happy.
example of gun:
http://www.testequipmentdepot.com/we...tguns/8200.htm

Also works for demagnetizing stuff. Pull trigger, put part in, then slowly pull part away, until part is about 2 or 3 feet away before releasing trigger.

Pete Stanaitis
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