On 05/13/2016 01:57 PM, gregebert wrote:
> NEVER use a microwave oven transformer; they are deadly because there is no > current-limiting, and their voltage is probably too low anyways. A MOT actually IS currently limited using the same stray flux technology as neon transformers. If you look at a MOT, you'll see the center leg has an air gap just like NST. The dangerous part is that they current limit at several AMPS at about 2kV. Very deadly. But very handy too. You can saw the secondary off, put a few turns of welding cable in its place, add accessories and have a mighty fine spot welder. The stray flux limits the current so you don't blow a breaker with the short circuit during spot welding. Take two and connect the primaries voltage additive, figure out the correct number of turns and connect the primaries to 240 and you have a fine welder. You can vary the current by varying the air gap. More gap == more current. I once made a handy little portable welder by cutting about a half inch off the center leg and then arranging a lead screw and nut that drove a wedge of laminated iron into the gap. Retracted wedge == more heat. Because they're so handy, I grab every MOT I can get my hands on. John -- John DeArmond Tellico Plains, Occupied TN http://www.tnduction.com <-- THE source for induction heaters http://www.neon-john.com <-- email from here http://www.johndearmond.com <-- Best damned Blog on the net https://www.etsy.com/ca/shop/BarbraJoanOriginals/neu <-- Fine Art Originals PGP key: wwwkeys.pgp.net: BCB68D77 -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/573648F6.5040000%40neon-john.com. For more options, visit https://groups.google.com/d/optout.
