MOT Experiment

• To: tesla-at-pupman-dot-com
• Subject: MOT Experiment
• From: "Gregory R. Hunter" <ghunter-at-enterprise-dot-net> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Sat, 24 Oct 1998 11:02:09 -0600
• Approved: terryf-at-verinet-dot-com

The other day I wired a DMM set on AC Amps function in series with a 115V
600W MOT and measured its magnetizing current.  To my surprise, the thing
drew 2200ma with no load!  Core CCA is about 2.4 square inches, and based
on the turns-per-volt of the low voltage filament winding, I calculated its
primary turns at 132.  I'm no EE, but over 2 amps of magnetizing current
seems excessive.  If I use four of these to achieve 8KV, they will draw
almost 9 amps of current with no load.  I like to tinker with MOTs because
they are cheap and plentiful.  Unfortunately, they also appear to be on the
very edge of saturation!  I'd still like to try to make a Tesla coil power
supply with MOTs, even if they are wasteful.

Greg

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