RE: MOT leakage

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Steve Conner" <steve.conner-at-optosci-dot-com> 

 >The noise is so loud that I cannot leave it
 >as it is.

The reason why it is so noisy is that the MOT is designed with an undersized
core to save money. This means that the core saturates and hence leaks a lot
of magnetic field, making any ferrous metal nearby vibrate.

It may get slightly quieter under load, as the IR drop in the primary will
reduce the maximum flux that the core sees. But to get a big improvement you
might have to build a new transformer with a larger core area or more
primary turns.

You might like to try "mating" the E parts of two identical MOTs together
and connecting the primaries and secondaries in series. This will give the
same output voltage but will half the peak flux density so it should run
much quieter and leak less flux.

Steve C.