Magnapack

[tim123]

New thread started on the Rotary Transformer...
http://www.overunity.com/13777/tinmans-rotary-transformer/

[poynt99]

Bill:

My suspicion is that the neo magnet reduces the energy storage capacity of your JT core.  In other words, it lowers the effective inductance of the core + coil arrangement.  That should tend to make the JT oscillator run at a higher frequency.  Some bench tests could be done to see if an approaching neo will do that to the core.

MileHigh

MH is right. Bringing a magnet close to the core will bias (polarize) the core causing its permeability to decrease. Hence the inductance of the coil decreases.