Hi, I was wondering if anyone knew if you could use a magnetic amplifier: http://en.wikipedia.org/wiki/File:Magnetic_amplifier.svg as like a variable resistor for controlling current from the source to the load? I imagine there would be a large voltage imposed across it when it is a high impedance. Thinking just about the source and load electrical circuit: What sort of range of impedance would a magnetic amplifier have in this respect (as a variable impedance), could it go from acting like a really low impedance circuit component (of near zero ohms) to one in the M Ohms? If so, if you've got a couple amps going through it and it looks like say 50 Ohms, is all that power being burnt up in the core of the Mag Amp in heat? So the impedance of the Mag Amplifier being seen from the source/load side of the electric circuit, is that the magnetising branch impedance of the Mag Amp? Thanks a lot!