Just did first test with signal generator and single transistor on 1:1 transformation ratio. First thing I did notice - the BEMF on primary is not affected when secondary is shorted. The meter show half amps reading than on output. With oscilloscope it is less difference between input and output amps but looks promising. Will do 220V secondary now and see results later... 
P.S> transformer gives ratio 0.75 on voltage, both coils have identical 2mm diameter wire and same number of turns.

P.S> transformer gives ratio 0.75 on voltage, both coils have identical 2mm diameter wire and same number of turns.
Using a resistor for a load will make things easier as well. I posted a link to a tutorial a few days ago on how to measure Real (Active) power delivered to complex impedances such as a transformer primary, by just measuring RMS voltages, if you are interested. By the way, what is the make and model of your scope?
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