Apologies but I have just seen this thread, being a newcomer to the forum
mgb_phys is in error-or, at least oversimplifying. the capacitance of a high voltage power line is definitely not the major source of losses. Resistance is. A line may be inductive or capacitive depending on its length...
The load current is determined by the voltage and the circuit impedance- NOT by the current rating of the transformer. Suppose the output voltages were 100 and 10V and the load impedance was 100 ohms. Ignoring the transformer impedance, you would get a half cycle current of 1.414 Apeak...
Sorry to be so late to this thread. a previous person (born...) has it right. If you consider the use of an image 12m below ground, the ground plane will be an equipotential which is not concentric with the conductor as in a coax.
400=(1/2pie0)rho* ln2h/r as a result where 2h=2*12m and r...
Sciurus is right. All you get is a small increase in open circuit voltage as well as in the internal impedance so that you may get a bit more or less current in a load than with the step up transformer alone. What you won't get is the higher voltage of the step up transformer along with the...