Grumpy_Mike,
Correct me if I'm wrong, but although the dissipated power won't increase, by stepping down the voltage a higher current can exist in the isolated rlc loop. Of course this will only happened if the intrinsic resistance of the coil is decreased.
Also, the radiated power is dependent upon the current through the coil, not the driver voltage.
One thing I forgot to mention is that a sensing lead is connected between the coil and cap which carries that signal to a sensing pin on the em4095.
Thanks.