Markus;
If you have the time-hasn't got to be right now-first, Merry Xmas to you and family from us.
Is SAQ transmitter output determined by tuning of antenna.  If over coupled would signal loose it's nice T9 tone and signal widen? 
The giant alternator essentially behaves like a self excited osc transmitter?  Setting antenna couple just right for max output with stable chirp free tone? 
 It is essentially dumping keyup into a large dummy ant like an arc transmitter?  Then simplifying tune-up so ant match and coupling be similar to keyup condition into dummy ant?
Bob