[AMRadio] Link balance

[D. Chester]

If the main coil with the tuning capacitor is balanced, and the 
antenna/feedline are balanced, it doesn't matter if one side of the link is 
grounded, or if the link is balanced and floating free from ground.  The 
entire link is located at the low voltage point on the main coil, and the 
coupling between the coils is purely inductive.  You can reverse the leads 
to the link and see negligible, if any effect at all, on the balance of  the 
main coil feeding the open wire line.