[TowerTalk] 3/8 Wave Vertical Questions

[K3VX]

Antenna gurus:

I'm feeding a 3/8 wave (for 80M) inverted L against ground using an AH4 tuner.
The idea was supposed to raise the point of maximum current above the base of the L.
But on page II-21 of Low Band DXing the 3/8 wave vertical is fed 1/8 wave above the low end of the antenna.
It also seems there's no ground connection - coupling indicated by a capacitor symbol. 
ON4UN shows the impedance as 300 ohms - is this balanced or unbalanced in his configuration?

So am I fooling myself thinking that the high current point on my inverted L has moved up the antenna?

TIA and 73

Larry K3VX