OK, let's say I put this antenna up, and I made some wide spacers from CPVC, or the like. What's the reflected wave looking at? In other words... how do I figger the impedance of the output tank? I see all sorts of stuff on the internet about feedlines and antennas, but most are assuming 50ohm "modern" transceivers.

Reading from "The Radio Handbook" Editors & Engineers 1946, the tank impedance is stated as Z= 2piFL squared/R where

Z= impedance, L=inductance, f=frequency in cycles, R=resistance in ohms. (Basically, the R in this case would be the inductor.)

In the chart given as an example, the Z is highest at resonance. In this case 18 ohms at f=2150. So, in a sense, the high impedance of the feedline and antenna are "bridging" the very low Z of the output tank.

Is this correct?