An amateur regulatory constraint of 1 watt eirp limit starts to bite in
to the transmitter power budget for taller (more efficient) antenna
systems.

Bites in even more with a smaller antenna surely!

Didn't Dud Charman's indoor antenna circus demonstrate the truth of the
axiom that a small antenna has the same radiation pattern as a very small
antenna?
Maybe a decommissioned Decca site could be better used to demonstrate the
efficacy of passive reradiation from an adjacent tower.

Bob VE7BS (ex-G3AGQ)