I tried the unmodified Ainslie circuit on a small motor. It works great! Maybe even better than a commercial PWM circuit I have using a controller chip.
When I switch the recirculating diode in and out, an interesting thing occurs. The Ainslie load is out of the circuit; in its place is the motor, with the 18v instrument bulb in parallel.
With no diode, I set the pulse width at around 50 percent using the FG. The bulb is a certain brightness and the motor sound indicates a certain rpm. When I switch the diode into the circuit, the bulb gets dimmer and the motor goes faster. Either the 1n4007 or the MUR1100, they both produce the effect, perhaps the 4007 a bit more.
I would say that so far, this is the most interesting "physical" effect that I have noticed with this circuit. Of course, there are many interesting "psychological" effects as well. I've already done my part in demonstrating them, on the various forums where I have encountered Rosemary Ainslie.
Ainslie's blog, where the patent application and the EIT paper may be found:
A discussion thread about Ainslie's theoretical framework, with some details from her about her academic and scientific background:
The thread where I have been posting my work with this circuit:
And finally, the thread where Ainslie is currently posting, from which at least two of my relevant posts have been removed by "moderation":
(Edited to replace "most" with "at least two".)