A system of the type you suggest could also mask a negative resistance region. It effectively has a similar outward appearance since it is also an oscillator. The reason that I suspect that we are seeing a consequence of the existence of a negative resistance region is that they mention using an autotransformer to power the input heater winding. It should not be possible to set the transformer and leave it so that a constant output power is obtained unless the positive feedback is restricted so that the expected negative resistance region is absent. My bet is that they are continuing to adjust the input voltage manually to keep the output power relatively constant. That is why I consider their system a human controlled oscillator!
The answer to your question should become apparent as more information becomes available. Hopefully, the experimenters will soon outline how the output control power was maintained. Dave -----Original Message----- From: Eric Walker <[email protected]> To: vortex-l <[email protected]> Sent: Mon, Oct 5, 2015 11:37 pm Subject: Re: [Vo]:Human Controlled Oscillator On Mon, Oct 5, 2015 at 11:01 AM, David Roberson <[email protected]> wrote: I consider this oscillator behavior an excellent additional indication of proof that the Rossi effect is taking place during the experiment. Please forgive my ignorance of your thought experiment. Couldn't low-frequency oscillation also arise when a temperature spike within a large thermal mass is counteracted by a low-quality, on-off temperature control, similar to an old mercury thermostat in a house? Eric
