Your recollection of this is very clear and consistent. It is important that the community of folks here see and understand your result.
Do you believe or think that the thermal runaway only stopped the process because the Pyrex tube melted? Or was there some other indication of breakdown. I assume the FiberFrax did not fail, but perhaps something about the NiO became either activated irreversibly or reached a critical point at or even well beyond 830 C?
From your initial recollection I may have received the wrong impression that if a quartz tube (for example?) had been used, the 830 C might have been substantially exceeded and the device would (or may?) not have have failed.
Here is my deduction and reading from your excellent recollections so far: As you heated the tube externally below ~800 C there was no (apparent?) positive feedback loop, and the temperature rise in that portion of the curve was essentially determined by external resistive heating. As you reached 800 C, there appeared to be internal heat production, that is the temperature rise began to be dependent not on resistive heating, but instead (began to be?) dependent on the rate of H2 flow. This process reached criticality at 830 C, so that you had to tightly regulate H2 flow, otherwise the device would rapidly rise to a supercritical level and fail due to runaway heat that may have greatly exceeded 830 C.
Kindly correct any impressions or misimpressions I am giving in the above description. Now, in retrospect, I think we in this growing LENR community see how important your much earlier results to have been. I wonder if somehow your results came down through the "folklore" around CF over the years and came around again because some actually remembered your results, or is it just a coincidence and essentially the reinvention of a similar system in Ni and H2?
In your opinion, would there have been any chance that Piantelli, Celani, Focardi or Rossi to have somehow heard or read about your results way back whenever?
I personally have experienced "being too far ahead of the field" on a couple of occasions. Not in this field (yet?), but nevertheless I recall being told that "big ideas" are not welcome or are not to be pursued. Perhaps as a youngster in the 1950s I read too much about Michael Faraday, Humphrey Davy and others in the pioneering era of electrochemistry in the early 1800s. The idea of "too big an idea" in science came as a bit of a shock, particularly from a successful scientist. And I remember reading some years back how a young graduate student had fight with her advisor to pursue a "big idea". She (Candace Pert, who passed on not long ago) succeeded in overcoming resistance from above. I now know that many young scientists in training are not so persistent or so lucky to have the right guidance.