On Rossi's journal someone asked a question of him about the gain of his hotter operating ECAT. In his answer, Rossi suggested that the gain of the gas powered unit was 3 when the gas is actively heating and infinite by definition when in gas standby. The device is being heated by the gas for 50% of the time, so the net gain is 6 averaged over a cycle.
This is consistent with his earlier statements and does make sense according to an earlier model I constructed. My model demonstrated that a positive feedback mechanism can go both ways regarding power out versus time. Many times we tend to think of positive feedback as leading to serious run away in temperature as the device continues to get hotter with time. I was waken up to the fact that a device with positive feedback also has the other mode of operation. That is, the output power and thus temperature can progress toward zero. My model demonstrated that if you intercept the falling power on the way down with heating, in this case with gas, then you can reverse the process and kick the device back into the power output increasing mode. This will continue toward burn out unless you judiciously cut off your drive power at the proper time. As long as you do not wait too long, the internal heat generating power mechanism will then reverse back into the falling mode. My model actually worked very much in line with Rossi's 50% duty cycle and adds support to his claim in my opinion. The issue that I worry about is the critical timing for the cutoff of the gas burner. If you miss the cutoff past a tipping point, the device will continue toward its high temperature output out of control. Perhaps Rossi has discovered that this situation may not be too disadvantageous since a mechanism either leads to self reversal of the power output due to some inherent protection, or minor melting of the mixture. One or both paths might result in regained control. It is apparent that Rossi does have a working device. The main question is when can we convince the world that LENR is real, useful, and available. Dave
