another small breakthrough on our NERD technology.

[poynt99]

Or when the current discharge must somehow stay robust notwithstanding 1050 Ohms of resistance in its path through that function generator.

Rosemary,

I know where the 50 Ohms comes from, but where does that extra 1000 Ohms reside? Did you see the diagram I posted in REPLY #1475?

[TinselKoala]

To aid in interpreting the photos from Rosemary's video, here's what the IRFPG50 mosfet looks like, front and back. When looking at the front of the TO-247 case style, with the pins down, the pins from LEFT to RIGHT are GATE, DRAIN, and SOURCE.

When looking at the back of the TO-247 case, the shiny metal area is referred to as the "tab" in analogy to the TO-220 package, which is the standard for lower-power mosfets. This tab is also connected internally to the drain, or Pin 2 the middle pin. So really the mosfet has 4 connections: Gate Drain Source from the pins, and Drain again from the MOUNTING TAB. This can be insulated from the heatsink while still allowing thermal conductivity by using a mica or silicone pad and/or dielectric thermal "grease". If isolation isn't required the mosfet can be mounted directly to a heatsink but thermal grease should still be used.

For comparison I have attached the data sheets for the IRFPG50 which Rosemary uses, and the IRF830a which I have been using... until my ordered PG50's arrive. If you don't have 1000 volt voltage levels, why do you need a high-voltage mosfet in a heating circuit, especially if its Rdss is so high? Oh... I forgot... it's because the IRFPG50 is the Magic Mosfet.

[TinselKoala]

Rosemary,

I know where the 50 Ohms comes from, but where does that extra 1000 Ohms reside? Did you see the diagram I posted in REPLY #1475?

It comes out of her head. They must have some really strong weed in South Africa.

ETA: What about the Function Generator's "negative" or shield lead? In the pix from the video I think it goes to the common ground point B... but the circuit diagram, I mean the "corrected" one, shows it on the other side of the shunt resistor. What do you think about this issue?

[TinselKoala]

Rosemary claims that her device produces OU performance, based on numbers she (or somebody) has calculated from oscilloscope data dumps and spreadsheet analysis of those dumps. Yet she has shown NO COMPETENCE in actually interpreting or describing scope traces. In fact she's made many errors when trying to do that simple little thing, and she avoids doing it like it was a fatal infection or something. Which, for her "thesis" (actually only a conjecture) it is.

If any test  is to proceed without controversy, it must either avoid measurements (and the possibility of error and misinterpretation) at all, or Rosemary must show that she is competent in these matters. Since she's made so many errors and misrepresentations and misinterpretations in the past, she's got to address this point, by demonstrating that she now knows how to calculate correctly, interpret and display circuit diagrams correctly, use proper construction techniques and normally accepted terminology in her communications.

Let's start here. Rosemary, please explain the following items on this scope trace shot from your Demonstration video from last March.
What are the explanations of Items 7, 10, 11, and 12? What COLOR is the trace indicated by Item 7?  What is the explanation of Item 15? What is the explanation of Item 18?

[poynt99]

ETA: What about the Function Generator's "negative" or shield lead? In the pix from the video I think it goes to the common ground point B... but the circuit diagram, I mean the "corrected" one, shows it on the other side of the shunt resistor. What do you think about this issue?

TK,

My detailed analysis of the actual build from the video demonstration and my discovery of the connection error I made many many months ago still stands. If you wish, you may go and read all that. It's been fairly well covered.

.99