TK,

We got a correction to the FG model. I guess you and I were right. (from Rosemary's new forum, click on "Paper 1")

But I see there is an error with the R_L1 inductance; it should be "2.23uH", not "2.23mH".

Quote from: poynt99 on June 09, 2012, 08:15:51 AM
TK,

We got a correction to the FG model. I guess you and I were right. (from Rosemary's new forum, click on "Paper 1")

But I see there is an error with the R_L1 inductance; it should be "2.23uH", not "2.23mH".

Heh.. I didn't notice that one. But look at the circuit diagrams in the two papers: they now agree, with the "q2" stack on the same side on both diagrams.

But they chose what I consider to be the wrong one -- the one that Tar Baby does use usually and that Ainslie has claimed is correct -- since it will subject the lone Q1 to high currents when the gate drive is HI. It makes more sense to me to use a stack of parallel mosfets to carry this high current, and a single mosfet will do just fine handling the low current from the oscillations. And Ainslie has said that the mosfets don't get hot during operation, and the only way this could be true is if there are 4 mosfets in parallel on large heatsinks handling the high current when the gate signal is HI. So for this reason I continue to believe that the diagram with the 4 mosfets on the "RIGHT" where they would receive the positive FG signal at their gates is the actual, correct, diagram to use for the high heat modes with substantial "on" times.  There is no reason at all for the heavy heatsinks if those transistors are in the "q2" role.

She cannae take the strain, Captain!

Grrr.

This incident has also blown my F43 function generator. And I don't have a schematic or manual for it.

I'm sure this will make certain parties very happy. Me, it's all in the game.



(But if anyone can find a schematic/manual for my Interstate F43 High Voltage Function Generator, I would be happier than I am right now.)

Sorry to hear about the FG. What mode caused that?

If all else fails, you can always try tracing out the output section.