Testing the TK Tar Baby

[picowatt]

The following excerpt from an earlier post better provides some multiple choices from which to choose as to why Q1 is not functioning properly in FIG3 and FIG7.

Choose away:

"The facts are that the 'scope capture in FIG3 of the first paper (not the COP=17 article) demonstrates that during the portion of the FG duty cycle wherein the FG output is a positive voltage, approx. +12volts is indicated as being applied to the gate of Q1.  This is more than sufficient gate drive to turn Q1 fully on.  During this same portion of the FG cycle, however, the CSR trace does not depict the current flow one would expect to see when Q1 is turned on.  Possibly Q1 was damaged during these tests, although it is fairly rare for a MOSFET to fail open circuit.  Possibly, in the confusion of paralleling MOSFET's, Q1's gate and source lead were reversed, placing all five MOSFET's in parallel and in the common gate configuration.  Possibly Q1 was overheating, and as it was believed at that time to be in parallel with the other four MOSFET's, Q1 was innocently disconnected and the four Q2 MOSFETs only used during these tests.  Possibly a clip lead or connection to Q1 became loose and disconnected.  We cannot know what happened to Q1 at that time, but we do know that the 'scope captures indicate that Q1 was not connected, at the time of the related captures, as is indicated by the first paper's schematic.

As well, Fig 7 in the first paper also indicates sufficient gate drive to turn on Q1, and again, the CSR trace depicts that Q1 is not turning on."

[TinselKoala]

Dear little TK,
I remember your efforts here - well.  You never managed to get that oscillation.  It was laughable.

What a liar you are! Not only did I repeat your data nearly exactly, including your heat profiles, I also exposed your duty cycle error and I was the FIRST to ACTUALLY boil water with your circuit, as well as charging batteries and capacitors to high voltages. Your memory is failing you, Little Miss Mosfet.

Not actually.  They're of riveting interest to everyone reading here.  I'll get back to this point.  Trust me on this.  LOL.
I asserted NOTHING.  I repeated the opinion of those who saw that video.  It's widely contended that you INSERTED a fishing line into the video in order to denigrate Mylow's work.

You poor idiot. ASK STERLING, you fool. Mylow's own admission is still preserved on my YT video exposing him. HE ADMITTED THAT I WAS RIGHT. If anyone but you still believes that Mylow wasn't using fishing line, like I showed and like he admitted..... let them speak now, and justify themselves.

You most certainly ARE the issue. 

Rosie Pose

No, you liar. YOU are the issue: YOU are making unsubstantiated, mendacious claims, many of which have been soundly refuted, yet you refuse to admit it. That makes you the issue. ANYONE who does the work will find the same things that I've found.... and NOBODY will find that their batteries do not discharge, as you have mendaciously claimed.

[TinselKoala]

Not actually.  During the 'water to boil' tests we had 'trickle current' at best - coming from the battery.  And WAY more energy returned than ever delivered.

If you are going to refer to my work then at least keep to the facts.  They're clearly evident in our paper.

Rosie Pose

You are lying again. Your own statements on the day of the trial show just how much of a liar you are now, or then, or both. You never boiled water, you stuck an overheated element into some water and it sizzled a bit while it cooled off. Your claim of the 5.9 megaJoules is simply a lie, and your scopeshot that shows what you believe is evidence for your claim is actually showing a partially failed mosfet from overheating. Those are the facts, Ainslie, and what is clearly evident in your "paper" is that you have no idea what you are talking about, and THAT is why it gets summarily rejected by people who DO know what they are talking about.

[picowatt]

@PW: The experimental trial that generated the Figure 7 scopeshot is best described in her blog posts 117 and 118, which I have linked to previously. The Fig 7 scopeshot was taken near or at the end of that trial. She has also said various times that that trial had to be stopped because of some kind of thermal runaway behaviour. The trial used a full 60 volt nominal battery pack, indicating 62 volts plus most of the time. Later "high heat" trials, including the one in the video, use 48 volts in the battery pack.
In the scopeshot compendium that I've made, I've preserved the original filenames whenever possible. The "SCRNxxxx" names are auto-assigned by the scope, so the chronological sequence is preserved, mostly.

I've been playing around with a Class-E autoresonating Tesla Coil over the past couple of days, and earlier today I failed a NTE2922 mosfet, eleven dollars each, from overheating it while messing around with coil matching. It failed, drain-source not exactly open but with about 1 megohm between them either polarity, and gate-source conducting at about 300 ohms. Weird. But at least it didn't explode like yesterday's TIP122 Darlington in another circuit... groundloop's H-bridge driven far too HF....   

TK,

Yes, it is possible for a MOSFET to fail in an open circuit or mostly open circuit failure mode.  You will likely agree, however, that this is more rare than failing in a shorted condition.  However, it is quite possible to fuse open a die connect lead/die connection or fracture part of the die itself, so a failed Q1 is always presented as one possible explanation for Q1 not turning on in FIG3 and FIG 7. 

As to your 2922... ouch!

PW

[Magluvin]

I asserted NOTHING.  I repeated the opinion of those who saw that video.  It's widely contended that you INSERTED a fishing line into the video in order to denigrate Mylow's work.

Actually, I believe Mylow admitted wrong doing and was ashamed of it. But then kept going for a bit. He had motors all the way over on a couch under a pillow, that we could actually discern along with the direction of the fishing line. Mylow even stepped over the line, while standing on the table making the table vid.

And there were many instances of Mr Hand in the early videos. Then as we protested, he moved on to the fishing lines. As our complaints about Mr Hand put him in a position that he had to keep the motor in full view of the camera, thus no possibility of Mr Hand.

Mylow went on with his deception for quite a while. I was surprised how long he lasted. There was even the MIB story that they took his motor then brought it back and said here is your toy. Drama = distraction.  Mylow was a little nutty. ;] And a bad Magician. ;] But he gave it a shot.

Mags