Rosemary Ainslie Circuit Demonstration June 29, 2013 Video Segments

[TinselKoala]

AHA.... I have Yet Another possible explanation for the Figure 3 scope traces.

Look at the way the wires are attached to the mosfet package leads on Ainslie's apparatus. They are soldered to the leads by lengthwise splices. This means if the solder softens the wire will come loose, it isn't mechanically restrained, just "glued" on with solder.

Tar Baby uses Molex-type sockets with spring pins pressing hard against the mosfet leads. The shell might melt but the spring pins won't lose contact.

My heatsink temperatures exceeded 260 degrees C before the mosfet failed. The mosfet itself would have been even hotter.

From WIKI:

Tin/lead solders, also called soft solders, are commercially available with tin concentrations between 5% and 70% by weight. The greater the tin concentration, the greater the solder's tensile and shear strengths. Alloys commonly used for electrical soldering are 60/40 Tin/lead (Sn/Pb) which melts at 370 °F or 188 °C and 63/37 Sn/Pb used principally in electrical/electronic work. The 63/37 is a eutectic alloy, which:
1. has the lowest melting point (183 °C or 361.4 °F) of all the tin/lead alloys; and
2. the melting point is truly a point — not a range.

"Do the math" (tm RA).

[TinselKoala]

From the photo on PESN:

The VBatt probe has had its ground ref wire pulled out of its little connector cover. It needs repair, it isn't just unclipped.

Of course one cannot tell from the demo cellphone video if this has been fixed for the demo last Saturday.

EDIT: I was wrong, I was able to find a frame that shows the board in enough detail to make out that the Vbatt probe reference lead has been repaired and is present and accounted for at the June 29 demo.

[TinselKoala]

Test-to-failure video coming up in a few minutes:

(A discontinued link)

EDIT: grr. that one had the aspect ratio screwed up (my fault totally) so I'm uploading another copy.

http://youtu.be/ygu7ljn1SqA

Sorry about that, it will be an hour or so until it's viewable again.

[markdansie]

Holiday Reading
http://revolution-green.com/2013/07/04/rosemary-ainslie-live-demo-analysis/
Kind Reagrds

[TinselKoala]

Mark, I see that you have linked to the full four hour video. Having watched it all several times I can say that it is very very difficult to watch in its "raw" form. From moment to moment you have no idea whether something important is about to be shown, or will they lay the cellphone down and just walk away again.

I've carefully gone thru the original and I've excerpted the significant segments and made a playlist of them. I've also included in the playlist a few of my own videos that explain and demonstrate the issues that were supposed to be addressed by the Donovan Martin team. I have not edited or altered anything within the clips. On one of them ... the attempt by Martin to find a simple frequency... I did put in a comment at the end of the video but otherwise my comments are in the YT videopage comments or description for the individual clips.

Please feel free to put the entire playlist, or just the clips from the Ainslie show only, or any selection from the playlist onto your site. It will save people a lot of frustration and a significant amount of time, I think. And if anyone notices anything significant that didn't make it into my clips, please let me know , with a timestamp, and I'll go back in and find it and add it to the extracts.

http://www.youtube.com/playlist?list=PLml9VdOeqKa_6b8yMpkYJHIR7F9ah3-1q

This playlist does NOT contain the "donny blooper reel" or the test-to-failure above, but of course you can link to them too.

(ETA: I've just realized it is Thursday, and I have been working on these videos and my own several demonstrations nearly fulltime (real fulltime, not 8 hours fulltime) ever since the demo started on Saturday morning.)