user TURBO?s replication of Steven Mark?s TPU ?

[Spherenot]

Here are a few more pics showing some other sides of the TPU

cut8.jpg (large SM cross section): Does anyone else here see the difference between the profile aspect-ratio, shown in this picture, and the lower profile aspect ratio, about half, that one would get following the popular three-ring pattern?

If I was to take the three ring TPU design, (tested by otto, GK, and many others,) and cut it open I would expect to see an aspect ratio of about 3:1.  It would be even lower than 3:1 with more outer jacket windings.

However, the profile aspect-ratio, shown in this picture looks about (6~7):1.  I know the video quality is for sh!t but you do not need detail to see aspect ratio.  Even the dark 'detail' in the middle 'band' of the profile has an aspect ratio of about (4~4.5):1.

Also, what are those three lighter 'bands' at the top and three lighter 'bands' at the bottom of the profile?

Perhaps we need six inner rings, three near the 'top,' three near the 'bottom', and separated by a large gap?

SM's design is the master pattern.  I do not understand the discrepancy.  Maybe I am wrong here because I have not yet built one.  I just do not see cutting open the popular replication pattern here and seeing anything close to what we are seeing in this photo.

-still waiting for my scope...

[Vortex1]

Good catch on the aspect ratio's, Spherenot. Yes there seems to be a lot of empty space in the SM units as they are much taller, and wider with only a few visible turns in the collector.

There is much evidence that betrays the construction details of this unit.

Ref: Large17, Large18, Large27

Notice the paired wires (Litz and floppy white 4 in all) that are taped together exiting vertically from the back of the unit.

Two white larger diameter wires are taped to two litz wires. These are connected to one common mode choke.

This is repeated with the other two sets of taped wires, the other ends of the wires?

There may be more turns than shown in sketch.

Therefore this can possibly be a circuit closed upon itself, with the chokes at the ends for mixing harmonics yet keeping voltage potential separate.

There appear to be no other wires connected to these, making this a passive circuit isolated from the rest.

These wires appear to be the same type that were cut through in one video. (larger diameter floppy white and litz)

Notice the mounting tabs on both chokes. They were originally meant to be used for vertical or horizontal mounting to a chassis, probably surplus.

A good guess from the video evidence would be that no other wires connect to these chokes (no other wires in the center of the chokes.)

Note: Common mode chokes, which are typically used for line noise filtering, can also be used as very well matched 1:1 transformers.

I see no good use for these except for maintaining separation of voltage (isolation) between the Litz wires and the larger white wires as they could have been merely connected together. Is there then a reason for the use of these devices. Is this where the potential difference is isolated while allowing frequency mixing?

An alternate possibility is that the radiated A vector potential from these chokes is somehow utilized by the outer coils.

There are many clues in these vid captures. Study them carefully.

[mflynn44]

cut8.jpg (large SM cross section): Does anyone else here see the difference between the profile aspect-ratio, shown in this picture, and the lower profile aspect ratio, about half, that one would get following the popular three-ring pattern?

If I was to take the three ring TPU design, (tested by otto, GK, and many others,) and cut it open I would expect to see an aspect ratio of about 3:1.  It would be even lower than 3:1 with more outer jacket windings.

However, the profile aspect-ratio, shown in this picture looks about (6~7):1.  I know the video quality is for sh!t but you do not need detail to see aspect ratio.  Even the dark 'detail' in the middle 'band' of the profile has an aspect ratio of about (4~4.5):1.

Also, what are those three lighter 'bands' at the top and three lighter 'bands' at the bottom of the profile?

Perhaps we need six inner rings, three near the 'top,' three near the 'bottom', and separated by a large gap?

SM's design is the master pattern.  I do not understand the discrepancy.  Maybe I am wrong here because I have not yet built one.  I just do not see cutting open the popular replication pattern here and seeing anything close to what we are seeing in this photo.

-still waiting for my scope...

@Spherenot
Tesla had three coils in some of his MT experiments. Perhaps in the small TPU each grouping of coils have different purposes. There might be some combinbation of transmitter coil, receiver coil, and feedback coil. The MT coils only need to be very loosely coupled. Likewise, in the larger unit a transmitter section with its associated coils in the bottom and the receiver section in the top.

[giantkiller]

Hi all,
Let me post this based on the pix (very good!) and the posts (most excellant!).
The cutaway shows 2 loop structures, 3 turns apiece(8 gauge audio, bifilar?), 1 above and 1 at bottom. A poster posted the coil going around the outside where the load is connect to. And the parts pattern is a pair of caps, and a pair of inductors on the center box. looks like maybe 2 oscillators? Do i see a resistor on top of the cap?
Just dreaming...

--giantkiller.

[Grumpy]

The "transformer / Choke / toroidal wound elements" would behave as a High pass RC filter with a short time constant - a differentiator.  So, with a square signal in - you get pulses out.  Solid state Tesla coil builders use this idea.

Could also be part of a blocking oscillator (with positive feedback) like they do with vacuum tubes, but then you would have a sine wave and not pulse coming out.

Whichever, nice potting job in the center.

Oh, it's understood that one hell of a field exist in the center of the TPU if you recall SM's comments and the letters that were posted.

Not knocking the choke or any other ideas - just thinking out loud.

With the data at hand, your time would be better unitlized if you took the fledgling theory, decided a course of action, and start building.