HIGH QUALITY TPU DVD Video Released from Jack Durban

[slapper]

There's that bugger. I can see it clearly now. Thanks for shedding the light.

10:08


Another common part - advanced a couple more frames:



compared to the FTPU:

3:43


I'm thinking this is an aluminum can electrolytic capacitor. I think I see the radial leads fanned out and bent back on the cap in the OTPU image.

Take care.

nap

[wattsup]

@slapper

Good shots. Thanks. A second confirmation on the OPTU toroid was important.

@Mannix

I have been searching off and on for the toroid and no luck yet. I have even invited toroid manufacturers to come to the forum and try to help us identify the toroid, but none have responded thus far. So I continue inviting others.

I have posted a photo of some of the toroids I have on hand.

The big green toroid core is what I found when I removed the coils from an existing standard AC/AC toroid. This one is a rolled laminated strip type.

The two others are ferrites.

Notice the difference in the sharp edge of the green one compared to the rounded edges of the others. This is identical to the TPU toroid and pushes me to conclude that the toroid is a laminated rolled strip core. I cannot find any core with pre-made holes drilled from top to bottom as I can see in the FTPU toroid. I will try to drill some holes in the big green toroid to see if it is possible or not without breaking the toroid. I have tried drilling a pretty large ferrite core but it broke. lol

If any of you are curious how toroids are wound, here is a link with some nice short videos. When the first video is finished, just click on the Next Video button to see more.
http://www.gormanmachine.com/videos/proii/proii.htm

[Peterae]

Wattsup

I have also concluded that the torroid used in the tpu's are laminated iron core, you are correct in saying it is the sharp edge that gives it away, these are used in most torroid transformers for audio psu's and come in loads of different sizes.

Peter

[wattsup]

The green toroid above is very close to the dimension of the TPU toroids. When I took the original primary and secondary coils off of this toroid, there was alot of wire involved, layers and layers fully wound.

So if the TPU toroid is about the same dimensions, why does it only have one layer of thin wire wound as the two halves. What type of action would you expect from so few winds on such a bulky toroid. Also, for a TPU toroid, what are the attributes one should look for. High or low inductance. A highly inductive toroid  most probably since there are so few turns, you would want to use the toroid as a secondary energy storage device.

One more thing about the toroid and the "kick".

I have read that toroidal transformers once saturated hold their energy for a longer time then regular transformers. Also, while the toroid is still saturated, if power is turned off, then on, you will have what is called "in-rush" current. This only happens when the toroid is already energized. So maybe this is the kick since we now know all the TPUs have a toroid. lol

Also this holding of energy may explain why the power goes down gradually when the magnet is removed.

[Peterae]

dont destroy your torroids by drilling there are no holes in it, if you are refering to the hole in the disk underneath this is not a torroid only an rf shield, the top torroid does not actually go into the steel wire spool it sits on top and is screened on the bottom by an iron plate which also has 3 vertical clips which extend futher beyound its perimeter and are partially buried in the black potting compound these can clealry been seen in the LTPU and the FTPU.
It would appear the inner wire spool has been quiet well screened from rf, which doesnt surprise me because the chips he would have used for phase locking his 2 signal generators would be very sensitive to spurious noise.
At this point in time i would say he is using the torroid to generate sharp high voltage pulses, but i feel he is mixing 2 seperate frequencys in this torroid ready to drive the control coils, i am guessing at the moment that feedback is done by a 10 turn air coil which seems to be criticly positioned inbetween the output two control quadrants, i have seen this configuration on the FTPU and the OTPU.

I feel some of you guys in the know should try to sort the resonance traces using the sampled sound from the video this may be quiet important as the data produced can be trusted.

Cheers
Peter
Something i will also add is i beleive there to be only 1 collector in the FTPU, a collector has two halfs, the first being a coiled wire close to the control coils, the second half is a iron cored coil, in the ftpu the iron cored inductor is located inside the spool at the bottom, the iron core can be seen underneath dead center, the wires from this pass throught the center of the top torroid to mingle with the control quadrant coils.
The Otpu has two collectors, you can see the iron core in 1 of the feet, to find the second part of the collector you need to follow the white wires.
Notice that in the 7 inch tpu there are 3 wires to the switch, the red wires are control wires and the white collector wires, this is also so in the Otpu.