HIGH QUALITY TPU DVD Video Released from Jack Durban

[otto]

Hello all,

sorry, double post.

Otto

[MACEDONIA CD]

HI 

[BEP]

There are other pictures of the MTPU that show the center item. Hope this information helps.

Just my 2 cents:

I'm almost 100% sure the item shown in the center is the coronal discharge cover of a clean-room workbench air ionizer head.
Other models had single or dual coronal discharge covers. The ones I've pulled from the company junk pile had remote heads but interesting settings of 1.3Hz (for the 6 head setup) up to 35.7kHz for the single head (local workbench only).

The duals alternate positive and negative charge to equalize static charge of the area and prevent dust buildup on the ionizer.

This is probably something the speaker lab had mounted at most work benches.

If nothing else it certainly fits my train of thought.

[aleks]

That picture IS a speaker magnet complete with centre pole. Grab a few old speakers and pry then apart.
those two lumps are rivets that would attach to the speaker frame.

The only problem is I do not see a magnet there - it looks more like speaker driver, without magnet. But then again - speaker drivers can be used as microphones without the need of adding anything extra.

[wattsup]

@JustRite

Thanks for that good photo, but that center piece is his speaker magnet he used to start the MTPU. In this case he actually leaves it on the black box and we do not see a center toroid. When the light bulbs are lit, he takes the magnet in his hands to show the light intensity is going down.

Keep looking and let us know if you see anything else.

@all

While I was looking at the MTPU,  I also looked at the LTPU center toroids again and have realized something that is a bit confusing between it and the FTPU toroid or it is an illusional effect of the video quality.

In the first image ftpu-toroid-wind1.jpg show the toroid and you can see the left coil start defined with four turns then it just bundles. You can also see it on the right side how the wires seem to be very fine, but is this from the camera angle and quality making wind counting impossible.

In the second image Ltpu-toroid-wind1.jpg you can see the winds are well defined on the front but you can also see the bundle "effect" in the background winds. This same bundle effect as the FTPU toroid indicates to me that both FTPU and LTPU toroids are the same and it is only the quality of the images that is creating the illusion of fine wire windings.

In the third image Ltpu-toroid-wind2.jpg is a better Ltpu toroid image that shows well defined winds, We can clearly count 32 turns and the wire gauge anywhere from 16 - 20 AWG. Hard to say which. I would say 18 awg.

My present magoid has approx 144 turns of 29 awg so I will have to change it. Also this new wind scheme to better reflect the FTPU and LTPU toroids will require that I rewind the ferrite and iron powder cores also to do some more testing.

This also means the toroid not having finer wire may be less conducive to reacting to a frequency and hence may cancel the microphone/feedback theory.

More to come.......