TPU - General Discussion

[Grumpy]

...because at the top of the thread he refers to ultra sound.

Longitudinal waves propagate like sound waves.

[ronotte]

Hi all,

@Whatsup

THANKS for the Litz link...really a lot of  goodies....I'm really happy.......I'll need to read it deeply and use it on line.

@Duff

1 - in my case I did 2 tests one with a 20mt Litz coil and one using a 500mt thin enameled wire coil. In both case the magnet (NEO) were sliding on top or coil bottom. If I operate the coil side I obtain very small effect. Of course is normal that if you take your heavily coiled bobbin in your hand (or slide your hand very near) it will do like an antenna...capturing mainly your body leakage 50 Hz. In my case I always stayed far from the coil and the background noise were about 20 millivolt in relation to 400 - 500millivolt due to mag swinging over the coil top.
NOTE: if I move the coil only  -->  NO EFFECT.
2 - it's funny you did not had a very good reaction with your high speed gtest (it is not that in the open TPU the grey side thingh is just a small DC motor?). I'll chek it as well but in an easier way: just how told by MACEDONIA CD. I'll report on this.

@Grumpy

OK about your suggestion to put the kick coil all over the ring: in my case it will be lumped in 3 spaces as other places are already fitted with 3 control coils. I do confirm that bandwidth for the small test prototype is from 30 KHz into megahertz range.
One point to note is that the output voltage is strictly following the magnet sliding on top of the test coil, so it's NOT A KICK but just a small DC amplitude variation with the time. With such an fdo I wonder if it can be useful to induce anything on exixting 90 degree collector wire!
SO HOW TO EASILY TRANSFORM A SLOW DC VARIATION INTO A KICK USEFUL FOR OUR PURPOSES?

@MACEDONIA CD,

The last question is also for you as it seems that you know it better: to summarize we do need a kick coil excited by the relatively slow hand sliding of a magnet and able to deliver at least one fast kick that in turn would be multiplicated by the induction into our existing Control coils.  As you have seen I did some tests on single wire and high coiled bobbins...but always using hand linear magnet sliding. OK i'll try next with hand movement of magnet around the wire...I'm just going to do it and I'll report the difference.  Anyway , doing by hand I'll have still slow DC voltage NOT KICKs....so the problem will be still opened.

Roberto

[ronotte]

Hi all,

@MACEDONIA CD

as previously said I just did the following test:

1 - I took a piece of 15 cm of Litz wire (40 threads) then kept it stright on two rigid supports and put scope probe in derivation.
2 - Set scope sensibility to 20 millivolt/div and slided by hand horizonthally  and then vertically my  1x4 x .5 cm my NEO magnet bar. RESULT = 10 mV noise steady - no activity indication on scope. Clearly the wire lenght is too short and unable to catch also the strong mag field coming in either way from the NEO magnet.
3- tried the same but revolving by hand the NEO around the wire: same result - nothing.

MACEDONIA:

"TOANDERSTEND MY ONLY YOU NEED SMALL PIECES OF WIRE ABOUT 5 cm THEN YOU MOVE PERM,MAG  HORISONTAL THHEN VERTICAL OR AROUND  YOU WHILL SEE THE DIFERENTS VOLTAGE  YOU MOST MOVE THE MAGNET WHIT THE SAME SPEED TO SEE THE DIFERENT BEATVEANE THIS 2 DIFERENTS MOVING OF MAGNET"     

Why do you claim such kind of results?.....we have not time to loose. If you are on something please document it full like I do! I'll be first to congratulate. I'm much interested in obtaining KICKS : NOT SLOW DC VOLTAGE SWING.

@ all

I tried to put my NEO in my hand driller chuck and run it slow near the top of my 20 mt Litz lumped  KICK COIL: OK I've a very good sinusoid of about 0.5 V ptp (about 1 V or more using a bigger NEO). So if this's the way (open TPU perhaps uses a small DC motor to do the trick) how do you suggest to transform it in kicks without use of any electronics? (I tried to resonate the output but  for the moment no results....)

Roberto

[wattsup]

@Roberto

Good to see you like the links. I will put up some more on that same post. I just put another link showing Litz wire AWG versus frequency range.

For tests like MAC's, remember if the wire strands are in parallel this will increase amperage, if it is in series, this will increase voltage. So you may  be seeing low voltage but the amperage should be higher.

Looking at the video, I would take a guess to say the coil wire Litz is 16 AWG and according to the table for 6000 hertz (1khz-10khz range), it would be a 26 strands of 30 AWG wire.

Now the problem here is it could also be a 14 AWG which would make 42 strands at 30 AWG. I will look at this further to see if I can pick up any visuals for a better size comparison, etc.

One other major thing I have observed on the Coil #2, I think I am seeing a round magnet or a ferrit core or something else round that is taped on the outer side of the coil. I am putting two photo close-ups, one regular photo and one with britness adjusted to show this and maybe others can  get a better idea on what this may be. I am sure it is not the natural curvature of wound coil wires.

Sorry if I am putting these observations one after the other, but this video is really short and crappy and you have to spend alot of time looking and looking to see the small nuances.

So there could be one magnet on the side of the coil and another placed manually on top. Maybe the shifting action between of both fields is creating a field movement. Also, there could be another magnet on the inner side of the coil.

I am going to my favorite electronics  place to see if they have Litz so I can do some testing myself on this question. Not everyone sells Litz wire. I have seen some on ebay. When I saw this item I was thinking of Otto for this ECD rings.

http://cgi.ebay.ca/Litz-wire-175-46-coils-Loop-antennas-crystal-sets-100_W0QQitemZ300160862204QQihZ020QQcategoryZ26213QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[MACEDONIA CD]

HI 
i realy dont anderstend me in the england languege  if you able to make anderstend in my languege  i whill tell in my languege is easy way   , i read some reply of otto  is raid  way i have more ideas and more things  to make a road clears to make a move to this way  listen i now whill say in the macedonian lang..
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