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Author Topic: Steven Marks Tube Power Supply  (Read 34957 times)

BEP

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Re: Steven Marks Tube Power Supply
« Reply #60 on: May 09, 2009, 02:33:05 AM »
@BEP

Sorry, I should clarify - - I, as well believe, that your input is highly valued. I didnt mean to discount any of what you just said or imply that it was a conflicting perspective. In fact, it looks like youre right on the mark with your explanation of SM's rectifier story...
Your statements/questions are fine. I understood none as negative.

What you said about learning is always a plus is completely true. I do have some experience in most of this but the TPU trial is certainly a learning experience for anyone.

If they don't think they will learn something new they are already lost.


BEP

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Re: Steven Marks Tube Power Supply
« Reply #61 on: May 09, 2009, 02:53:08 AM »
   There seems to be many perspectives. I also have one. I can account for most of the statements made by Steven. Just wind a lamp cord coil and then figure out how much cap to add to it to make resonant at say 5500cps. Easy to obtain with the coil form given.
Standard cap values and then trim the coil to fit. Sound familiar?

thaelin

How big would your coil be if the caps are only there as power smoothing for the multivibrator circuit?

And if there was no conventional core to increase the inductance?

Or if the 'core' is solely there for magnetostrictive (similar to a piezo effect) torsional movement? Of course, if the effect required is MS then the length of wire for the coil would only be important to the circuit driving it.

This IS only my perspective. It may or may not be correct.

BEP

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Re: Steven Marks Tube Power Supply
« Reply #62 on: May 09, 2009, 12:56:33 PM »
Something I realized some time ago:

The act of trimming/cutting a system element to 'tune' the device indicates that element is probably not part of an electric circuit, except:

1. That element is primarily a capacitive device
2. The element is 'open-ended' and does not carry conventional current.
3. The element is mechanical in nature, like a magnetostrictive core not being used as an electric current conductor

If I am correct I still don't believe my perception of this type of TPU is complete.

BTW:

If it is number three I can understand trimming the length after extended use because the core would expand with heat buildup. If initially tuned cold the tuning may begin to fail as the element heated.
« Last Edit: May 09, 2009, 01:16:35 PM by BEP »

Mannix

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Re: Steven Marks Tube Power Supply
« Reply #63 on: May 09, 2009, 02:50:18 PM »
Yes, I see where you are going.

That may infer  that inductance is not something useful here .

So perhaps low or canceled inductance... and high speed "whatevers" manipulated and/or originated by a rudimentary  device. The process tunes into background "else"

Now, to make it actually work?

Lindsay

otto

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Re: Steven Marks Tube Power Supply
« Reply #64 on: May 09, 2009, 03:08:21 PM »
Hello all,

WOOOOW BEP, as so often, you hit the nail.

Otto

BEP

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Re: Steven Marks Tube Power Supply
« Reply #65 on: May 09, 2009, 04:06:09 PM »
Hello all,

WOOOOW BEP, as so often, you hit the nail.

Otto

Yes, but as so often the nail is on my thumb!

It is not lighting lamps. It only sings weird sounds. Comparing the sounds to the soundtrack from all TPU videos mine are not even similar.

So, I am still lost  >:(

BEP

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Re: Steven Marks Tube Power Supply
« Reply #66 on: May 09, 2009, 08:33:08 PM »
That may infer  that inductance is not something useful here .

I'm sure inductance must be considered anywhere there is a coil. Where it would be most important is the inductive coupling between the moving core and the control coils on top of the complete overwrap coil around the MS cores (I do not consider this overwrap coil a control coil or the core a collector.)

In mine the overwrap is the magnetic return path, as found in MS actuators. The control coils go on top of that in segments.

Maybe this is why it just sings  ;D
 

pauldude000

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Re: Steven Marks Tube Power Supply
« Reply #67 on: May 10, 2009, 08:00:58 AM »
@BEP

How do you move air with a mag field, without it being ionized? (You would quickly notice that.)

The simple answer is that a mag field wouldn't.

Vibration would, but enough to make a TPU sing..... (You would EASILY notice vibration that strong.)

So, what is making your TPU sing?
 
Paul Andrulis

BEP

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Re: Steven Marks Tube Power Supply
« Reply #68 on: May 10, 2009, 02:51:21 PM »
@BEP

How do you move air with a mag field, without it being ionized? (You would quickly notice that.)

The simple answer is that a mag field wouldn't.

Vibration would, but enough to make a TPU sing..... (You would EASILY notice vibration that strong.)

So, what is making your TPU sing?
 
Paul Andrulis

I'm not moving air with a mag field. As you point out I'm moving air with vibration of the MS core.
The method is basically 'poor transformer core design', but intentional.

The noisy transformer effect is usually avoided by understanding ETR. I thought if I could produce the same sounds as the TPU videos I would be closer to a solution.

Specifically:
Two magnetostrictive-regenerative feedback oscillators connected back to back as a complete multivibrator circuit. The frequencies are determined by the core material not the coil windings. Caps are only used to couple the two circuits into a multivibrator.

There are two separate MS cores of bailing wire (re-annealed by me). Each is only two turns around the circumference.

The vibration of each is weakly audible and not in perfect tune with the other. So, it makes a bit of a wah-wah sound.
I liken it more to the UFO sounds in 50's Sci-Fi movies.

There. I did it. I dated myself  ;D

giantkiller

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Re: Steven Marks Tube Power Supply
« Reply #69 on: May 13, 2009, 05:38:20 AM »
I'm not moving air with a mag field. As you point out I'm moving air with vibration of the MS core.
The method is basically 'poor transformer core design', but intentional.

The noisy transformer effect is usually avoided by understanding ETR. I thought if I could produce the same sounds as the TPU videos I would be closer to a solution.

Specifically:
Two magnetostrictive-regenerative feedback oscillators connected back to back as a complete multivibrator circuit. The frequencies are determined by the core material not the coil windings. Caps are only used to couple the two circuits into a multivibrator.

There are two separate MS cores of bailing wire (re-annealed by me). Each is only two turns around the circumference.

The vibration of each is weakly audible and not in perfect tune with the other. So, it makes a bit of a wah-wah sound.
I liken it more to the UFO sounds in 50's Sci-Fi movies.

There. I did it. I dated myself  ;D

Put a football shaped neo mag on an inside edge. The mag field will treat the neo like speaker cone. Don't touch when it is vibrating.

--giantkiller.

BEP

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Re: Steven Marks Tube Power Supply
« Reply #70 on: May 13, 2009, 01:22:32 PM »
Put a football shaped neo mag on an inside edge. The mag field will treat the neo like speaker cone. Don't touch when it is vibrating.

--giantkiller.

Thanks for the suggestion. The construction of this one includes magnets already. At two points around the circumference (90 and 270) I have a two magnet set.

They are the same magnets shown on the open TPU. One above and one below. They are there to provide a static node in the torsion/stretch of the core using magnetostriction. They don't vibrate unless the multivibrator is off tune. When tuning is best the core vibrates and not the magnets.

Without the circuit the whole thing is the most poorly designed speaker in existence.

Fun to play the long version of "Innagoddadavida" but not much else. :D

Grumpy

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Re: Steven Marks Tube Power Supply
« Reply #71 on: May 13, 2009, 03:09:59 PM »
you can make something vibrate by constantly changing the electrical gradient around it