Tesla's Magnifying Transmitter "Replications"

[dR-Green]

Hi Farmhand. I like your idea to cut a straight piece of pipe, I've had trouble with that myself. I'm not attempting the things discussed in this thread at the moment but having recently built a Tesla coil I thought I'd share how I did it in case something might solve a problem or give ideas to someone out there. The coil I've made is on a smaller scale than this, using 2" diameter PVC downpipe. For the topload toroid I used 2" diameter pipe insulation (that grey foam stuff), cut V shaped notches out of it with a knife to be able to fold it into a toroid small enough to fit the 2" diameter secondary, held it together with some duct tape and then taped it up real good with aluminium foil tape. Each piece of which conveniently NOT being insulated from every other piece, so job done there. I was foreseeing problems as one might imagine

For a backup topload I grabbed a couple of plastic toilet cistern floats

On the top and bottom of the PVC pipe, as a stand basically, I used what's called a boss connect or boss adapter, looks similar to this

http://www.allplumbingsupplies.co.uk/images/uploads/thumbs/thumb_2s402_img.jpg

The ones I have have a small notch on one side, so I made a hole in a piece of 18mm thick MDF, cut a small notch in it with a hacksaw, and place the boss connect down into the hole. There is a rubber seal inside the boss connect, so when you put the pipe the secondary is wound on into it it's held in place tightly. The 18mm thickness of the MDF and the correct sized hole is enough to support the coil. Another boss connect goes on the top of the pipe, and the pipe insulation toroid along with a thick layer of tape fits tightly onto it.

I haven't decided how to finish it off yet but my temporary solution is I've scraped the insulation off the end of the secondary wire, held it on the boss connect and then push the toroid down over it to make the connection.

I'll take some pictures and post them soon to make it all a bit easier to understand.

[Farmhand]

Hi Guys, I'll link a few building picture's here for those who may be putting together some setups, I just joined some drainge tube and discovered a trick so I'll put any construction picture's here and edit more in later maybe.

I use quick and practical methods that do not require special tools wherever possible.

First the simplest way I've found to get a straight square line around a pipe or cylinder is to use a square piece of paper or similar, wrap it around the pipe and line up the edges while it is all tightly wrapped if the paper is square or rectangle the end makes a perfecly square "level" line around the pipe, just draw around it, this is helpfull for cutting the pipe and for marking start and end points and whatnot.

Like this.

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=4&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211247&sc=photos

Here's the coil winding video links.
Part 1
YouTube - ‪AlternateFarmhand1's Channel‬‏

Part 2
YouTube - ‪AlternateFarmhand1's Channel‬‏

For the toroid terminal so far I just use slotted drainage pipe, I found if I cut the end down to the first slot on both ends I can fit them one inside the other by squasing one in and cliping the lip of one into the groove of the other.

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=4&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211293&sc=photos

Makes a good join.

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=4&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211295&sc=photos

I just taped the joins for now

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=4&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211296&sc=photos

These ended up rough with not a smooth surface I need better materials. But adding the second torus to the terminal decreases the resonant frequency about 50 Khz to 442 Khz it was about 492 khz so maybe I can work out the capacity from that roughly using the coil design app.

Increased capacity terminal.

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=1&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211297&sc=photos

[lamare]

Awesome Lamare, thanks for digging that up.

Watching the video I can see Don is simply paging through his notebook of transparencies, showing some, and talking about them. It's too bad he does not cite his source for the ring up waveform diagrams.

He does include (at least) two lists of references in the material at free-energy-info, and he also mentions d'Arsonval:

http://www.free-energy-info.co.uk/DonSmith.html

http://www.tuks.nl/pdf/Reference_Material/Donald_L_Smith/Don_Smith.pdf

D'Arsonval, Professor of Experimental Medicine at the College of France, invented the electrocardiograph, oscilloscope, amp and volt meters, thermography and numerous other medical applications of high frequency electricity. As early as 1860, he was building high frequency coil systems, which he used in his experimental work. There is a strong connection between the work of Tesla and the people mentioned above.

Additional Reading:
Electricity and Magnetism by B.I. Bleany and B. Bleany Oxford University Press 1991 ISBN. 0-19-851172-8

Engineering Electromagnetics by W. H. Hayt. Jr. McGraw-Hill 1989 ISBN. 0-07-027406-1

Energy Methods in Electromagnetism by P. Hammond Oxford University Press 1986 ISBN. 0-19-859368-6

Energy in Electromagnetism by H. G. Booker Institution of Electrical Engineers by Peter Peregrinus Ltd. 1982 ISBN 0-900040-59-1

The American Radio Relay League Handbook for 1992 and 1993. 69th and 70th editions. Published by The American Radio Relay League. (For V.A.R. information) ISBN. 0-87259-169-7

Electron Paramagnetic Resonance, Techniques & Applications by R. S. Alger, U. S. Naval Radiological Defence Laboratory, San Francisco, California. Pub. Interscience Lib. Congress #67-20255

Geomagnetic Diagnosis of the Magnetosphere by A. Nishida, University of Tokyo 1978 Pub: Springer-Verlag ISBN. 0-387-08297-2

Energy and The Missing Resource by I. Dostrovsky. Pub: Cambridge University Press 1988 ISBN. 0-521-26592-4

High Voltage Measurement Techniques By A. Schwab, M.I.T.. 1971 I S.B.N. 0-262-19096

Environmental Magnetism by R. Thompson & F. Oldfield Pub: Allen & Unwin, London 1986 ISBN. 0-04-538003-1

Geo-electromagnetic Investigation of the Earth's Crust and Mantle. Translated from Russian, By I. I. Rokityansky. Institute of Geophysics, Kiev, U.S.S R. Pub: Springer-Verlag 1082. ISBN. 3-540-10630-8

Electron Paramagnetic Resonance of Transition Ions by A. Abragam and B. Bleaney Dover Publications, New York, N.Y. 1986

The Electromagnetic Field by A. Shadowitz, Dover Publications, New York, N.Y.

Geomagnetism, Several Volumes, Pub. Periodically by J.A. Jacobs, Institute of Earth Studies, Dyfed, U.K. Pub: Academic Press 1989-1990's.

Geomagnetism by S. Chapman and J. Bartels, 3 Volumes Oxford University Press, 1940

Physics of Geomagnetic Phenomena, Several Volumes by S. Matsu****a and W. H. Campbell National Center for Atmospheric Research, Boulder, Colorado Library of Congress #67-23168 Pub: Academic Press, 1967

Physics Problems and How to Solve Them by C. E. Bennett, Professor Emeritus of Physics. University of Main (Particularly the sections on Electricity and Magnetism, and Units of Measure). Pub: Harper & Row ISBN. 0-06-460203-6

Units and Standards for Electromagnetics By P. Vigoureux, National Physical Laboratory Pub: Springer-Verlag 1071 ISBN. 0-387-91077-8

Surveyor's Guide to Electromagnetic Distance Measurement. Edited by J. J. Saastamoinen, Canada Pub: University of Toronto Press

Electromagnetic Distance Measurement by C. D. Burnside Pub: Granada, London 1971 ISBN. 0-258-96793-5

Der Magnetische Kreis "The Magnetic Circuit" By Von Heinz Rieger of Siemens AG. 1970 Berlin and Munchen, Germany I.S.B.N. 3-8009-4719 6

Electronic Modelling of Power Electronic Converters by J. A Ferreira Pub: Kluwer Academic 1989 33 AH Dordrecht, The Netherlands I.S.B.N. 0-7923-9034-2

Reading List
1. Alston, L.L. ( Ed.), 1968, High-Voltage Technology, Oxford Univ. Press, London
2. Beck, E. 1954, Lightning Protection for Electric Systems, McGraw-Hill, N Y.
3. Bowdler, GAV. 1973, Measurements in High-voltage Test Circuits Pergamom, Oxford. L C. 72-86488
4. Brewley, L.V., 1951, Traveling Waves in Transmission Lines Pub: John Wiley. N.Y.
5. Chapman, S. and Barteis, J . 1940, Geomagnetism, two volumes, 1,000 plus pages, Oxford at the Clarendon press, England
6. Craggs. J.D. and Meek, J.M. 1954, High-Voltage laboratory Technique., Butterworth, London
7. EHV Transmission Line Reference Book, 1968 Edison Elcctric Institute, N.Y.
8. Farno, R.M., Chu. L.J., and Adler, R.B., 1968, Electromagnetic Fields, Energy and Forces, Pub: M.I.T Press, Cambridge, Mass.
9. Feinberg, R. (Ed. ) 1979, Modern Power Transformer Practice, McMillan. London
10. Frungel, F., High Speed Pulse Technology, Vols 1 and 2, Pub: Academic Press. 1965, N.Y., and London
11. Gallagher, T.J. and Pearmain, AJ. 1983, ISBN 0-471-90096-6 High Voltage Measurement and Design, John Wiley, N.Y.
12. Hague, B., Alternating-Current Bridge Methods, 5 th. ed. Pub: Sir lsaac Pitman and Sons, 1959, London.
13. Hawley, W.G. 1959, Impulse-voltage Testing, Chapman and Hill, London.
14. Hayashi, Ch., Non-linear Oscillations in Physical Systems, Pub: McGraw-Hill, 1964. N.Y.
15. Henny, K. 1933-1959, Editor-in-Chief, Radio Engineering Handbook, five different copyrights, L.C. 58-11174, McGraw-Hill. N.Y.
16. Hudlestone, R.H. and Leonard, S.L., Plasma Diagnostics Techniques, Pub: Academic Press. N.Y.
17. Jacobs, J A., Editor, Geomagnetism, ( a massive work ) 3 large volumes, Pub: Academic Press, London.
18. Jeans, J.H. 1925, The Mathematics of Electricity and Magnetism, 5 th. Ed., Cambridge University Press,
19. Jones, B. 1972, New Approaches to the Design and Economics of EHV Transmission Plant, Pergamom, London.
20. Kind, D. 1978, An Introduction to High-voltage Experimental Technique, Viewieg, Braunschweig ISBN 3-528-08383-2
21. Knoepfel. H. 1970. Pulsed High Magnetic Fields, North-Holland, Amsterdam.
22. Kreuger, F H. 1964, Discharge Detection in High-Voltage Equipment, Temple Press, Heywood, London.
23. Kuffel, E. and Zacngl. W S. 1984, High-Voltage Engineering, Pergamom, London. ISBN 0-08-024213-8
24. Kupfmuller, K. 1957, Introduction to the Scientific Basis of Electrical Engineering, Pub Spinger. Berlin.
25. Lemon. H.B. and Ference, M. Jr., Analytical Experimental Physics " a major work" from The Ryerson Physical Laboratory at the University of Chicago, numerous copyrights 1933-1944. Printed as a text book by the University of Chicago Press
26. Lewis, I.A.D., and Well, F.H., Milli-microsecond Pulse Techniques Pub: Pergamom Press, N.Y. and London.
27. Malan, D.J. 1963, Physics of Lightning, English University Press, London.
28. Martin, T.L Jr., Physical Basis for Electrical Engineering, Prentice-Hall, N.J.
29. Matsusta, S. and Campbell, W.H . 1967 Physics of Geomagnetic Phenomena, Massive work in two volumes of 700 pages each. Academic Press, London.
30. National Physical laboratory, 1956, Notes on Applied Science ii 17, High Voltage Impulse Testing. HMSO.
31. Rather, H.. 1961, The Electron Avalanche and it's Generation, Pub: Vo. 33, Springer, Berlin.
32. Rokityansky, I.I., 1982. Geo-electromagnetic Investigation of the Earth's Crust and Mantle, Pub: Springer-Verlag, Berlin.
33. Salge, J., Pcier, D , Brilka, R., Schneider, D„ 1970, Applications of Inductive Energy Storage for the Production of Intense Magnetic Fields, Pub: Procedure of 6 th. Symp. on Fusion Technology, Aachen
34. Schulz, E.H., Anderson, L.T., and Leger, R.M., Experiments in Electronics and Communication Engineering, Copyrights, various, from 1943 thru 1954 LC 55-5033 Harper and Brothers, N.Y.
35. Schwab, AJ 1972, High-Voltage Measurement Techniques, The M I T. Press, Cambridge. Mass., ISBN 0262-19096-6
36. Sevin, L., 1965, Field Effect Transistors, McGraw-Hill, London.
37. Silsbee, F.B., 1942, Static Electricity, U.S. Department of Commerce, Washington. DC, U.S. Government Printing Office, (N.B.S. Circular C 438)
38. Smith, A. A., 1977, Coupling of External Electromagnetic Fields to Transmission Lines, ISBN 0-471-01995-X
39. Terman. F.E., Electronics and Radio Engineering, 4 th. ed., Copyrights 1932, 1937, 1947 and 1955 LC 55-6174 McGraw-Hill Book Co., N.Y
40. Thomas, R.T.,1970 High-Impulse Current and Voltage Measurement, Trans. I.E.E.E. EV1-19, pages 102-107
41. Thompson, Professor W, (titled Lord Kelvin ) Reprint of Papers or. Electrostatics and Magnetism (original 1872) London.
42. Traister, R., 1983, The Experimenter's Guide to Solid State Diodes, Prentice-Hall, Inc. ISBN 0-13-295444
43. Valley, G.E, and Wallman. II . 1948, Vacuum Tube Amplifiers, McGraw-Hill, N.Y.
44. Weedy, B.M. 1980, Underground Transmission of Electrical Power, Wiley, London,
45. Weeks, W L. 1981, Transmission and Distribution of Electrical Energy, Harper and Row, N.Y.
46. Winch, R_P. Electricity and Magnetism ( several printings ) Composed in Copenhagen, Denmark, Prentice-Hall Physics Series
47. Zijlstra, H., 1957, Experimental Methods in Magnetism, two volumes, the North-Holland Publishing Co.. Amsterdam.

The ARRL Handbook can be found here:
Index of /manuals_schematics

http://ki6yfq.com/manuals_schematics/amateur_radio_handbook_1959.pdf

http://www.ki6yfq.com/manuals_schematics/ARRL_2009_Handbook_Issue_86/intro.pdf

This Version 13.0 of the ARRL Handbook CD-ROM contains the complete text, drawings and photos of the printed 2009 ARRL Handbook. In addition, it contains "template" packages that contain additional information such as printed-circuit board layout drawings, parts lists and expanded treatment of some subjects. Also included is companion DOS/Windows software.

Figure 10.4 at page 4 of this pdf shows the same kind of picture:

http://www.ki6yfq.com/manuals_schematics/ARRL_2009_Handbook_Issue_86/10.pdf

[Farmhand]

If you had a two-channel scope it would be a lot easier to see what is going on because you could display the primary impulse driver waveform time-synchronized with the secondary sine wave. When I have some space and time I will make a short video to show you what I am talking about.

Yes that would be nice.
Check out this video. Looks like a decent setup and his frequency readings are interesting for the size of the coil. Notice the out of phase events he can get including one just out of phase. He talks quietly so turn up the volume.
YouTube - ‪Don Smith Tune1 - http://www.overunityresearch.com/index.php?topic=25.0‬‏

Thanks everybody for the input, every bit helps. I seem to be going around and around in circles today not acheiving anything. I hope to make some more terminals tonight and maybe a primary and also the variable inductor for the receiver.

If I can stop reading and watching video's that is.

Cheers

[7imix]

OK i was just sweeping the receiver coil again from a lower frequency and noticed a resonable sinewave appear at about 162 Khz which is a bit less than a third of the resonant frequency. Interesting.

https://skydrive.live.com/?cid=32a91...1290&sc=photos

If you had a two-channel scope it would be a lot easier to see what is going on because you could display the primary impulse driver waveform time-synchronized with the secondary sine wave. When I have some space and time I will make a short video to show you what I am talking about.

[7imix]

Awesome Lamare, thanks for digging that up.

Watching the video I can see Don is simply paging through his notebook of transparencies, showing some, and talking about them. It's too bad he does not cite his source for the ring up waveform diagrams.

[lamare]

Here is information about the book, although there is no PDF available

I do have Don's stuff in my archive:
Directory contents of /pdf/Reference_Material/Donald_L_Smith/

Update: the book by 'd Arseval is also mentioned in the thread on Don Smith:

http://www.energeticforum.com/renewable-energy/4960-donald-l-smith-15.html#post99055

And more on this book including a (working) link with some of the pages also over there:

Hi guys,
Finally got some pages of the book with my camera.
The all book is the story of his life, not much about Tesla.
Just a few pages presenting an improvement of Tesla's high frequency circuit.
Improvement for security and stability of the effects. from page 248.
D'Arsonval was a doctor and he developed and improved Tesla's high frequency circuit for medical purpose.
There is nowhere mention of producing electricity. All his devices were plugged to the wall or running from batteries.
But the author of the book might have hidden many details and comments. In 1934, date of publication of this book, Tesla had been suppressed already ...
The author doesn't seem to know very well Tesla, because in two places he says that Tesla was from Austria !

The raw 52Mo zip file is here: http://tesla3.com/images/forum/_D-Ar...2Megapixel.zip

Feel free to enhance the pictures or to make a smaller pdf file.
If you know of very interesting old books to buy from internet, please let me know. For the benefit of all.

This picture is NOT in this book:

[7imix]

Here is the part of the video I am referring to

YouTube - ‪Donald L. Smith 1996 Tesla Symposium Part 8‬‏

Here is information about the book, although there is no PDF available

D'Arsonval; soixante-cinq ans à ... - Google Books

Here are the relevant stills from the video

[7imix]

For some reason I can't edit my last post. It's D'Arsonval.

http://en.wikipedia.org/wiki/Jacques-Arsène_d'Arsonval

[7imix]

OK i was just sweeping the receiver coil again from a lower frequency and noticed a resonable sinewave appear at about 162 Khz which is a bit less than a third of the resonant frequency. Interesting.

https://skydrive.live.com/?cid=32a91...1290&sc=photos

Yup, that's a lower harmonic. A very efficient setup might have the driver pulsing at a lower harmonic than the coil, but due to the inductance, capacitance, and resistance being tuned properly, the energy in the secondary will not diminish greatly before the next impulse from the driver, and thus the coil will "ring up" and display a waveform that is like a normal damping oscillation but with the amplitude increasing over time instead of decreasing. Don Smith showed a graph of one of these waveforms in one of his presentations where he was talking about the book by de'arsonval. Unfortunately I think at book is only in French and haven't been able to find a PDF.

[Farmhand]

OK i was just sweeping the receiver coil again from a lower frequency and noticed a resonable sinewave appear at about 162 Khz which is a bit less than a third of the resonant frequency. Interesting.

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=1&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211290&sc=photos

[Farmhand]

Hi wizofid, Glad to hear it. Welcome

I just tested the other secondary coil and it seems to be a little bit different it's resonant at 485 Khz so I need a little adjustment on that coil too and try to get them as close as possible to each other.

Receiver frequency

https://skydrive.live.com/?cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211284&sc=photos#cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211289&sc=photos

I just got a strange result from the primary with the Function generator, I think it shows the cap charge and the coil waveform, I realise now I shouldn't have had the scope across the cap too maybe, just the coil. Oh well i'll try again tomorrow.

This is the transmitter 5 turn primary with the cap and charging inductor included but the schematic would be slightly different to the one on the page I linked above, my capacitor is across the coil not in series with it but my charging inductor is in series with it, maybe an unusual arrangement.

https://skydrive.live.com/?cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211284&sc=photos#cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211287&sc=photos

So I measured another 17 turn primary with no cap just the coil, also another thing is I measured the 5 turn primary still arranged with the secondary, but the 17 turn one I measured by itself.

https://skydrive.live.com/?cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211284&sc=photos#cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211288&sc=photos

Anyway I think I need to do something better with the primary and receiver output coils, I might need to wind one specially tapped and use it to determine an appropriate turn count, then preciscion tap a final pair. I should try some different wire size. and spacing, height and stuff just incase i'm a few millimeters coupling out or something in diameter difference between primary and secondary former I mean, I think I must surely be too close or too far.

I'm going to make a second set of toroid terminals aswell a bit larger so I can add them or use them instead.

Much to do.

Cheers

[wizofid]

Reading along and building too. Thanks!

[Farmhand]

Hi all, I've worked out the function generator. and determined the resonant frequency of the secondary of the transmitter coil. Looks like about 492Khz which is about what I thought it was I said in the first post 508Khz measured by the DMM, that is the only frequency I get a sine wave or anything really it just all of a sudden appears the bandwidth or frequency range is very narrow. But with the scope set on 10x and the Function generator amplitude at max the sine wave is as the shots show.

I connected the function generator and set the scope as shown on the page in the link below but the scope probe was hung only 2 feet from the toroid no streamer string.
Oscilloscope Tuning a Tesla Coil for Resonance

The coil shows a sine wave from any of the three input signal type's square, sine, and triangle, square looks best.

Square wave input

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=3&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211284&sc=photos

Triangle

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=3&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211285&sc=photos

Sine

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=3&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211286&sc=photos

The input signal type is indicated on the FG.

Being that i get confused easily I thought I would post those first then test the primary.

Cheers

[MonsieurM]

Do you have a name brand, or ref number, if so you could look up the manual in the manufacturer's website or just google it