http://www.energeticforum.com/eric-d...ompendium.html

Yes, I have taken a look at this, but I believe some questions are not directly answered? I have an idea what the answers might be but also need some clarification....e.g. is hairpin circuit used as a primary? Also thesis question...Also a clear explanation of other points would be helpful, even though some are in the link supplied

Read Tesla

Hi Deco

I have built dozens of different Tesla coils, the only way you can complete your thesis is to build a few based on Eric Dollards descriptions.

Answers to your query.

1 - Either
2 - Mainly Secondary can also be Tertiary and a possible Primary in fractional wave lengths measured in harmonics of the fundamental and in Dollards notes
3 - Magnify the resonant rise, isolated from any inductive coupling and in Dollards notes
4 - Pulsing defines the frequency of the gate of charge, it actuates the Resonant activity in the main tank and in Dollards notes
5 - In Dollards Notes
6 - Basic high voltage switch
7 - Hairpin is a poor description, 1/2 turn Primary coil is correct.

I am not an Electrical Engineer and Eric's descriptions are very clear. You must sever your attachments to many comfortable notions that radio engineers have formulated before you can move in a direction that will give you a confident outcome and clear results based on Tesla and his descriptions of the Longitudinal wave.

Build according to Nikola Tesla and his patents and you will be assured of success, this is a simple as I can state, Eric's work is a great reference when you lose your way. Good luck, and please post your progress, Regards Arto.

Thank you for the reply! When you say eric's notes which notes are you referring to exactly? Natural frequency of earth or circuit (LC etc)

Why is hairpin a bad name? How does thay circuit work and why call it half turn?
Does it need to drive primary? For radiant effects im guessing DC pulse is needed...

Thank you clarification, very useful. I wonder what modern EE concepts I can study for reseatch..if anyone has any ideas let me know

As well, any specific references to steinmetz chapters or lectures would be useful too (not juSt title of book)

thank you once again....double checking my understanding to make it clear for myself

Read and Read

Hi Deco,

Hairpin is not a description it is a "incult". Every culture and historical period has different types and shapes of hairpins, a "nonplus" for word use, Tesla would be horrified by its use, he was well versed in a dozen languages and knew how to use the correct descriptive terminology.

It is scientifically accurate to call it a 1/2 turn primary coil, it is simple and no mistakes are created. A Coil implies a circular form(Tesla), 1/2 describes a semicircle, when you add the leadin and leadout you have a "U" shape, simple and not misleading(pun intended). Tesla also used square coils(and other shapes) so that is another possibility, which still gives you the "U" just with sharper corners, he did say that the flat spiral was the most useful and efficient geometry, the others are conical and cylindrical, where the cylinder type was the most utilitarian.

All activity in any circuit will have both a radiative percentage and a non radiative or local percentage. Tesla states quite clearly his oscillator(TMT) has a very low radiative component. If you are to build one you must design it so it does not emit radio waves, at least minimize any radiations. Do not confuse yourself when Tesla talks about radiant effects or matter (radio-activity) and when he talks about his TMT and longitudinal waves and its radiations(Hertz waves), they are different kettles of fish, both are about the Ether but are different in conceptual activity.

Remember all wave types can be and are used in a true Tesla Transformer, you will learn this from all of Erics notes. DC pulse is a favorite of modern electronics, it contains the complete spectrum of harmonics when injected into a LCR circuit where the resonant activity will become activated by its gating and it is very easy to implement. This was one of Tesla's favorite methods.

When I refer to "Dollards Notes", I am talking about ALL his books and writing, which includes ALL Steinmetz, ALL Tesla and ALL Heaviside, a good portion of Ruder Boscovic's output and a couple of volumes of Goethe, not to mention a hundred other references that Eric cites. Just read a book a day for 3 months, that should get you up to speed.

I hope this clarifies some terms, your next step is to Read, Read and Experiment, Build and Read, Write and Read.......

Regards Arto.

Have you done all that reading? How many people here can say they have...?

Deco -- for your thesis, maybe something on the transmission line / waveguide behavior of helical conductors?

Start with Dollard's theory of the TMT as a transmission line, go from there. In the main thread a while back someone posted a link to a study some ham radio experimenters did on waveguide effects in inductors suspended in space, for example.

Alternately consider studying the propagation of electricity through the dielectric. Artech House has some books on dielectric antennas that may provide a worthwhile "conventional EE" background:

BillingCountry | Artech House Books
Dielectric Resonator Antenna Handbook
Aldo Petosa


BillingCountry | Artech House Books
Solid Dielectric Horn Antennas
Carlos Salema, Carlos Fernandes, Rama Kant Jha

Build an experimental setup and do the basic tests and analysis as outlined in the other thread and you'll learn more than most people know of their "Tesla coils" within the first week. You can buy a signal generator off ebay from about £20 to get started.

So what would be a basic set-up? I am correct if I use RF generator, stepped up and put in Tesla 1/2 turn primary (two caps in series and shunt spark gap)....and use that to drive primary. Then, following specifications and dimensions, have secondary and maybe tertiary quarter wave resonance. Secondary hooked up to extra coil and then extra coil hooked up to capacitance. Also, same time I need to ground neutral of secondary and what else? If someone could patiently explain if that set up is correct or what is lacking. I'm not sure about the test set ups, not familiar with it...Thanks again

Take an RF generator / amplifier, (no spark gap is required) drive a primary coil of up to three turns (plus or minus), depending on said diameter inductance & therefore impedance. Use the appropriate tank capacitor in shunt for the given frequency. Primary coil + tank cap = tank circuit, driven by an RF generator at the Ro. The resonant frequency of which, being equal to the 'quarter wavelength' of the secondary coil. Work first with a single secondary coil as per Dollard’s specifications and a terminal capacitance. (Only add an extra coil when you have further experience). With the secondary coil alone, you can achieve a reflected displacement current or telluric current from the so-called neutral earth terminal. This is actually the output terminal. Eliminate any arcing from the terminal capacitance.

Other than that, refer to Eric’s notes, read through his thread, listen to what dR-Green advises and others that have also shown the working principal.

Good luck, [Welcome to the club].