Tesla's "COIL FOR ELECTRO-MAGNETS".

[conradelektro]

Conrad:

Perhaps the self-capacitance is so low that the self-resonant frequency is much higher than you were expecting?

MileHigh

@MileHigh:

The self resonance frequency of the bifilar coil (the two wires in series) is 4600 Hz (air core) which gives a self capacitance of 7 nF. How low could it be for one wire? Anyway I tried up to 20 Mhz (the limit of my function generator).

I will try to get resonance with capacitors (LC circuit) on Monday (10 µF, 1 µF and 0.22 µF) and also try for self resonance again. It can well be that I did something stupid, it was late.

The most puzzling thing is that it did not work with the wires in parallel? The two wires have different diameters, one is thinner than the other.

Greetings, Conrad

[Magluvin]

@MileHigh:

The self resonance frequency of the bifilar coil (the two wires in series) is 4600 Hz (air core) which gives a self capacitance of 7 nF. How low could it be for one wire? Anyway I tried up to 20 Mhz (the limit of my function generator).

I will try to get resonance with capacitors (LC circuit) on Monday (10 µF, 1 µF and 0.22 µF) and also try for self resonance again. It can well be that I did something stupid, it was late.

The most puzzling thing is that it did not work with the wires in parallel? The two wires have different diameters, one is thinner than the other.

Greetings, Conrad

In my earlier posts,  a 2 turn normal coil has the same capacitance as a 2 turn bifi.

Every time you add a turn to each coil, the effective capacitance of the normal coil will go down and the bifi will go up.    So the other coils you were testing had as many turns that would make the normal coil capacitance somewhat lower, and the bifi somewhat higher. When you get into a lot of turns, the spread gets wider.

The info I give is not just nonsensical ramblings.

Mags

[Magluvin]

If you do the test like he instructs, you'll get the correct results. A zinc or nickel or chome plated bolt won't magnetize like a soft iron nail. All you'll be left with is the coil's field strength like in Magluvin's test.

Actually, I used  non plated 16 penny nails. We have a guy doing construction at my work. I did do a thin wrap of teflon tape, as the ribbed burrs close to the head of the nail may have scraped the insulation of the wire. I believe for that test to be evident, the coils need many more wraps than described in the article, especially to use a D cell. The author of that site should make changes to that article. Its the right idea, just the wrong ingredients. Sure it may work 'better' with high voltage, but the article doesnt express that.

Mags

[MileHigh]

Conrad:

Assuming the frequency is too high, there is a way of making inferences about the self capacitance using different values of capacitor.   Perhaps if you start with a one nanofarad capacitor and measured the resonant frequency and worked your way back from there you would see a trend line in the frequency.  As you reduce the capacitance values what happens to the frequency?  Does it start to go much higher than you have seen in other similar tests?

Of course it's noted that the capacitance is always the self-capacitance plus the capacitor capacitance plus the probe capacitance.  I am not factoring in frequency effects here but we know they come into play when you are in high frequency territory.

The geometry is telling you that the capacitance has to decrease.  Now the distance between adjacent wires is very large because there is an unused wire between each active wire in the coil.  If you look up the formula for the capacitance between two plates of metal, you will find that it's inversely proportional to the distance between the plates.  So the difference in capacitance between two wires that are 0.1 mm apart vs 2 mm apart is very large.  It's possible that the self-capacitance is now so low that it's very hard to measure, and also very hard to observe any effects from it.

MileHigh

[gyulasun]

I place the critical minimum frequency for DLE (Delayed Lenz Effect) for a diametric magnet spinner at twenty five thousand RPM. I measured my spinner speed with a piece of reflective tape attached and a laser tachometer.  Itsu apparently lowered the CMF for DLE to a veritable 18,000 RPM with his resonant output coil. This amounts to an achievement, but I think Conradelektro will encounter slow down at 10,000 RPM.

I check my input with a digital ampmeter.

Synchro1:

Why do you attribute to Itsu things he obviously did not do?  He did not lower the CMF for DLE to 18,000 rpm with his resonant output coil! In his parallel resonance video the highest frequency from his generator coil output was 206 Hz (this is 12,360 rpm and this latter rpm  occured when he shorted the output), no any higher rpm was demonstrated.  How can you claim he lowered it to 18,000 rpm??   (For the other members: Itsu's video is here:  http://www.youtube.com/watch?v=syxL4f2OsPg )


quoting from your post to Farmhand:

The serial bifilar coil generates a quarter million times the potential between the windings as the monofilar. How can you overlook this overwhelming difference? All you refer to is the D.C. resistance and inductance. What about the enormous difference in Hi-Voltage potential? I drummed this in relentlessly. Pay attention! The Tesla serial Pancake coil was pateneted as an iron ferrite MAGNETIZER COIL! The coil magically transmutes iron into a permanent magnet!

What you wrote above proves that you try to make out any possible "explanation" which seems to prove the superior performance of your "synchro coil". Here is a link to the Tesla patent, very easy to quote the original text because of the neat style of the html page: http://www.teslauniverse.com/nikola-tesla-patents-512,340-coil-for-electro-magnets  and please quote Tesla's text where he wrote about any iron ferrite magnetizer coil or he wrote about turning any core into a permanent magnet!

The other thing is you claim a COP of 2 for the series bifi coil versus the monofilar coil because in your paper clip tests you found your electromagnet with the series bifi coil lifted up 2 pieces of paperclips  while the monofilar electromagnet lifted up only one paperclip: Please explain that in those tests where or how was the quarter million times higher potential present in the series bifi coil when you used a 12V DC battery source for the tests? (You wrote earlier to my question that you used a 12V battery.)

Gyula