Muller Dynamo

[mondrasek]

@neptune, this is for you and Pete.

(Sorry if I have not to replied to anyone else who may have asked something of me.  I am not reading the forum right now as it takes too much time away from the data collection process).

M.

[neptune]

@Mondrasek . Hi Mo . I seem to have opened one hell of a can of worms here for sure . Ok ,so I am assuming that the vertical axis of your graph is the RPM of your rotor , which has 8 magnets .And the horizontal axis is antenna length in millimeters . Within the limits of experimental error , the nodes on the antenna are about 200 mm apart . If the nodes are one quarter wavelength apart [ correction invited from more knowlegable persons] that represents a wavelength of 800mm or 0.8 metres . 300 divided by 0.8 =375 Mhz , which seems a fantastically high frequency . At a rpm of 1450 with 8 magnets we get 193 hertz . That is 193 cycles per second as opposed to 375 million cycles/second . No simple ratio here!
Does anyone else have any theories ?

[mondrasek]

Can you confirm that your measurements are in millimetres , and you are cutting 20 cms off at a time .

My measurements are taken (so far) in a relative fashion.  I am not sure of the exact entire length of all the pieces I have cut off of the antenna wire so far.  I will measure the exact length (somewhat) after the end of these tests.  But I am close enough now (antenna wire less than 6M) to measure a fairly accurate antenna length now if that is important to you.

I started by cutting off 20 cm each time.  Then I changed the cuts to only 10 cm as things began to get interesting in the data.  I then again switched down to cutting off only 5 cm. 

BTW, are you a Brit?  I've sort of got that hunch after the past few posts.  But the timing of those posts makes me think you are either a night owl or a Canadian?

Nevermind answering my questions if that is too personal or not "anonymous" for any reason.

Cheers!

M.

[mondrasek]

@Mondrasek . Hi Mo

Your assumptions are correct.  Sorry for not posting the graph's data chart or labelling it properly, but I am again running out of testing time.

(Added later) Sorry to everyone:  I removed some of @neptunes post from my reply as I did not want it to be misinterpreted and become "misinformation".

Please note:  THE "LENGTH" OF MY ANTENNA WIRE IS NOT CORRECT!  I am just using an "assumed" starting length so that I can get graphical data.  I will change that "assumed" length to a real one once I can add up all the 20 cm, 10 cm, 5cm (and whatever is to come) pieces that I am collecting each time I shorten the antenna.

Sorry for any confusion this method is causing.  But I do not have a tape measure long enough for measuring the initial length of the antenna being tested.  So I figured I would approximate the initial length after the end of the test.

But I am now within antenna length range to measure with the tape I have if it is important to anyone.

Just let me know.

M.

(end of edit)

So why are you surprised by the high frequency?

Bring it.

M.

[gyulasun]

....
If the individual coils in each pair are matched, the conventional current CANNOT FLOW!  This is because each coil will be pushing equal and opposite currents (which = ZERO current).  So the currents from each coil in a pair will effectively cancel themselves.

But (please, please, please) match the individual coils in each pair exactly.  Do this by wrapping the same length of wire into each coil (NOT NUMBER OF TURNS!  Do it by measuring the length).  Do this by inserting the same type of core material into each coil until they read exactly the same on an inductance meter.

And then notice this:  Even though your set up should not be able to provide current (both coils in series, bucking, right?) it WILL provide current.  And that current must come from somewhere other than our EM theory has taught us.

@Mondrasek

Hi,  There is a problem with your perfectly sounding explanation above IF and WHEN you enter the rotor magnets between the two facing cores and ALSO when you use the backing magnets on the outer side of the core.

The problem can come from the unequal air gaps between a rotor magnet and the lower or upper cores: if the two gaps are not equal the induced voltage in the two coils must be different. 
Supposing you adjust the airgaps to be equal, then the strength of the backing magnets may be different just due to adjusting the magnets position wrt the cores.  This can also alter the coils self-inductance (you do not adjust these backing magnets for equal coil inductances, do you).

A good observation that once you still measure or normally indicate output current with the usual current meter it must be a conventional current.
Unconventional current (some call it 'cold'  current) is not supposed to be measured or even indicated by normal current meters, the presence of such current could be indicated by an incandescent lamp as other stated.

Gyula