Tesla's "COIL FOR ELECTRO-MAGNETS".

[MileHigh]

I challenge both Milehigh and Tinselkoala to a no limits bet, that I will board a plane to London England to insure with "Lloyds of London" tomorrow! I am willing to bet any amount of money from my pool, that no monofilar pancake coil can transfer power without heating up like the series bifilar pancake coil does off JLN's commercial hotplate.

This is just noise and tomfoolery.
 

[conradelektro]

Because I want to do some comparative testing of coils (bi-filar versus mono-filar) I went through this thread (which costed me many hours).

At the beginning of this thread I found some very helpful posts about measuring coil resonance and other coil parameters by

gyulasun,
MileHigh  and
TinselKoala.

I collected the many good references and explanations and will use these techniques (function generator and scope). I have some questions, but I will post them once I started with real measurements (exact circuit layout for testing a coil with a function generator and a scope). It will take some time to go through the material and to understand it.

My understanding is that no tests have been done concerning the difference of bi-filar and mono-filar coils as "pick up coils" or "generator coils". But I might have overlooked it or misunderstood something. The capability to act as a good "pick up or generator coil" might follow from the discussed coil parameters?

Nevertheless I want to do a few tests in this area.

Greetings, Conrad

P.S.: I will not create a new thread for my tests, because this thread covered already most of the topic and looks like the right place.

[synchro1]

@Conradelektro,


Thanks for following through with the correct format. Consolidation of thread content is essential for practical research. My special interest is to see if you can measure any difference in the magnetic power per unit of input, between the monifilar and series bifilar spiral pancake. I'm looking forward to your results.  

[conradelektro]

I wound two pan cake coils, one monofilar the other bifilar. The physical dimensions are almost identical and I used the same wire and wound the same number of turns (bifilar has half the number of turns but the same length of wire).

See the drawing for the specification of the coils and some measurements. The coils are held between two plexi glass sheets.

I also did a first test with the coils as pick up coils at 15 mm distance from the spinning magnet (1200 rpm). See the drawing for the result.

Astonishing enough, I can not see any difference in the coils (DC resistance, inductance and pick up capability seem to be identical).

I have a question concerning TinselKoala's video https://www.youtube.com/watch?v=VpJwCNBHUh0 (Scoposcopy):

Attached please see a circuit diagram for the "coil resonance measurement", is this correct?

TinselKoala's pan cake coil (from the video with a 14 strand wire) has 0.2 Ohm DC resistance and 102 µH inductance, my pan cake coils have a DC resistance of 0.4 Ohm and 34 µH inductance. This seems to be consistent because TinselKoala's pan cake coil is bigger and has a very conductive wire (14 strand) while my coils have only a one strand wire and are smaller. In my coils the wire turns are farther apart (due to the thick insulation of the wire) which should result in a lower inductance.

Greetings, Conrad

[TinselKoala]

Sorry, I've been distracted and didn't see your question until alerted by your PM.

Yes, it looks like you are going to do just what I showed in the video. I believe your schematic is correct for this method.

Keep up the good work and be sure to post your results!



ETA: Also, be sure to check out the video from "Gestalt Reality" that Mark D. linked in his "Thane debunked" article on revolution-green. It's long but contains highly significant information.
http://www.youtube.com/watch?v=kfRxsC9yumQ

I would be interested to see if you can detect any voltage difference when your two coils are open, rather than feeding a load.