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2020-10-24, 07:36:41
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Author Topic: Smudge proposed NMR experiment replication.  (Read 14130 times)

Group: Professor
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So physically different (mirrored) from the first one?
No, because the coil can be flipped around to make a bucking field. These pancake coils essentially do not have a direction and a hot/cold side because reversing their connections or flipping their sides predominantly changes the direction of the H-field generated by them.

Practically, some of the turns of these coils cross "above" and some other turns cross "below" the former. The idea of the mirror or side flip is for the "above turns" to mesh with the "below turns" of the 2nd pancake, so that the axial distance between the two pancake coils remains as constant as possible.
« Last Edit: 2020-10-17, 01:41:46 by verpies »
   

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Right, so only the crossing scheme will be different from the first coil.


Started to build a second former using 1mm fishing line etc. to create the 2th pancake coil.


I moved the part about the defective Manson SPS4900 PS to a new thread here:  https://www.overunityresearch.com/index.php?topic=3960.msg84636#msg84636


Itsu
« Last Edit: 2020-10-08, 00:10:34 by Itsu »
   

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I finished my 2th, spaced, weave 1 pancake coil (left) which is mirrored compared to the right coil.

16.14uH @ 100KHz compared to 16.17uH for the first one.

Itsu 
   

Group: Professor
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Posts: 1913
I finished my 2nd spaced, weave 1 pancake coil (left) which is mirrored compared to the right coil.

16.14uH @ 100KHz compared to 16.17uH for the first one.
So you don't need to flip it and you've got the first point from the list below, behind you.

So the next steps are:
1) build another pancake to create a bucking H-field when connected in parallel and to minimize the E-field occuring between the two pancake coils.
2) wind the toroidal coil with the same winding technique as the pancake coils in order to avoid circumferential induction in it (this is the major contributor to the H-field crosstalk).
3) surround the toroidal coil with a grounded E-field (only!) shield as described here in order to minimize the E-field crosstalk.
   

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Quote
2) wind the toroidal coil with the same winding technique as the pancake coils in order to avoid circumferential induction in it (this is the major contributor to the H-field crosstalk).

Mammoth task requiring lots of patience...........
   

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Mammoth task requiring lots of patience...........
I know, I've done it but I put some gaps between the turns (like with the pancakes) so it goes faster.
   
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