Fished bobbin ready for some light sanding and painting. these bobbins are rock hard and slide right over the core plus are cheap and easy to make. they can be made square or rectangle for your core really making it easy to wind your primaries and secondaries.
i will say this though, do not use plastic below when attaching the end pieces as it cause it to ripple from the heat or the chemicals. the ripples made it hard to get a smooth flat end cap. the other time i made these i soaked a 2x4 with light oil before i made the end pieces.

Regards,
Marathonman

I would also like to add more information on that 1 kilowatt output, 14.8 lbs per square inch 7.4 per primary.

in order to induce movement into the secondary Figuera had to reduce one primary and raise the other to get the sweeping of the secondary across the electric field. in doing so the reducing primary is reduced hypothetically 30 percent while the other is increased to get full sweeping action of the secondary.
so if you reduce one primary 30 percent that means from 7.4 lbs per square inch to 5.2 lbs per square inch while the other primary is peaked at 9.6 lbs per square inch. the rise in the primary is from the amplification factor of the two reducing potentials and the secondary feed back combined giving the needed amplification to the rising primary electromagnet. from this action both primaries will always maintain the 14.8 lbs per square inch across the entire length of the secondary needed for the 1 kilowatt secondary output. these numbers are not exact but at least you get the idea of what needs to be done in order to maintain the output and how it is done.
the primaries must be built with these parameters in mind yet still avoid saturation.

both primaries at any time will add up to the total output of your secondary. one increasing in pressure the other decreasing in pressure but both pressures equal the needed secondary output pressure at all times.
now try that without part G inductor using electronics..... NOT !

Regards,

Marathonman

Remember the Inverse Square Law when building your primaries.
through my many tests i have performed the magnetic field can only be detected out the same length of the core with the coil wound the whole length of the core. in the Figuera 1908 and all the other Buforn patent even though it specifically says it is just a drawing for understanding the patent pic of the primaries being larger than the secondary has substantial merit when considering the square of the distance.
the Inverse square Law tells me the primaries should be at least 1/3 longer than the secondaries thus the secondaries should be calculated to handle your load then half that for each primary.
Regards,
Marathonman

TO STEFAN HARTMANN;

The member lancaIV is some how posting in the past posts,  posting total Gibberish that has NOTHING to do with this thread. how is this complete nut case breaking in this thread and posting in the past after weeks or months have passed by. this member is a known nut case and a total disruptor of threads and should be barred for life from this forum.
people are trying to learn on this thread and use it as references to build their device only to be hyjacked by this complete fool. how is this possible Stefan that this person is cracking into this and other threads from in the past posts.
I review my past posts and came across this hack job and those posts were NOT there weeks ago so what gives.

this action from this forum member is totally uncalled for, is totally gutless, ruthless and should be barred for hacking into your forum.
Please tell me how is this possible Stefan??
Or do you even care someone is hacking into your forum. i would like to know how this unethical behavior is taking place and how long has it been going on.?
Regards,
Marathonman

isnt there a blacklist button to block ?

truth is these type of forums really are tin foil hat get togethers and religious freaks , the  alternative is engineering forums then it swings the other way and theres no give there .

Honestly I dont know why the hell I bother checking out this forum ...... Im ready to grab my tin hat ,bible and leave   (thats a joke cultists!)

so how is this guy editing etc is he a moderator ?

...yea I wasnt talkin about you . 

First pic is the paper between layers of double layer up and back.
second pic is completed primary.

Regards,
Marathonman