yes Matt shows some dual ssr but too slow but yes works Stan has 1 in the dual variac box

Okay. Thanks for that info

 Yes you can get coated ss wire from Car Seat Heaters.
or buy from mabufacturers globally

the resistance is better but not having it is not vital.

DD

Thanks for that Dan, I was wondering about this. I should get some time to continue my inductor building this weekend.

Dan, could I ask if you have any hints on a source for e52 2000 pem ferrite mentioned elsewhere. I can source a similar item from the UK, its etd54. 52 not common here. I can convert the winds based on measured AL value, but would like to compare.

Hi  I have the bififar professional wound coated Coils PRe wound here
about 1200 pcs  $8 each
but core are common but no stock at this time
just look e52
Dan

Ah okay. Do you sell the prewound coils? Is that something I can buy for my testing. Ill look again for a core too

 I can send you free bro just  pm me address etc coil is easy for me to send  you. 
as you are contributing to forum

DD

Ah. Thanks Dan. I'll do that. I have some other things to do in the meantime so I'll do those first and give you a message when I source the ferrite. If that's okay.

no probs plenty here ready to send

Great. Thanks Dan. I have been sourcing other things to test, too. On the way I have a etd54 ferrite with permeability of 2100, so should be fairly close. Ill continue to look for an e52, more updates later this week

Dan is correct on SS wire not being necessary.  There was much discussion in here about using SS wire but it was related to driving injectors not standard cells.  Not sure if anyone got injectors to work including Stanley. Injectors require some very expensive machining and a very good understanding of how everything works, Due to design to make the energy balance work required the additional resistance in the coils that SS provided.

Ronnie Walker had a very long thread in here that walks through the calculations to do the energy balance.  I built myself an excel spread sheet to follow the calculations so I could better understand things.    I reduced thread to a word document and removed unneeded items and to have a reference I could search.  I have posted that in here.

I sort of at the same point you are except I build the VIC boards and control system instead of the 8X or 9x boards.  I did build a set of coils but not the cells so I could see the wave trains.  I did work with Dan to get bugs out the boards.

In process of trying to build a set of cells.  I hate impedance calculation to many variables.  Couple of things Ronnie did say was cells could be scaled but you need to maintain the energy and impedance balances.  He did not say how to do that but say you need to start with cells. 

As far as I know everyone had problems finding the ferrite core that Stanley used. 

Everything I have done is posted in here.   If I can help with anything let me know.

Earl

 Earl I would like to pick this up again on  this thread as I have now 3 months free and fwill ebring int the pcbs again and send
https://open-source-energy.org/?topic=3568.0

i wi get a long board made for these now

Gone have been looking for something to do be glad to help.   Are there circuit diagrams for boards?

Earl

yes I think I have all circuit here re drawn in db  37

so we can start  main board and those let me gather the various items

Dan and post here they maybe in threads
already i think we did that

Thanks for the info Earl. I have a lot of pcb design experience and also, have a my own cnc lathe and milling machines here so have a good setup to try things out. Test cell is in the works but i want to build up a few coils to do side by side testing. Id like to do many more but things are busy for me this time of year. I have sourced a couple of etd54 ferrite cores, very similar to e52 just slightly bigger. I have dans spec so can try to match it to these cores, which are much more available here at least

Etd54

A single layer of bifilar winds on same ferrite rod used for earlier lawton tests results in 78uH. The initial idea was to replicate three layers in this video. https://youtu.be/pAdyXI-83uU but, bifilar winding wire this thick (1mm) in multiple layers without the bobbin to prevent end slippage is impractical

COOL

I think the next step, is to make a custom bobbin for the etd54 so that I can match the winding spec for e52. I have put together a LC calculator so I need to first wind 100 winds and measure the AL value, from there I can estimate the winds but I need to also order the yellow insulation tape. I may also design a bobbin for these ferrite rods so multiple layers can be more easily would on them

Ravi D14 reference

A useful page I found testing dialectric strength of PLA 3D printing filament: http://www.kerrywong.com/2019/01/06/pla-dielectric-strength-measurement/

Provisional work on small cell.

Cathode is 18mm dia O.D. 15mm I.D. and 69.7mm long

Anode is made from solid 12mm diameter, 101.7mm long, with ends bored to 10mm I.D. at circa 20mm deep.

Observations. Resonant frequency is almost 2f (octave spaced) measured by holding the tube at 1/3 of its length, exciting with a brass hammer then measuring resonance with spectral analysis. Keep in mind that the slots are not yet in the Anode. So this resonance value will change. Interesting to see, coincidence? Possibly.

A few working files for a cell design. Focus is on designing a unit that could be 3D printed and reproduced easily. Also, modified to suit materials available locally. There is still some work to do on this around connection points etc. but the basic elements are all here.

NIce Post , for people to study,

DD