The Builders Thread

[stevend]

Aaron,
By the way, I purchased my Barium Titanate from here back in 2002:
Item # BA-901, Barium Titanate Powder on Atlantic Equipment Engineers, A Division Of Micron Metals, Inc.
12lbs came in a whitish fine powder form in a plastic bag in a 1 gallon can.
-Steve

[Michelinho]

Flynn parallel path transformer/generator.

Hi all,

Vickers

Lol. Practical science was the word s I was looking for.
Pictures or vids of forum members personal energy related work/projects etc..
I think it would very inspiring to myself and others here to see members actual projects finished or in development.

Here is one of many projects I am working on when health permits, the Flynn parallel path transformer/generator prototype. I did quick tests on it with my signal generator and the output level reached 2.26 Vdc after rectification. The L1 coils are triple AWG 25magnet wire bifilar and the L3 coils are multi braids AWG 16 bifilar lamp speaker wires. I will have to rewind the L3 coils (output) with magnet wire for the final device to attain a higher voltage output.

Builders are not a dying breed but in these hard economic times, basic needs prevail.

Take care,

Michel

[nvisser]

Are you using laminated cores?

[Michelinho]

Are you using laminated cores?

Yes, the core is laminate. I tried different magnet strength in ceramic grade 8 and Neodymium. The 1/2" X 2" N48 is what performs best.

Take care,

Michel

[stevend]

That is cool ****. I must confess I love caps. my first job was operating a brake press that made cap housings.

Sadly the BaTiO3 one didn't work (K around 2, same as the wax alone.) See attached photos. It has worked fine in the past when I made a flat plate capacitor but as you can see in the photos I'm making a cylindrical one and I have to pour the mix into a small gap (5mm) around the central rod electrode and the thick BaTiO3 portion of the mix doesn't pour well. Instead only the liquid, primarily wax portion pours in. A similar issue caused my BaTiO3/epoxy mix to not work out.

But I think I've finally figured out how to do it. I'll go back to using BaTiO3/epoxy since that'll give me a 20 minute working time and I'll tamp in the thick stuff. I'll also use a transparent mold so I can see the result of the tamping as I go along.
-Steve
http://rimstar.org http://wsminfo.org

[stevend]

Aaron et al,
I just finished about 2 weeks of work on figuring out how to make the best barium titanate dielectric for my cylindrical capacitor. The way that worked as to create a thick sludge of BaTiO3 (80%) and a slow curing epoxy (20%) (slow curing so that I had a long working time) and to push this into a mold and tamp it down as I went along. This gave me a dielectric constant of 15. I also tried BaTiO3 and wax but the mix cools too fast them trying to get it into the thin mold. A BaTiO3/wax mix has worked for me before but only with a large mold where I could quickly dump it all in place. That gave me a K of around 15 too.

Things that didn't work were whenever the mix was liquidy (to low a percentage of BaTiO3) and when pure BaTiO3 powder was used but not under abnormal pressure (too much low dielectric constant air.)

Full details of all my efforts can be found at:
Barium Titanate Capacitor (BaTiO3)

Aaron, a K of 15 with the measured capacitance I got suits my needs. I think you need a much higher K but at least I've documented a lot of things for you that you won't need to try, if you're going to that is.
-Steve
http://rimstar.org http://wsminfo.org

[tjnlsn255]

Here is my Bedini Window motor.....

I learned a lot and I liked my idea of how to mount the magnets with slots so that I can just change the inserts and change the magnet types, sizes, etc......

I am now working on the basics of a Steorn e-Orbo but I do not know the secrets so it is just the basic build so far.....

Winding toroids is a real pain.....LOL.... I have talked to a couple local coil winding companies and I may leave that part to them and their really cool coil winding machines.....

Hopes and Dreams....

Tj

[Richie_asg1]

Stevend - Try mixing powder with wax in a melted state, let solidify, reduce to powder again incorporating wax, then press it into your form under hydraulic pressure - you won't need much. This sintering process used in bearings works very well, and is also used to make candles cheapr than melting the wax.

Also - powdered sulphur sinters well under pressure, a lot of resins, and waxes.


I agree with the "one hole" philosophy. I'm restoring two pre-1972 Land Rovers, and at times it seems the projects stall. Even in bad weather - there is something I can do.
One is to sell - to provide funds for the other, which will be a 2.0 TDI running on neat Veg Oil, with on-board filtration and heating. Basically a military version with one "Veg" filler on the LHS, and Dino Diesel on the RHS. Filtration will ensrue it will take anything oil related and run on it, while the basic design makes it EMP hardened. The overall design is ideal for self-maintenance.Should last my lifetime May sell the designs for 3rd world Aid waggons.

[stevend]

Stevend - Try mixing powder with wax in a melted state, let solidify, reduce to powder again incorporating wax, then press it into your form under hydraulic pressure - you won't need much. This sintering process used in bearings works very well, and is also used to make candles cheapr than melting the wax.

Also - powdered sulphur sinters well under pressure, a lot of resins, and waxes.

Very cool! Thanks for the tip. With the resin the best ratio I can get is 80% barium titanate to 20% epoxy - beyond that I can't bind any more powder to the epoxy. But I haven't gotten far enough with wax to see what the best ratio I can get that way is. Now I can take the process farther and see.

I did crack open another mold today and found that tamping doesn't work very well when the gap I have to tamp in is just 2.5mm. But that's okay. The 6mm gap that I documented on my webpage:
Barium Titanate and Epoxy Cylindrical Capacitor - K=15 (April 15, 2010)
gives me a good enough capacitance (75pF) and K (15) to start with.
Thanks again!
-Steve
http://rimstar.org http://wsminfo.org
PS. Now I'm really feeling like I hijacked this thread. I should have created a separate one.