Material for TPU core??

[clone477]

I have a feeling this is a question that many people know the answer to, but I can't seem to find the answer on the forum, just because of the shear volume of post on the TPU.  I working on a simailar project, Tesla's Converters, but am having trouble with my cores staying magnetized.  Tesla's converter patent and the TPU seem to work off the same principle, so Im hoping this is not too off topic for this section.  This is what I posted from the Tesla section of the forum..... 

I have built two models of this patent, but each time my core will stay slightly magnetized.  Which is not good.  WHAT CAN I USE FOR THE CORE MATERIAL??  I used garden wire and clothes line wire, but both retain a magnetic field. 

I was thinking ideally that powdered Iron, or Ferrite would be best for higher frequencies, but I can not for the life of me find and in larger diameters, like 6" or bigger.  Can someone suggest something for this??  This project seems so promising but I already spent alot of time on winding by hand just to find out my core material is no good.  Thanks for any advice.  Fern

[Magnon]

I have a feeling this is a question that many people know the answer to, but I can't seem to find the answer on the forum, just because of the shear volume of post on the TPU.  I working on a simailar project, Tesla's Converters, but am having trouble with my cores staying magnetized.  Tesla's converter patent and the TPU seem to work off the same principle, so Im hoping this is not too off topic for this section.  This is what I posted from the Tesla section of the forum..... 

I have built two models of this patent, but each time my core will stay slightly magnetized.  Which is not good.  WHAT CAN I USE FOR THE CORE MATERIAL??  I used garden wire and clothes line wire, but both retain a magnetic field. 

I was thinking ideally that powdered Iron, or Ferrite would be best for higher frequencies, but I can not for the life of me find and in larger diameters, like 6" or bigger.  Can someone suggest something for this??  This project seems so promising but I already spent alot of time on winding by hand just to find out my core material is no good.  Thanks for any advice.  Fern

About possible core materials you can read on Topic: Acoustomagnetic TPU / SEG calculation model



--Magnon

[innovation_station]

THE TPU CAN BE A COMBO OF ...  FREOITE  AND IRON ...

I USE FEROITE ... TOROIDE 1 " AT HIGHER FREQ ....  TO CHARGE A CAP I THEN DISCHARGE THE CAP MUCH SLOWER TO THE IRON .... YOU WANT THE MAGNITICS DUH!!! 

HOW THE HELL YOU GONNA GET AC FROM DC ... WITH OUT THE USE OF BOTH N AND S MAG FEILDS ...

LOL OMG!

LOOK AT IT THIS WAY

YOU APPLY DC VOLTAGE TO A COIL ... WHAT IS THE RESULT .??   LOL  YOU GET A NORTH AND A SOUTH POLE....  HUMMM TAP BOTH ...   DO A SERCH FOR MK2 WINDING CONFIGURATION .... 

[Paul-R]

The toroid in Bob Boyce's circuit uses low permeability powdered iron.

[innovation_station]

The toroid in Bob Boyce's circuit uses low permeability powdered iron.

OK THEN ... 

WHAT IF I SAY I CAN DO THE SAME WITH OUT A CORE ... 

YOU DONT NEED A FEROITE TOROIDE ...  LOL

BUT IT MAKES IT MUCH EASER TO WIND AND YOU GAIN MORE ..... WITH 1 

IST!

OR TRY THIS MANS FINE WORK .... 

http://www.youtube.com/watch?v=V-Uy7MLkPFE&NR=1