Toroidal Power Amplifier

[nilrehob]

nil, have you done any more testing with your two toroids?

no, too busy with other things right now

btw where did you get then..and at what cost?

This is where i got them from RS Components International

/Hob

[rave154]

Hi folks,

using the setup as shown in post #45 i made an attempt to determine if shorting the 2nd of the two toroids on the right hand side not only gave an increase in the power of the toroid connected to the FWBR....but also DID NOT make the current rise in the primary.

i adjusted the FG using pulsed DC and adjusted the duty such that only 6.1mA was being drawn....the first toroid was already "shorted" at least via the scope... i then directly shorted the 2nd toroid and not only did the output on the scope almost double..but the current being drawn by the primary DID NOT RISE, in fact it seemed to drop by perhaps 0.1mA ( probbaly just a meter flicker ). however it DID NOT rise !

Does this suggest it would be possible to setup a number of multiple "secondarys" such that they pulled ALL of the available energy out of the system without any impingment on the primary end of things?......in other words..... a 100% efficient transformer ( minus normal heat losses etc of course )

[nilrehob]

Hi folks,

using the setup as shown in post #45 i made an attempt to determine if shorting the 2nd of the two toroids on the right hand side not only gave an increase in the power of the toroid connected to the FWBR....but also DID NOT make the current rise in the primary.

i adjusted the FG using pulsed DC and adjusted the duty such that only 6.1mA was being drawn....the first toroid was already "shorted" at least via the scope... i then directly shorted the 2nd toroid and not only did the output on the scope almost double..but the current being drawn by the primary DID NOT RISE, in fact it seemed to drop by perhaps 0.1mA ( probbaly just a meter flicker ). however it DID NOT rise !

Does this suggest it would be possible to setup a number of multiple "secondarys" such that they pulled ALL of the available energy out of the system without any impingment on the primary end of things?......in other words..... a 100% efficient transformer ( minus normal heat losses etc of course )

Im not 100% sure what youre doing
but it sounds interesting!
Looking forward to more tests and their results

/Hob

[rave154]

Nil,

here is what i was doing.

Look at the image in post #45, the toroid W-3, that is attached to the FWBR & cap, i had it simply connected to the scope with no FWBR or cap etc. When i shorted W-2 not only did it NOT increase the amp draw in the primary but it also increased the output shown on the scope by almost double.

[nilrehob]

Nil,

here is what i was doing.

Look at the image in post #45, the toroid W-3, that is attached to the FWBR & cap, i had it simply connected to the scope with no FWBR or cap etc. When i shorted W-2 not only did it NOT increase the amp draw in the primary but it also increased the output shown on the scope by almost double.

Oh dear, this means I have to get a third toroid

Otherwise, really cool!
Can you put resistive loads on there somewhere?
After all, resistive load is what counts in the end.

/Hob

[rave154]

I will put a resistive load on the one toroid with scope across it....and then short the other toroid..and see if theres an increase on the scope.

and yes, you will need 3 or more toroids.

[rave154]

well,

i put a resistor across the one windings with the scope across it....and couldnt barely read a voltage

[nilrehob]

well,

i put a resistor across the one windings with the scope across it....and couldnt barely read a voltage

So I thought, lots of VArs but no VA

What about another coil as load? or transformer?
There must be a way to create VA out of VAr

/Hob

[rave154]

nil,

be interesting to see if you get the same thing as i did.

[rave154]

Hi,

Well, i did some more "tests" today....and im even more confused.

This setup seems to behave backwards in some ways...and.....normally in others.

As an example, when using 1 loop through the second toroid i got the output i expected......however when i used 1 loop...but 2 "turns" around the limb of the toroid it cancelled the output almost completely.

I guess ill have to wait and see what other people can do with better toroids than i have.

[nilrehob]

i'm really busy fixing the house that i recently moved to
so i cant do much experimenting unless really bad weather
but here is a quick one i just did

still with the same setup with my two toroids as in the picture:


i put a rectifier and a capacitor on the middle winding where there is no voltage,
only current when there is load on the right winding:


The cap got up to 50V and the lamp would go out.
When i dumped the cap to a battery the lamp would blink,
probably as the cap filled again.

/Hob

[rave154]

Nil,

thanks for squeezing that test in for us

im pondering it now

[boguslaw]

Do you know maybe what material is such toroid core composed of ?
Where to find such large ones ?

[rave154]

Bogus......

i would think they are ferrite.....but perhaps powdered iron

im having trouble finding large ones too ( for a reasonable cost )

[boguslaw]

Is that related ?

http://purco.qc.ca/ftp/Overunity.com...pu/ottotpu.pdf