The TPU uncovered? (A PROBABLE technique.)

[Peterae]

Grumpy
I think you are underestimating how many people do replicate the stuff on OU, i have been building since i read the SM threads nearly 2 years ago.
I am looking forward to your build of this, it is on my todo list, but working on EM's device at the moment.

I dont post much, thats because i can be a bit blonde sometimes and would really only post when i have found something interesting, which to date has been nought

Peter

[pauldude000]

@Grumpy

If you have problems winding loose bifiliars on pvc, that is because of the slickness of the material. You can coat it with a thin layer of molten beeswax and it makes winding much simpler.

By the way, I prefer cardboard tube because of the texture of the material, and mine is already wound. (2 lengths bifilar approx 60ft each 24ga, with iron "delay" coil.)

Paul Andrulis

[Grumpy]

@Grumpy

If you have problems winding loose bifiliars on pvc, that is because of the slickness of the material. You can coat it with a thin layer of molten beeswax and it makes winding much simpler.

By the way, I prefer cardboard tube because of the texture of the material, and mine is already wound. (2 lengths bifilar approx 60ft each 24ga, with iron "delay" coil.)

Paul Andrulis

I need the slickness so i can easily push the wires into position.  I'm using 3" poly drain pipe for this one.  This will put the diameter close to the length for max self-induction.  I learned this from Dollard, but have since seen several radio guys use coils with these dimensions (length = diameter).

Did you put the iron coil away from the bifilar?  Got a picture?

[wattsup]

@sparks

I respectfully disagree and here's why.

If we are to presume that @Grumpy's diagram will result in a first pulse and a second pulse that is slightly delayed, then the first pulse being alone will create a field and the second delayed pulse will neutralize it, create a field, neutralize it.

But all this will depend on two major factors and that is pulse frequency and duration. If the first pulse is long enough to overlay over the second delayed side to pulse it will neutralize the field. If the first pulse is faster then the second pulse, both pulses will generate their own fields.

@Grumpy

So regarding your diagram of the bifilar and iron coil, what do you "expect" to be on the scope as A and B? I'm asking this because often we have ideas on what to try and what we expect from the trial, and more often then not, the result is far from expected. I am not asking this not to put you on the spot, because regardless of what you think will be on the scope and what actually will be on the scope, this is all a learning process for all of us.

I myself would obviously expect the elementary scope shot being two square waves A and B just a tad apart. The tad apart would be the effect of the iron coil.

But here is my problem with this. Wire length. Again at the short wire lengths shown in your diagram, one would have to pulse these coils at higher then the 2mhz my present function generator can muster up. I wonder if anyone knows how to do the math on the frequency range required to be able to see the difference (lag) between A and B. My scope goes up to 60mhz. All combined, probably not fast enough to see it cause we're probably talking gigahertz range.

Then the other question is about probe positions. What is the difference between where you show them at the end of the red and blue lines, or if you simply put them together on the actual ground line

Anyways, I just received 10 pounds of AWG 24 magnet wire that I ordered to try more of Ottos shinanigans. I'll try the bifilar also because I have some other ideas for this bifilar that I think is relevant to the TPU but not in the spherics sense.

[Grumpy]

@ wattsup,

Thank for this fine example of how to talk yourself into staying in the Matrix by talking yourself out of performing an experiment, and how to maintian erronious beliefs at the same time.

Wind it yourself or keep hoping someone else will do the work for you.