Towards Realizing the TPU

[otto]

Hello all,

maybe a copper + aluminium core would do the "job"??

Didnt SM told us to use this metals as cores??

Otto

[poynt99]

I don't know if there is any type of metallic core in any of SM's devices, but we can't see inside all of them. There doesn't appear to be any core of metal description in the devices we can see. Maybe wattsup's new diagrams (when released) will reveal some new aspects of the devices.

Spherics didn't call for any cores at all for his version.

.99

[Grumpy]

The delay coil's purpose was just to introduce a delay on the cheap. Any "slow" conductor should do the job.

Spherics spoke little of iron's effects and purpose (aside from providing a delay) in the device and I am not convinced that using its NMRF is integral to achieving a successful design, (geometric or otherwise) esp. since his tetrahedral device contains no iron. Fortunately, we have function generators/oscillators etc.

Spherics left us with some good material, but like all others, there are inconsistencies and gaps, unfortunately. I am not complaining though

.99

btw, I suspect Steven "liked" 35.705 kHz for his 15" TPU, because using 35.7806 kHz is the exact frequency that would cause runaway.

The iron delay stuff has nothing to do with the tetrahedral device - it's apples and oranges.

Iron reacts to things in a way and is not beneficial for this application.  That is all you need to know.

Are you building it or just agonizing over the details of how it might work?

[otto]

Hello all,

maybe a fine guy can find the text where SM said in his way to use copper and aluminium as cores??

Sorry, I dont have the time to do it myself.

Otto

PS: maybe then some people would wake up??

[poynt99]

The iron delay stuff has nothing to do with the tetrahedral device - it's apples and oranges.

No argument here.

Although I did not make it clear, the iron reference was to spherics' mention of SM's use of it in his own devices. I do know the material fairly well btw

One point I am trying to make is with reference to the Fe NMR frequency, and why it was specified for the tetra design. Maybe it is geometry, maybe not. Time will tell.

Are you building it or just agonizing over the details of how it might work?

The purpose of this thread and the document is outlined in the opening paragraphs. This includes discussion on all aspects of the TPU design and operation.

.99