Towards Realizing the TPU

[sparks]

   Sorry forest back to the kicks and tubes.  The below is talking about spark gaps but the same can be applied to a tube or diode.  It's about impulse energy or what to do with the kick.

         In most over-voltage spark gaps avalanches of electrons move towards the anode. As the number of electrons increases Coulomb's law states that also the field strength increases. The strong field accelerates the avalanche. A slow rise time of the voltage lets the electrons drift towards the anode before they can generate an avalanche. Electrophilic molecules capture electrons before they can generate an avalanche. Thermal effects destabilize a homogeneous electron discharge and ion diffusion stabilizes it.

@EM

     Tesla did a patent on an improved transformer.  An improvement on the ones being utilized on the poles down the street.  One that creates a rotating magnetic field as described by forrest.  By using magnetic shielding on different EXCITING
coils.  This rotating magnetic field needs only another set of coils to experience the rotation.  Unlike the classical transformer where the magnetic shielding is destroyed by the secondary current draw.  Tesla is shuffling it around. 

   In a torroidal transformer the current draw of the secondary does not effect the impedance of the primary.  The current draw of the secondary is magnetically out of phase with the primary input.  Attention to retainance of the magnetic core material must be adressed.  If the core appears as saturated to the next ac or dc pulse excessive current is drawn from the line.  As most magnetic materials saturation parameters are set by the ambient magnetic field of the Earth the core of a torroidal transformer can effectively capture this diffusion capacity or it's ability to reset the magnetic domains of the core.  When the Sunspots hit this becomes quite apparent to transformers as they go into oversaturation.  Not so apparent is the input from the more constant coronal mass ejections of the Sun creating bow shock waves transmitted into the poles incessantly.

[otto]

Hello all,

nice discussion.

We know that SM first used tubes and then transistors. Fine!

Here  my short story:

A few months ago I made 3 tube oscillators and connected them somehow to my TPU. Nothing. I changes the values of the components and the connections in the TPU. Nothing.

Today I was very "clever" and took 1 12AU7 tube from my oscillators. Connected the 12,6V heating, the anode voltage and wanted to pulse this tube with a transistor. In this way I thought I dont need oscillators made with tubes.

Before I connected the pulses I wanted to see the working properties of a 12AU7 triode and then I saw it:

The grid needs NEGATIVE pulses.

So why are we pulsing our TPUs with positive pulses? Maybe Im wrong. Its worth a try. PNP MOSFETs.

Otto

[BEP]

So why are we pulsing our TPUs with positive pulses?

Most are not. The majority of circuits shared have the switch at the negative end of the coil circuit. They are switching the negative side.

However, driving a grid negative is not unusual. It is unusual if you have no applied anode current and scope the anode (plate) anyway. re: SM comments about heater voltage appearing on the plate current...

[sparks]

    Why not hitem both with positive bias real quick and see what makes it through the grid in the way of accelerated electrons.

[otto]

Hello all,

a few hours ago I saw that my tube transformer can give me only 10V for the tube heating....

I have another very big transformer to drive my tubes.

Its sooooo boring to pulse the coils with transistors. It seems thats finally tube time for me.

I have good coils, very good cores and now its time to figure out what to do with tubes. Maybe you know it but Im always thinking in a contra way to say so.
On the other hand Im always thinking about what SM did. Did he use tube oscillators + amplifiers? If so, what kind of signals did he get on the output of this amplifiers? Sines? Or kicks? Are then the kicks converted into sines inside the TPU? I alreday saw a long time ago.

If we use PNP MOSFETs whats the difference? I mean the difference between NPN and PNP Kicks to say so.

I can imagine there is a difference. Not at all frequencies but at some of them I can imagine that the TPU is then easier "connected" to the earths magnetic field. And in the moment when this "connection" happens ........BOOOOOM!!!!

As you see I have a lot of questions for myself and I know I have to work hard to get all needed questions.

A lot of guessings and speculations. I only wanted to show the people here what I want to do, nothing else.

Otto