Steven Mark`s TPU

[Mannix]

Exactly!

1AX2's do well also

Edit>>>>>>>>

I'm starting to believe the story of the tube and kick is both an example and an analogy of the key function of a working TPU. (DUH!)

Not only are they miniature particle accelerators they are also energy converters. Electricity goes in one end, is converted to dielectric and back to electric before going out. There is no control except when the energy is dielectric. The speeds of either are completely different. Their reaction to magnetic fields is completely different.

The idea of activating a cathode on my bench to cause dielectric flow from 200 KM above my head is a little worrysome.

Oh my goodness!
are you daring to suggest that electron tubes change the nature of the electron speed within them?

Further, the quality of the output is different than what went in?

Perhaps the electrons are reconstituted in some way that makes them respond to their environment  in ways that they would not otherwise.  FRESH ELECTRONS.....sounds silly, I know.

Perhaps that is why "there is no reason that ss devices would be easier to use today than 25 years ago"

They are of course much faster than ss devices...........

I suspect that we might want to use them at the upper end of their supply voltage...even more speed

Thanks, BEP ,marco, Great stuff from all who solder and wind

[slapper]

Hi BEP:

My control coils are not the same as yours. Mine are one conductor wrapped back upon itself in the opposite handedness with equal turns each way.

Is your control coil wrapped in the way one would consider to be a caduceus configuration?

Thanks.

nap

[BEP]

Is your control coil wrapped in the way one would consider to be a caduceus configuration?

I am reluctant to use names for coils as they tend to be renamed over the years as new inventors claim them as a new idea. (See other coils on this forum)  Bifilar series counter-wound with a minimal pitch would be most correct. The idea was to have equal intensity of magnetic polarity and use the dielectric radiant instead of magnetic - inside and outside. Kind of like inside a tube when conducting. It'll never be perfect but it does a good job of 'squeezing the hose'.

If you want two waves in the hose squeeze it in two places. If you want to double the waves then double the turns in the collector/hose (not quite that simple). For every time you squeeze expect anywhere from 2 to 6 somewhat delayed pulses of the same polarity (and lower amplitude) in response.

@Btentzer,

I wasn't laughing when I made that comment.
The beam created in a CRT has both mass and momentum. Maybe this is why my hair keeps migrating South.

@Mannix,

I have never disagreed with anything you have on this last comment except the SS stuff. Yes, it is easier to see such things with VT's. I am not convinced this can't be done with SS. Indeed it'll be easier for many today to pursue with SS. But I'll wager it'll be cracked using a VT first.

[epwpixieq-1]

VT as a frequency mixer:

-----

As the name implies the heptode has 7 elements, one cathode, 5 grids, and 1 plate. This tube is often called a pentagrid converter. Pentagrid as in 5 grids. It has one application, to serve as a mixer in radio receivers. (I have breadboarded and tested an audio voltage controlled amplifier using one of these tubes, but that's another story).
The Principle of Heterodyning
Heterodyning is more commonly known as "mixing", "conversion" or "modulation". OK; but what is it? If you combine two frequencies in a device known as a "mixer", "converter" or "modulator" you get two new frequencies. These new frequencies are the sum and difference of the two original frequencies. For example if you combine 5 MHz and 6 MHz in a mixer you get the two original frequencies and in addition you get 1 MHz and 11 MHz. If you combine 650 kHz and 1105 kHz you get 455 kHz, 650 kHz, 1105 kHz and 1755 kHz.

There are some types of mixers in which the original signals are canceled out and ONLY the sum and difference frequencies appear in the output. These devices are called "doubly balanced mixers" or DBMs for short. We will get to them shortly. But for now we will be talking about mixers in which the original two signals appear in the output along with the sum and difference frequencies.
So What is a Mixer?
Well, it's any nonlinear device. A nonlinear device is anything that has a graph that isn't a straight line. A diode, either vacuum or semiconductor makes an excellent mixer. A tube or transistor which is being driven into overload is another excellent mixer. The balanced variety consists of combinations of diodes and transformers, or transistors (usually in an integrated circuit). The beam deflection tube was developed in the 1960s that was a balanced mixer, but we're getting ahead of ourselves again.
The Superhet Receiver
The heptode was developed in the 1930s to combine the functions of oscillator and mixer into a single tube. Before that the two functions required two separate tubes. Reducing tube count also reduced cost so there was a great incentive to combine functions of two tubes into one.

----

Source : http://www.angelfire.com/planet/funwithtransistors/Book_CHAP-4B.html

Hope that helps in the discussion

[slapper]

Thanks BEP