A mystery device

[Wavebourn]

Guess, what it is?

[athos56]

Originally Posted by Wavebourn

Guess, what it is?

A graph, current vs voltage by the looks of it

[Sch3mat1c]

Saturated diode, possibly RF noise source. I remember running across one in the ARRL tables. I don't see it in my 1971 edition, maybe it's in the '76 downstairs...

Tim

[donpetru]

For starters I will expose some theory: All tube operation is the fact that any metal is continuously emitting electrons. The speed with which they are emitted increases very strongly with temperature, although in fact emission takes place at anything above absolute zero. To understood emission, we have to look at what is going on inside the body of the metal. In any metal, there are one or two electrons that can easily be detached from an atom. The latter are fixed in place inside the crystal structure and do not move about at all, although they vibrate in place.Since the electrons are not attached to any particular atom, they move about constantly, very much like the molecules in a gas. The average speed of the electrons increases with temperature, but because they are constantly bouncing off of the atoms and each other they do not all have the same speed but rather obey a statistical distribution law. If an electron happens to be going towards the surface of the metal, then it will naturally tend to fly right out through the surface. When an energetic, fast-moving electron hits a metal surface, the impact dislodges some of the other electrons and causes them to be emitted.

For example: An electron arriving at a 250V plate has an energy of 250eV, whereas the metal’s work function means that only around 4eV is required for an electron to be emitted. This phenomenon is called secondary emission and occurs each and every time an energetic electron arrives.

One of the main problems in the functioning valve tubes is secondary emission, in other words, secondary current flow, is almost never a good thing. The cathode tube is a conductor and therefore has a Fermi energy (Ef) in its conduction band. I think in that diagram, this Ef energy is plotted.

[bacon665]

Some new linear tube amp you've cooked up?
If its just measurements off of one tube id like to get my hands on it that graph shows it being operational with 23v@0.06ma. looks like a good candidate for a low power amp or tube front end for a transistor amp.


-edit- nvm i feel like a dummy now i didnt see that there were 5 harmonics there.

[pheonix358]

It is a tritanium phase coupler for a conversion inverter. Was used in reactionless drive motors prior to the use of coherent inverters.

[Globulator]

Looks like the characteristics of a rectifier tube - a new constant current source maybe?

[piano3]

I thought that Fermi energy was a characteristic of the material in question, a single number?

[Rod Coleman]

OK, my guess

Curves for Pentode connexion, for Vg1=0

Pencil Tube - "Hearing Aid" pentode, like 1AG5 etc.

[Yvesm]

Originally Posted by Sch3mat1c

Saturated diode, possibly RF noise source. I remember running across one in the ARRL tables. I don't see it in my 1971 edition, maybe it's in the '76 downstairs...

Tim

Very lo current at somewhat hi voltage