Tubes?

[tinu]

Lindsay,

Many thanks for the reply!
Well, yes there was a lot of soap thrown in immediately after the first post and that probably buried it.

I was just checking the specifications of 12AU7 (and 6BQ7 also). They both seem ok for a start but the power is quite small. 22mA, 330V, 3W continuous dissipation. I wonder how far they can be pulsed.  (I can?t also wait to check what I?ll get this afternoon from my tube source; I aim toward those Russian-made freaks of hundreds/thousands of watts, if I?ll be able to get any.)

Every data sheet I?ve checked seems to indicate that 12AU7 has longitudinal configuration but I can not be sure of that. I?ll dig more and hopefully someone will come helping along. Anyway, for the tubes I?ll get, I?ll throughout inspect them visually and, if necessary, I?ll even ?dissect? one.
If radial configuration, the effects will be spread around 2pi and they will probably be too feeble to be detected. Even in the case of a longitudinal configuration, there will still exist quite a large solid angle (between cathode and anode) which is not helping.

In fact, against the spreading of effects in a solid angle, if you?ll take a look at the patent I?ve copied in http://www.overunity.com/index.php/topic,3086.10/topicseen.html , Mr. Poher suggests that a longitudinal magnetic field is also necessary, mainly for selecting those electrons that have a certain longitudinal path. In my experiments, maybe not right from the first ones but surely for some of them, I?ll wind a longitudinal (and quite massive but carefully wounded) coil around the tube so a relatively powerful and uniform magnetic field forms inside.

I?d be more than excited if you?d also like to do some ?exploration?!

My efforts up to now were mainly on the theoretical side. I?m almost satisfied with the understanding I?ve got and the time has come to move forward.
I?ve conducted some very crude and un-successfully tests with the only available ?electron gun? I could find around, which was an old TV tube. While the voltage is relatively high, the current is small and the electrons usually do not have a parallel path, as they were constructively meant to hit the whole surface of the screen.  Therefore, I could not see anything unusual. However, one simple question puzzles me: why is the front (the outside) of the screen being strongly charged? After all, all the electrons inside are captured (the circuit is closed through the grid). I wonder if this is one effect of Mr. Poher?s theory or if it has a much simpler explanation?

Many thanks again,

Tinu

[innovation_station]

hello all if you are all wondering why i have not posted here it is because im not ready to go further with tubes just yet


all tubes are is a means to the end as it has been said b4 so..... i guess it is at rest right now for me

for those that want to go further with tubes check out the blocking osc for tubes using triodes if that is not it then look at a crystal osc using triodes if i find more time i will post schems for both from the old tube books i have


ist

[Bob Boyce]

Thanks for looking  in Bob.

It is my "guess" that the longitudinal resonance is what we want to use . but it is, in this case a "ring" of itself? ....Kind of a contradiction. It sure does my head in at times. Sometimes i think that I am learning.
Would it be so that in the centre of a big ring it would be less?

Do you have any insight to offer  us as to the difference between ss and tubes regarding the reason that Steven has said to use them because it is easier?

If I understand your first part correctly, yes, it is the longitudinal resonance that we seek. And yes, the center of the ring could be a null field point. It all depends upon the design of the ring(s).

As to the differences between tubes and solid state, there are a number of types of either. Some transistor chemistries are very close to tubes in their ability to deliver crisp clean amplified signals with little feedback, while most are absolutely horrible for harmonic distortion. I agree that tubes can be well suited for this type of application, due to the higher voltages involved. This has a more pronounced effect with less current. However, once a very good understanding is reached on the very nature of these energies, the requirements needed to "tap into the wheelworks of nature" can be met with either tubes or semiconductors. Either way, high voltage in the mix makes this much easier to achieve at better power densities. It just requires a difference in coil and drive methodology for low voltage vs high voltage at the controller end of things.

Bob

[Mannix]

Thanks Bob!

being a novice at energy conversion devices, your in put is appreciated.

I will keep on with my old "electron clouds". I do wish those who are using ss the best of luck.

Be sure that I may join you, after I have ridden many miles with the horse in front of the cart that has been described to us.

Darren,
Please, just because some people  are anal dont leave .

Almost every body can see that you are consistent, intelligent and an asset to this long process.

any body who has a triple tube rack up and running  please  contact me.

Lindsay

[Mannix]

United States Patent 5434536