What was Stan trying to show with this demo unit? 

I feel the need to set the record straight on this demo cell, after reading the post for the inductor topic. There seems to be a lot of misunderstanding of this unit out there. 

First we need to put this cell in relation to the tube cell. 
The tube cell was a mechanical unit by most sense. It uses an electric motor to turn a mechanical voltage generating alternator. 

The 8XA was a means of turning that mechanical system into an all electrical system. 

Ok so what we know about the 8XA system, is that we are locked into a frequency of 120hz. That is the primary frequency of this unit. Then we have a gate frequency that is used to turn on and off the primary frequency. 

Now this gate frequency is used to give us those unipolar pulses to the cell. It does not make step charging pulses. Now in order to get those pulses, we need to keep the gating frequency below the primary frequency of 120hz. If we go faster than 120hz, we will not see those unipolar pulses. Also in order to even see the unipolar pulses, we must isolate our scopes from earth ground. This means an isolated scope or and isolated power transformer with internal grounds cut between the input power side and output power side of the transformer. 

OK, so now we can get to the answer of the subject topic. What was the purpose of this demo cell. 

There are two things that this cell was used to show. 
Does anyone know what they are? 

The first thing we see that is different than the tube cell is that the plates were adjustable. Why? 

Most might think that it was used to adjust the cells capacitance. Wrong! It does do that, but it's not the answer. It was used to show how the spacing of the plates effects the gas output. That's all it was for. As we all know, as the plates are brought closer together, we get more gas production. 

Now what was the primary reason for the 8XA demo cell? 

It was used to prove that by restricting amps, you will get a rise in the voltage. 

This demo cell is nothing more than an amp restricting 
devise. 

Now for the biggest mistake that I see everyone making about this setup. 

THIS IS NOT A RESONATE SYSTEM!!!!!! 

Everyone is getting this system confused with Stans other systems. You can not use this cell to find resonance. The resonance systems came much later. Stan never knew about resonance when building this cell. His only goal at the time was amp restriction. No where in the documents for this unit does it ever mention resonance. 

So all the talk about matching choke coils to the capacitance of the cell doesn't apply here. Forget about it. Build the circuit and tune the gate below 120hz and it will work as advertised. 

If you haven't seen my You tube video on this circuit, check it out. My You tube channel is dynodon64. 

Also a lot of talk went into the chokes wire size and number of turns. It doesn't matter if it's 29ga or 30ga, 46 turns or 56 turns. They will all work. 

When I worked with Dave on selling the buggy, there was a lot of 29ga wire there. And I even measured the wire gauge with micrometers. So my original post were correct. As for the number of turns on the choke coil for this circuit, it was a logical guess based on the wire size and bobbin size. I couldn't very well take the bobbin apart and unwind it, it just wouldn't have been right. 

So that's my opinion of this unit base on everything I have read and seen first hand. Now I know some of you may disagree with me on some or most of this, and that's your right. I have been studying Stans work for a long time and feel I have a very good working knowledge of it. 

Any comments about this is welcomed. I hope this 
helps the newer researchers, and maybe a few of the older ones as well, get a better understanding of what this unit does. 

Hope to be posting more in the near future 

Don Gabel 

I do disagree with part of what you said. iwe all seen the tube cell working from the alternator set up. 

there was also schematics showing the use of multiple tube sets in unisen with the plate cell. i believe the purpose of that schematic was showing how to find the resonance of that assembly. 

just like tuning a radio, pick any channel to tune into to, when the capacitor and inductor are in tune with the frequency, then you get the highest Q factor which gives the strongest radio signal. this would be one form of resonance . the jhighest Q factor or resonance will out put the highest voltage. 

that's what i see. 

Thanks to everyone for the warm welcomes. I hope I can help out here with every ones 
questions and problems, and get this thing working. 

As for Max's comments about the plate cell being used with the tube cell in a document, I'm not sure I've seen that set up. But if that's the case, it's not the 8xa set up with the plate cell only, so it doesn't change my opinion on this set up. I still say it's NOT a resonant cell/setup. 

In my video of this circuit, I just used my small tube cell to show the unipolar pulses as Stan shows in the documentation of the 8XA demo cell. They are exactly the same. 

Now for Adys15 remarks. Your not going to be able to use the 8XA circuit to get any cell to resonate. If you are familiar with an SCR, once it's turned on by an input pulse, it stays on. It doesn't turn back off when the input pulse terminates. It will only shut off when the input voltage drops below the SCR activation point. This means that the voltage from the variac needs to drop off, then and only then will it turn off. The reason the SCR turns off now, is because of the 120hz unipolar pulses from the variac, drops to 0 volts between pulses. So when the gate pulse turns on the SCR, it stays on until the gate pulse goes to it's off time, then when the next 120hz pulse goes to 0 volts, the SCR can now turn off because there is no gate pulse on the input to keep it turned on. I hope this makes sense. 

So if you try to tune the gate pulse frequency higher than 120hz, the SCR won't turn off, until both signals are in the off state. So you end up seeing all kinds of funny signals on a scope. 

Also the plate cell only shows amp restriction at a given voltage. The voltage of the cell still matches the voltage from the veriac. It only restricts amps. I never said that the voltage will climb when restricting amps. It just restricts amps. 

As for the tube cell output claims that Stan makes, they have been proven to be in error. 

Hope this helps out with the understanding of this setup. 

first of all, I want to say all opinions are greatly appreciated, and should be listened to. 

what I see in my experiments are this......with the 8xa circuit, the 120 hz and the inductor are known parts of the formula. so replicate the inductor as close as possible, the 120 hz is fixed....so adjust the cell until the voltage raises. 

resonance can mean many things. here it will be the LC circuit between the frequency, inductor, and cell. 
many things resonate, but do not make hho. it is not a magic word....it is a too widely used word. I think 

what I believe is it never made an eruption of hho that everyone wants to see. but as don is saying, it was a test circuit that led him to better things. but when tuned correctly, I think it sheds a lot of light on everything else. 

I have seen around 2 times the voltage come out as went in. I have never seen a huge eruption of hho from it. 

the more i work on the stuff, the higher i get the voltage, the more gas flows. but simply, i have not gotten a huge eruption yet. when i do, doubt they will see me at work ever again. LOL 

you just move one tube in and out of the other. or and and subtract tube sets. move the plates...........this all increases or decreases the capacitance. thats the idea......if your frequency is fixed, at 120 hz.......you have to adjust the capacitence and or the inductance

here is what Don is talking about 
see attached............it shows the 8xa circuit. the 9xb is the driver for the opto coupler. 

you can plainly see the plate cell.