Tubes?

[innovation_station]

well all i just cant seam to let go of the magnets i must play more i thought i was ready for the tube but i am not

i looked at my books marco and im still looking have not found it yet but thease books are of many many pages much to read

im trying somthing new to me to see what will hapin in my next expairment im using a tuned coil 4" well i will post a picture if results are of intrest

is

[turbo]

Hi Marco.

Well, I'm not certain that the kicks you are seeing are from bemf. Could you explain your rationale here?

In regards to different currents in the same wire, I would say absolutely there can be. In fact to me, I see two distinctly different ways this may occur.

If we are dealing with similar wave forms and frequencies, then the current in a wire being sourced from both ends is simply the potential difference between the ends at any moment in time, divided by the wire impedance, assuming that the two sources exhibit zero output impedance in each. Also, this is assuming that each source is commoned at the same point i.e. their grounds are tied together.

So in this scenario, two identical sources that are perfectly in phase and amplitude, will yield zero current in the wire.

A second manner in which different currents may appear simultaneously in the same wire involves the frequency content of each source. I won't go into details, but suffice it to say that currents travel down a wire at a skin depth that is proportional to the frequency components that make up each source.

Taking an extreme example, assume one source is a 10 GHz sine wave, and the second source is a 60 Hz sine wave. Each source current could exist largely unaffected by the other because one will travel mostly on the outer skin of the wire, whereas the other source will have its current evenly distributed through the wire cross-section.

Darren

Hi Darren,
i am sorry but i still cannot see the 500VDC closed loop on the heater transformer coil.
i have been thinking about it all day and it is very confusing i canot see it inside my head.
the zero voltage line is not connected and only one of the two plates will conduct at a time, so i do not see how this can be closed looped,i can try however to measure dc voltage on the htr transformer.
if it was a closed loop we would basicly short out the high voltage on the 5VAC winding.

I do not know if you did read that someone mentioned the bemf like kicks i described were the output of the tpu, so in my opinion thats some sort of clue there.
it could be two waves traveling against each other cancelling out each other at specific area's giving rise to a huge bemf spike.
i guess this can be done in one wire aswell as a bifilair coil.

I do not know if my spikes are bemf spikes but i was thinking this because they sure look like it.

Also i have been told the skin effect is a fairytale because the electrons only travell on the outside of the conductor where the electrons can jump over because there is not an atom next to it so this is the only place where they are not bond.
inside the conductor all electrons are bond, so the only thing which differs at frequency is the space between the circulair pathways outide the conductor, or so the man explained, but i'm not sure about that either however i do can imagine that in my head.

it's just to small to take a picture  of it

Marco.

[innovation_station]

yes marco
.

i remember yesterday i was going to answer that qustion for you all but my laptop did not work i have been fighting with it for a few days now but i had that answer in plain view in my mind but i will start to think of what i was going to write yester day i nkow it made all the sence total it will come back to me must read a trigger first!!!!

i will be right back with the answer


ok guys remember the statment from sm about 5 volts ac and 500 dc  ok i think it is an expairment but i think it is an explnation more so just saying that we can have ac and dc in the same collector with no problem and only going where we want them to

ok ac say 5 v and dc say 12v into collector #1 then the dc goes to the control coils  but they both set up a mag feild in the collector on there way in then the dc controls the ac like the mag amp then they would enter the next coil combined seting up the top magfeild and the voltage would be increased in  the ac and

well i had a much better way to explain my thoughts yester day but i tryed

any how do you all here think we are ready for a public tpu?? i dont think we are

is

[z_p_e]

Marco.

About all I can say is the rectifier circuit works, and has or did fo 50 years.

In one case with the floating filament secondary, it causes the B+ output to ride up and down on this 5VAC waveform, but in the end is all filtered out.

In the case where the filament secondary has a centre-tap, the B+ output actually comes out from here, so clearly the HV rectified power goes through the filament secondary before producing an output...just as SM said himself. There is no "modulating" 5VAC on the B+ because it is a balanced circuit due to the centre-tap.

It's a simple circuit and nothing really confusing about it.

Now, in the case where the Plate transformer centre-tap is removed, this poses an odd situation, because theoretically, you should not get rectification this way.

Try this easy test. Remove the tube rect. and just use the plate transformer with the silicone diodes. Ground the centre-tap. You now have a nice FWR output yes? OK, now remove the centre-tap and see what happens on your output.

With this setup, you have totaly lost your reference and the scope (or meter) should see virtually nothing. See the graphic below.

With the tube rectifier in place, the situation should not be any different.

I would encourage you to take a step back and try the traditional circuit first and verify it all works as designed. Then begin to change things to see if you can find out what is causing these apparent kicks.

Darren

[innovation_station]

in my expairments kicks have only been created with off and on pluses weather it be a relay a mag osc a square wave gen a spark gap but those seam to be the only way i get kicks but i used a 12 v adaptor pluged into the wall so mains switch to dc i have never used pure dc batteries for any expairments

is