Donald Smith Devices too good to be true

[zilano]

resonance happens when two coils have same frequency or harmonic. the output trafo primary resonates 50/60 hz but output secondary doesnt. it just gets same frequency induced by induction and its not air core.

when pulsed dc is used to feed primary the secondary gets induced ac of same frequency.

zzzz

[kajunkreations]

That's what bother me all the time. I'm still not good in electronic and don't know where to place capacitors in such inverter schematic I know they should be here parallel to primary coils and they should be turned on/off sequentially because that is how this circuit works I think (push-pull ?).

This is exactly what I am driving my NST with, it is push-pull circuit. The primary can be one coil with center tap or two separate coils back to back.
The center tap remains powered + and the two coils get pulsed individually and inverted. this will give you north and south so you have AC on the secondary.

Nolan

[zilano]

That's what bother me all the time. I'm still not good in electronic and don't know where to place capacitors in such inverter schematic I know they should be here parallel to primary coils and they should be turned on/off sequentially because that is how this circuit works I think (push-pull ?).

try to learn more about induction coils. u will see how pulsed dc is used to induce ac in secondary coil.

2nd thing is when pulsed dc is fed in parallel Lc combination it oscillates at its Lc frequency. understand below


zzzz

[Garsony]

resonance happens when two coils have same frequency or harmonic. the output trafo primary resonates 50/60 hz but output secondary doesnt. it just gets same frequency induced by induction and its not air core.

when pulsed dc is used to feed primary the secondary gets induced ac of same frequency.

zzzz

So, the primary of iron core trafo must be center tap (bifilar) like kajun kreations said. is it correct?

[zilano]

So, the primary of iron core trafo must be center tap (bifilar) like kajun kreations said. is it correct?

not necessary. but if u use invertor circuit then 3 tap winding is required.

zzzz

[Garsony]

not necessary. but if u use invertor circuit then 3 tap winding is required.

zzzz

I tried 600-230v iron core transformer by using this setup, it didn't work for me. Still thinking why.

[zilano]

I tried 600-230v iron core transformer by using this setup, it didn't work for me. Still thinking why.

coz u tried iron cored for rf. try ferrite core or toroid. if u had rectified and then used dc then u can use iron cored trafo.

zzzz

[boguslaw]

try to learn more about induction coils. u will see how pulsed dc is used to induce ac in secondary coil.

2nd thing is when pulsed dc is fed in parallel Lc combination it oscillates at its Lc frequency. understand below


zzzz

I understand zilano I have just problems with electronics - how they change current path. You posted important schematic ! He he ...it's nice how simple things are the most powerful.
Every inverter can be made overunity , this is my interpretations of many sources ... not very above unity but still (depending on switched voltage level and frequency). Please join my thread about simple delamorto device which we could replicate to proof it.

[Garsony]

coz u tried iron cored for rf. try ferrite core or toroid. if u had rectified and then used dc then u can use iron cored trafo.

zzzz

[zilano]

I understand zilano I have just problems with electronics - how they change current path. You posted important schematic ! He he ...it's nice how simple things are the most powerful.
Every inverter can be made overunity , this is my interpretations of many sources ... not very above unity but still (depending on switched voltage level and frequency). Please join my thread about simple delamorto device which we could replicate to proof it.

Thanks for the invite. and here is basic learning u can start with.

Learning Circuits

this is advance All About Circuits : Video Lectures

learn about transistors Transistor Basics

transistor circuits/breadboard applications etc 101 - 200 Transistor Circuits

zzzz

[vidbid]

Trafo

Trafo. (German) transformer.

Source: GLOSSARY OF TERMS

[usu]

Hello Sergey,

I redraw your schematic(attached).
Can you please specify the red mark values.

i.e: transistor?
primary/secondary coil length/dia etc.

As seen one end of the secondary coil is directly connect to the base of the transistors, is it not blow the transistor?


Regs,
D.J

Hi,DilJalaay!

Nice design!
unfortunately you did The mistakes in the circuit.
So I understood that you are not so experienced.
In this case i'll try to paint an other circuit (more useful for starters)
What about this one(see the attachment)?
If it is clear enough I'll make a description in eng.
This circuit can work with most common transistors. Tell me please what kind of transistors do you have?
You should use transistors V= 300 ore more and I= 10A ore more.

Also you can combine them(the same transistors in parallel)

By the way.
I imagine that all it is off-topic!
Becouse only you decided to replicate it.
So I offer you to switch to private correspondence.
Is it okey?


Best regards,

Sergey.

[DilJalaay]

Thank you Sergey, now it is clear. Am going to arrange my components now. B.T.W am using 2N3055 trans, will contact you soon if i further need your help.

Regs,
D.J

[email protected]

[hiops]

Hello, Sergey!
I have approximately the same questions, why don't you answer them here with clear schematic, because your other one left a lot of questions( esp. about toroid, how its wound and connected), and I want to replicate it.

[usu]

Hi zilano!

Hi,zilano!

Nice to see(read) you again.
Can we go back to our discussion?
Did you see my video and scheme?


By the way.
Is there any other forum where you place your posts?

if you want you can answer me privately.

Best regards,

Sergey.