This is it !

[cikljamas]

Gmeast, and 7imix, look at me !
I am going to say this only once : i want your diagrams, and i want them NOW!
Otherwise, i will have to introduce ME :
YouTube - imitation robert de niro and sylvester stallone

[cikljamas]

Sorry, wrong link, this is me :
YouTube - Steve Bridges Impersonates Arnold Schwarzenegger

[cikljamas]

Nooooooo, wrong link again, this is I :
YouTube - "I'm Ray Barboni from Miami"

[Farmhand]

Hi all, while I was soldering up a circuit i remembered seeing a couple of time test circuits with plugs to change the componants, so i've got some of these FDD connectors that fit a FET quite well, i'm gonna try it on a test circuit and see what happens. These ones have four wires but they have quite heafty wires so they may be ok, at least for a test setup.

The wires can be swapped around to get the colours where you want them as well, I think, havn't tried that yet



Cheers

[gmeast]

guido

Nooooooo, wrong link again, this is I :
YouTube - "I'm Ray Barboni from Miami"

Hi cikljamas,

You are very funny and I like you. I am compiling a couple of pictures and I'll try and sketch some stuff in paint ... ok?

funny man. take care. Laater

[gmeast]

gots a choke

http://02d1852.netsolhost.com/radian..._inductor0.JPG
Used the primary of a small transformer as the choke between diode and battery top. 15.81V Peak-Peak. Yellow is drain, green is battery top ... not sure what this trace is saying though.

[cikljamas]

Hi cikljamas,

You are very funny and I like you. I am compiling a couple of pictures and I'll try and sketch some stuff in paint ... ok?

funny man. take care. Laater

Hi Greg !
I am glad that you appreciate my sense of humor, and i am glad i made
you laugh, but after so hard work you needed a little bit of humor, didnt
you ?

So, waiting your paint arrangement let see how to make you even more
laugh
Maybe this one :
YouTube - Frank Caliendo Bush Impression
Enjoy !

[7imix]

Ok, here is the circuit I tested. I don't expect that the unijunction transistor will give the sharpest impulses of all the techniques, but it is easy to build, if you can find a unijunction transistor.



The transformer or coil goes as the load in the diagram (the circle with the x in it)

I will take detailed measurements and compare with my op amp oscillator soon, when I get my lab organized again.

[Farmhand]

Hi all, Well I did it, I ordered a T650-52 core paid for $117 , I also got some plain core's as well they were cheap (9.5 x 40 mm) $1.90 each I got 10, and 12 x 50 mm at $2.90 each I got two of those. I'm going to wind a secondary on my 650 so I can use it for other things as well.

I think I will wind it with 4 primaries and series connect the opposite ones in sets then use two oscillators to pulse the two primary series windings. As per the Tesla document. If I wind it that way it should work very much the same and there are more options as in pulsing the four primaries separately or series or parallel connecting them all to pulse it with one oscillator.

There are more options with four primaries and it is as tesla discovered and recommended. I could use it to convert power from a mechanically driven generator as well very efficiently I imagine.

Good job 7imix, that looks very simple and usefull.

Here's one for ya's. This if you take the driver part only, this will drive a Mosfet with variable frequency and pulse width. It is the circuit Seamonkey posted in the "Ongoing Radiant Discussion" thread. I have drawn it here as I will lay it out on the actual circuit board tonight (for a desulfator). Anyway the small cap I use is a 10nf but the original drawing calls for a 0.001uf, but that's what works for me with my particular setup.

Anyway the driver part can be used in different ways I suppose and I have experimented with success with paralleling two mosfets driven by the one driver cicuit but using one coil on each mosfet, so doubled output..

[Removed incorrect drawing will replace soon]
Cheers

Edit There is a problem with the drawing above the 4 pin should be connected to the 8,9,12 and 13 pins, sorry just picked it up. the origina l drawing in the other thread shows it i will make a much better drawing onece i have it on the board and working.

[cikljamas]

Ok, here is the circuit I tested. I don't expect that the unijunction transistor will give the sharpest impulses of all the techniques, but it is easy to build, if you can find a unijunction transistor.

Well, i just asked my old friends from one croatian forum about this unijunction
transistors and one guy gave me a few examples (2n2646, 2n1671,nte6401,
nte6409), but since he does not now for what purpose i need it, maybe you
can help me about that...Mosfet is also under question, i suppose it si not all the same what mosfet i should use ?

Edit There is a problem with the drawing above the 4 pin should be connected to the 8,9,12 and 13 pins, sorry just picked it up. the origina l drawing in the other thread shows it i will make a much better drawing onece i have it on the board and working.

Farmhand, thanks for warning !...Could you say something about your
results with this circuit ?

Cheers !

[7imix]

Well, i just asked my old friends from one croatian forum about this unijunction
transistors and one guy gave me a few examples (2n2646, 2n1671,nte6401,
nte6409), but since he does not now for what purpose i need it, maybe you
can help me about that...Mosfet is also under question, i suppose it si not all the same what mosfet i should use ?

I tried nte6401 and nte6410 unijunction, but would be interested in hearing results from others.

I used an irf510a MOSFET, but will be trying some more mosfets and would like to hear experiences with others. It's an n channel, i think enhancement mode.

The voltage I used with this circuit was about 10.7 volts.

[cikljamas]

I tried nte6401 and nte6410 unijunction, but would be interested in hearing results from others.

I used an irf510a MOSFET, but will be trying some more mosfets and would like to hear experiences with others. It's an n channel, i think enhancement mode.

The voltage I used with this circuit was about 10.7 volts.

Hi 7imix !
Now i know what to ask for when i enter an electronic store !
Thanks for your diagram and above specs ,could you maybe say
something about your results running this circuit ?
I would tell you mine yet tomorrow if i found this transistors...

Rgds !

[Farmhand]

Hi all, I've had some bad luck, I have tried two times to make the circuit I posted above, on a circuit board and failed twice, it is a bit confusing because the same circuit I made on a solderless breadboard has been working great for over a week non stop still going perfectly. However I can't seem to be able to solder one up on a board , talk about frustrating arrrrgggg.

Two times I desoldered the main componants and tried them in the solderless board, no defective parts so I must be doing something silly wrong. I'm not cut out for circuit building in miniture, I need a much bigger magnifier, and some bigger circuit boards, i've got some blanks i'll have to find out what else i need to make custom boards. I must be shorting something on the board some how.

Oh well it's all practice though i'm not so sure it's good practice to fail so many time's, I must get it right sooner or later.

It's a shame they dont make these componants a bit larger I don't like fiddling with these tiny things. To be honest i'd rather go to the dentist than sit down and do this again tonight, but i'm gonna do it and this time it will work.

Sorry for the rant but i had to blow off that steam.

Maybe I just need some eye glasses.

Cheers all

[gmeast]

better

Hi all,

OK, I got my upgrades today. The Mosfet is a logic-level device PMNSR4-30PL. It has 4.3mOhms 'on' resistance. Also got my faster Quad TLE2074IN Dip-14. I can now do sub-2usec on times from 1.8kHz to 90kHz. The Peak-Peak is 14.53V. It is important to have that Choke in there after the diode and on the way to the battery top (+). I already turned one of my earlier Mosfets into a room heater because the ringing below ground spiked it dead in the 'on' state. Now that I have seen the effect of an inductor (choke) in the charging part of the circuit, I can say what it's for. It's to "CHOKE" the 'ringing' oscillations so nothing goes below ground to wipe stuff out and to also put it, instead, ABOVE battery top(+) so the diode can work better. It must be a tuned thing like so many of the other projects related to Tesla's genius. So there is the right choke for any target frequency you're shooting for.

When I fried that Mosfet (above), the battery got slammed down to about 12.54VDC and stayed right there for better than a day after I disconnected it from the accident. It's been climbing all day and is now at 12.68V. When I disconnect it, the voltage slumps and stays, so I know it's NOT a "chemical recovery".

I'm going to make a minor modification to my Op-Amp based PWM to streamline it somewhat. Since I'm using a logic-level Mosfet, the only thing needed is a triangle wave with offset, gain and frequency control. Everything is practically already there to do this. This eliminates the second comparator and the overhead associated with it.

At present, Mosfet, Quad Amp and Inductors are remaining 'stone cold'.

I won't make any real progress until I am using toroidal coils and a toroidal choke. So maybe that will be my Christmas present from Santa.

peace out.

[gmeast]

plug

Hi all, while I was soldering up a circuit i remembered seeing a couple of time test circuits with plugs to change the componants, so i've got some of these FDD connectors that fit a FET quite well, i'm gonna try it on a test circuit and see what happens. These ones have four wires but they have quite heafty wires so they may be ok, at least for a test setup.

The wires can be swapped around to get the colours where you want them as well, I think, havn't tried that yet



Cheers

Well I found a box of stuff and in it I had stored cables, harnesses, adapters, etc and I also had a couple of PC power supply harnesses with mucho FDD power plugs.

You're right ... perfect fit for TO-220. Thanks for posting it. I already lost a couple of fets to messy wiring ...

Thanks, it is a real help