Ok, If I have 38khz coming out of the flyback, and I have the induction in henry's of my primary. Then what again is the calculation for the cap farads I need?

That calculator will not allow me to enter 38khz in it. It only allows me to enter the induction and the capacitance to give me frequency. Am I correct in saying that if I have a parallel spark gap it will not fire unless I have resonance between the fly back and the primary? If thats so then please refer to my post #293. I can't go that low. So my spark gap will never fire if my coil primary resonance is 400khz and my flyback is coming at 38khz. Lol, maybe I'm just beyond confused.

Sorry, calc does give cap value, my L is 37.7 micro henry's so it says I need a cap that is 4.74e+5 pico farads in order to get a resonance of 38khz. So, back to the I don't have a big enough capacitor problem.

I didn't have resonance between flyback and primary. I had resonance between primary and secondary. And with a series spark gap, it doesn't matter how you charge the cap, the coil won't be taking all the energy. I charged the cap with a 5khz pulse from the flyback.

But I thought you said:

I don't want underunity

zilano,

Ok, will add that to the list of things to try. Thank you

Yeah

Only ferrite rods I have laying around are 1 inch long and 6mm in diameter. Lol, Can I tape them in one long rod?

Also I have a TON of coils and time. Would this scenerio work:

A 5khz train from the flyback to a 1:1 Air core (series spark gap) to a Step Down Air core (parallel spark gap). All coils in resonance except flyback?

I will also try old setup with ferrite if taping 1inch rods together will work. I just don't have everything I need so I'm trying to make due.

zilano,

Seriously though, thanks for all your help. I really appreciate it

Thanks Drak. HV, HC & HF circuits are another world vs conventional 60hz circuits (reading Zilano's early posts on RL circuits at HF...Wow). The "skin effect" of the conductors at 35khz and the 4kv high voltage really limits our choses of wire types.

I will try out some stranded HV neon sign wire for my primary. Hopefully it will work. Not much info on what Kapanadze used but there was a closeup of his sparkgap that showed blue NST wires that was matched his primary blue colored coil.



Selfrunning Free Energy devices up to 5 KW from Tariel Kapanadze

Cheers Mike

Yes, that flat plate spiral coil would make lots of amps for output in the "reverse tesla coil" design

But the secondary inside coil wire looks like standard 30 guage mag wire and could not take 4kv input from the NST due to insulation breakdown voltage?



Cheers Mike

Hi Drak

I like your primary 22 gauge coil being spaced far enough from each other so as not to arc across each other from the 4kv NST input



So the secondary coil is 5 CW and 5 CCW with center tap, or just 10 turns one way if not doing the CW/CCW method?

Cheers Mike

Hi Zilano,

Am just getting all the coils , caps, Sg's etc together and am having trouble finding High Voltage Diodes . I had some old micro wave oven diodes kicking around here someplace, if I can find them again. Will these MO diodes work --These diodes are rated at 12kv and 550ma? --I'm afraid that the current rating might be too low though. What do you think? -I'll be using also a 9v dc neon tube transformer modual out of an old neon sign from a bar that was shaped like a Martini glass --I'm guestimating that it will put out , maybe 3kv -judging by the length of the neon tube and the spark length.
Thanks again for all the valuable info you have given us and am looking forward to trying this out soon.---Paul

Mike,

if my spark gap is shorter then the spacing on the wire turns it self then there is no possible way it could spark. plus the enamel covering on the mag wire helps a little too.
And that coil is just for tests, no OU with it yet, so don't copy it and think it is the proper way to do it. I guess what Zilano means by bifilar is two coils wound opposite directions sitting next to each other.

Paul,

Diodes can be strung in series to give you higher voltage. If you do them in parallel then you get higher amps. Do both and you got a nice high voltage higher amp diode.

Hi Drak

Thanks for the info. Zilano posted that bifilar coil design which showed the coils are spaced apart from the center and wound CW/CCW to the ends.

On another note, if we feed 4000 volts ac into a coil with 80 turns = 50 volts per turn

Does that mean the insulation on the coil wire only needs to be insulated to 50 volts?

Cheers Mike

My intuitive answer would be you are correct. But I'm no expert in transformers by any means so I can't answer that.

Reading up on TC it looks like that formula is correct.

Here is some info on comparing different HF conductors used for TC's:

Experiment to compare the AC resistance of primary inductors.
Primary AC resistance measurements



Cheers Mike

Hi Zilano

Thank you for the explanation. What wire size have you found that works in your 80 turn primary coil? Windings/turns per inch?

Cheers Mike

Hi Zilano

Interesting design. 7 turns primary and 20 turns secondary. What is the input voltage to the thick primary coil? Output voltage from secondary?

Cheers Mike

Thanks

He! Thats my coil

I'm waiting for caps to connect my nst and to resonate the primary the turns and length counts for 1/4th so the sec should get a harmonic freq and also resonate.

Currently i've used 3v input dc from pulse gen. and on resonance a led burns up bright But thats on the coils itself in the mhz.

Br,
Webmug

Lol! tnx...

My setup is using 12V 9Ahr lead accid battery with an inverter to 110V max 150Watt and with a neon dimmer i can turn my NST to max 9KV 30mAmps output.

But that maximum not needed I guess otherwise i will burn out my caps because of max amps that is going to swing through the cap and primairy coil.

I will also try to use a sparkgap in parallel of the tank circuit, because de tank also needs to be on resonance i can try sparkgap but also use a surgearrestor/lightingarrestor to limit the power, max amps will flow through primairy tank with both setups.

For the secondary side i'm not sure what to use yet, a parallel sparkgap and a tank to resonate through a isolation transformer i guess, and thats then also possible with surgearrestor/lightingarrestor.

But I think I'm needed to make al large primary also otherwise i't is to much power, i'm always searching for big isolation stepdown transformers but they are not so common so step down in this coil setup is safer to do and to test.

br,
Webmug

Hi,
I am following the work of this guy from Russia, he is doing some interesting work based on D. Smith devices. His channel on YouTube :TheDynatron's Channel - YouTube shows some big current on output with heavy loads plugged with only a 100w switching supply as source. He is publishing and sharing advances and information on this forum: Donald L. Smith, unfortunately is in russian so Google translation is not a great help but it seems that he is doing a very good work. You can find more than 2 hours long videos about his work. I enclose a google translated pdf with the first part of instructions for replication published by him.
At least, someone that wants to share his work , get results and try to improve without hidden magical ingredients. The last 4 pages of the thread have a lot of information.

Attached Images

DYNATRON INSTRUCTIONS (1).pdf (364.4 KB, 208 views)

Hi Zilano

The 16mm thick secondary is a nice size to pickup lots of amps. What amp and volts does it output?

Cheers Mike

Hi Zilano

Very nice

Is the 16mm a flat ribbon similar to this spiral design or is a 16mm copper tube?



Cheers Mike

Very nice, 2mm primary windings to 16mm secondary

Do you lower your 30khz frequency after the 5 turn bifilar secondary, 30khz to 50hz? Or before?

How do you measure your modified 4kv NST output frequency of 35khz?

Cheers Mike

@Zilano

Eighty turns at 2" produces a wire length of about 42'. Five turns of 3" produce a length of about 4'. That disagrees with your statement about the secondary needing to be 1/4 of the length of the primary.

Please explain.

Hi Zilano

So you lower the voltage after the spark gap? Do you have a schematic on this setup?

How do you do the resonate between the NST and the air core primary at such low voltage? We needed the 4kv to jump the spark gap.

Cheers Mike

Hi Zilano

Thank you for the clarification. Do you also downgrade the frequency from 30khz to 50hz after the secondary? Or before the primary?

Cheers Mike

Hi Zilano

Very nice

So your R acts like a high bandwidth filter and low bandwidth filter and allows only 50hz to the 1:1 isolation transformer?

Is there a program that can calculate the R values?

Cheers Mike

Ah, okay thanks

Yeah, Don also mentioned that in one of his lectures. Surprised that this is not common knowledge with an online calculator. There are online calculators for everything else LOL

Cheers Mike