Pepper
I can see your passion my friend. I remember my self for all the sleepless nights when i was thinking that i had the secret in my hands. But you know, in this job only the bench work can prove or disprove your own assumptions. The only thing you have to do is to be objective with your own experimental conclusions. By the time you will see  that OU as Void said is not something easy to be achieved, or else everyone here we would have something to demonstrate.
For me Nelson's device is the real deal, but it is just a waste of time trying to replicate a working device just by assuming how it works. Your experiments have to guide you step by step until reaching Nelson's level or else you will be lost.

Void Very sorry for your scope mate! It is one of my nightmares when thinking that my Rigol could have such a tragic end. I have already destroyed an analog one and three frequency generators until now due to high voltage. Hope your scope wasn't any expensive gear!

Cheors
What a nice surprise like plaxius's one!!! Thanks a lot for your kind gift! Arduino is a really valuable tool for every experimenter. What are the frequency ranges you are talking about?

From 1Hz to 4 MHz.

But of course, the higher the frequency the worst the resolution.
Cannot be used to find a frequency linearly.

Hoppy!!  I`m more than glad to try to give you my best shot at explanation but a will rather refer to a great experimenter that I discover and he has the best EFFECT THAT CAN BE SIMILAR TO NELSON`S SECONDARY ...   Just forget the front circuit and let`s concentrate on the output coil made  with the same arrangement as the video describe...  If this is INCONPLETE info for you, I will try my best a second time..  CHEERS!
https://www.youtube.com/watch?v=bbpso7zAlvU

Pepper,

Notice in this video from the same guy - Arkiver, he is simply overloading his source transformer to the point that the circuit breaker trips at the end of the video and he burns his figure touching it. From his dialogue, his electrical / electronic knowledge is limited and confused. As in the video you posted, he is using polarised electrolytic caps to pass AC current and then says that they are getting hot because of the transformer wire needs to be thinner  ! The videos are nonsense.

Pepper,

Notice in this video from the same guy - Arkiver, he is simply overloading his source transformer to the point that the circuit breaker trips at the end of the video and he burns his figure touching it. From his dialogue, his electrical / electronic knowledge is limited and confused. As in the video you posted, he is using polarised electrolytic caps to pass AC current and then says that they are getting hot because of the transformer wire needs to be thinner  ! The videos are nonsense.

Hoppy his caps if you look at some of his other vids the caps are none polorised 16volt variety RS do them I ordered some by mistake once for a quick job but had to re order some ordinary ones notice the large size anyway 50/60hz is a crap freq to tune! Just cus he can make vids doesn't mean he is a wiz kid

Allen

  Hoppy, Void, and all.
  Talk about waisting time and effort.  i' m done with this guy.
   I called his bluff, he ignores me.
   So, I'll ignore him too.
  Sorry, but... Well, you know... Tried to be nice.

Nick,

Relax mate. He means well, just up the creek without a paddle at the moment. You found it difficult at first with very limited electrical / electronics knowledge, so be patient with him. Hopefully he will tone down his posts and realise that he needs to start learning through building and experimenting at the bench.

Hoppy his caps if you look at some of his other vids the caps are none polorised 16volt variety RS do them I ordered some by mistake once for a quick job but had to re order some ordinary ones notice the large size anyway 50/60hz is a crap freq to tune! Just cus he can make vids doesn't mean he is a wiz kid

Allen

OK, thanks for that Alien. Its an ESR / current rating issue then.

My enhanced  PWM version for arduino (see previous Plaxius post)

A0 and A1 pots for Duty cycles 1 and 2
A3 pot for fine frequency
A2 pot for coarse frequency
A4 and A5  3 positions rotary switch for 3 frequency ranges
-----------------------------------------


//Pgm Timing vars
unsigned long previousMillis = 0; // will store last time valuse measured
unsigned long interval = 20; // interval at which to Measure values (milliseconds)
unsigned long currentMillis = 0;
long Fine, Frequency ;

//pwm vars
unsigned pwm1; // Value read from A0 to give PWM duty cycle output in terms of 0-5V
unsigned pwm2;// Value read from A1 to give PWM duty cycle output in terms of 0-5V

void setup()
{
//Set up PWM
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(A0, INPUT);
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(A3, INPUT);
  pinMode(A4, INPUT_PULLUP);
  pinMode(A5, INPUT_PULLUP);

// clock 1/1
  CLKPR = 128;
  CLKPR = 0;

//phase/frequency correct mode. SELECT THIS FOR INVERTED OUTPUTS.
  TCCR1A = _BV(COM1A1) | _BV(COM1B1) | _BV(COM1B0) ;
}

void loop()
{
 unsigned long currentMillis = millis();
 if (currentMillis - previousMillis >= interval)
  {
   previousMillis = currentMillis;

   Fine = analogRead(A2);
   Frequency = analogRead(A3);

   if (bitRead(PINC,4) == 0) // switch RANGE closed ?
    {
     TCCR1B = _BV(WGM13) | _BV(CS10) ;  /// clock 1 = high range
     ICR1 = Frequency + Fine / 10 ;
    }

   if (bitRead(PINC,5) == 0)
    {
    TCCR1B = _BV(WGM13) | _BV(CS10) | _BV(CS11); // clock 1/64 = mid range
     ICR1 = Frequency + Fine / 10 ;
    }

   if (bitRead(PINC,4) == 1 && (bitRead(PINC,5) == 1))
    {
     TCCR1B = _BV(WGM13) | _BV(CS10) | _BV(CS12);  // clock 1/1024 = low range
     ICR1 = Frequency * 10 + Fine ;
    }

   if (ICR1<= 1)
    {
     ICR1= 2;
    }
 
   pwm1 = analogRead(A0); // read duty from A0 for PWM 1
   pwm2 = analogRead(A1); // read duty from A2 for PWM 2

   OCR1A  = map(pwm1,0,1023,0,ICR1); // map the duty cycle to the available steps
   OCR1B  = map(pwm2,0,1023,0,ICR1); //map the duty cycle to the available steps

  }
}

Nice Work my Friend .... i try now Arduino Telsa with sync pushpull ...  Thanks for your code. !!!


Is more simple .. open source arduino proyect !!..