Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

Itsu,

What power rating are your zeners? I use 15V, 5W but faster 15V TVS diodes would be an even better choice. The gates get clobbered on a Mazilli. You could also try a couple of ferrite beads on the gate leads placed close to the mosfet but a power zener clamp should do the job.

Thanks Hoppy,

they are 5 watt zeners.
I have some ferrite beads so could try that on the gate legs, and the  power zener clamp  (2 zeners back to back) looks more sturdy.
Do they need to be fast types (TVS)?

Regards Itsu

[NickZ]

  Yes Itsu, I'm noticing similar results as what you mention.
   I don't see how this circuit would have a chance at 24 to 36 volts. But, I'll have to see what it does on the flyback/air coils RMG crt. As that might make a difference.

   I do also notice the "special" dual mode, which can produce more bulb brightness at the expense of higher amp draw/higher heating of chokes, fets, ferrite cores, and components.

  However, there is no shocking from anywhere on this circuit (cold electricity).
And, resonance tuning, to obtain that magic result, is everything here.

  Different bulbs loads also give very different results. So, it may be important to tune using 500 watts or higher loads to see anything "unusual", as even the induction cooker crt only work well with 500 to 600 watts of load, or higher.

  Here's a link to the TVS Zener diodes:
http://www.digikey.com/product-search/en/circuit-protection/tvs-diodes/655429?k=F586

  Igor has another new video that just came out yesterday, you may want to check that one out, also. He's always trying out different things.
After 268 videos, you'd think he would have hit on something special, if only by accident.

[Hoppy]

Thanks Hoppy,

they are 5 watt zeners.
I have some ferrite beads so could try that on the gate legs, and the  power zener clamp  (2 zeners back to back) looks more sturdy.
Do they need to be fast types (TVS)?

Regards Itsu

As you can see from your scope shot, its the high and fast transient 'ringing' that does the damage. The higher the capacitance of the gate junction, the more likely the junction will get zapped, especially if the gate leads are long. I mount my mosfets 'end to end' as this allows the gate crossover's to be made as short as possible. The ferrrite beads help to minimise the 'ringing' on the gate. I've had no problems using the IRFP260's when using the 5W zeners but given that TVS diodes are faster devices and its the transients that need clipping, then I would say go for the TVS diodes but this is a bit debatable because the TVS diodes can have a fairly high junction capacitance themselves.

Edit: I meant to add that using series connected back-to-back zeners or uni-directional TVS diodes will help to reduce the capacitance of the 'clamp', whilst protecting the gate in both directions.

[Grumage]

Hi Grum,

i cannot match the shown diagram with the video.
To me its looks like 2 different circuits, like where does this capacitive wire comes from/goes to?

Anyway, my guess is that you have an inductive coupling into your bulb.
The flyback is already DC (it has internal diodes), so running it through an external diode again will not add much.

And, those crocodile leads are not meant for HV, so please be carefull when using them in this situation!
Use pliers or something else to handle them

Just my 2 cents 

Regards Itsu

Dear itsu.

I can see what you are writing about so please see amended schematic below !! 

My "Capacitive coupling ??" was that loosely looped length of 3 core flex with the 13A plugtop on the end !! We tried various lengths of wire with varied results. I have not been able to try some Coax however !!

And thanks for the advice with regard to the clip leads. Been zapped several times already !!    Not a good idea for someone who has survived 2 heart attacks !!  But I think electricity runs through my veins anyway !! 

Cheers Grum.

[itsu]

Grum,

ok, that looks better, like in the video, one common ground.

My guess is that this 3 mtr wire is capacitively coupled to ground and therefor forming an parallel LCR with the filament induction of your bulb
Depending on how tight you couple the black wire to the HV it will vary the frequency and when it hit resonance of this LCR it fires up the bulb.

Something like shown in this drawing.


Who's next?


Regards Itsu