Kapanadze Cousin - DALLY FREE ENERGY

[Grumage]

Dear Nick.

I have had an evening of up's and downs!! I first blew out one of my TIP 3055's and not having a replacement had to fit a couple of FET's. Now while they lasted, which was not long!! I noted that the high voltage that I had seen with earlier tests was not there anymore!! I think the internal diodes that are fitted are ruining the effect. I wonder if Verpies could shed some light here??

I am now testing with 30 turns of 22 swg ECW per limb and a couple of MJE15030 NPN power transistors and with a 0,1 nF cap am achieving nearly 200 V p/p across the input coils!!
Oh and a 10 turn secondary on a limb with a split (double frequency zone) will light a 12V 21 W bulb to probably about 3/4 bright. I need to make a 12V "Watt Box" version.

That's all for now folks!!

Cheers Grum.

[verpies]

I first blew out one of my TIP 3055's and not having a replacement had to fit a couple of FET's. Now while they lasted, which was not long!! I noted that the high voltage that I had seen with earlier tests was not there anymore!! I think the internal diodes that are fitted are ruining the effect. I wonder if Verpies could shed some light here??

Yes, these diodes make a big difference, whether they are internal MOSFET diodes or external ones as in this diagram.
The D1 & D2 diodes will protect MOSFETs' gates.  Keeping L1's inductance as large as possible will relieve the transistor stress, too. If L1 saturates due to high ampturns flowing through it, then the transistors will blow, so L1 should be huge.  You're asking for trouble if the C1 is not polypropylene - MKP or Mylar type... really.

With all these additional diodes you're dealing with a different circuit than before (see "Mazzilli") and most of Bartologous's analysis applies to it this time.

[NickZ]

  Guys:
  Ok, I've been at it today with the Royer twin Fet circuit (IRF 620) , as per Geo's diagram.
  I've just got mostly low wattage bulbs, around the house, so it's has not been possible to test higher wattage ones yet. In any case, I'm able to light a 25 watt bulb fairly nicely, and a 50 watt also, at times. The circuit is finiky still, and a lot more tuning is needed, but I have at least got it working to some degree. If at times it overheats it will shut the light off, and get very hot, real quick. I don't have it on heat sinks with a fan, yet, as this is just a preliminary test. As I could not find some of the parts that I had set aside for this build, like the 2.2 k big square ceramic resistors, as well as transistors, so, I found some other Fets, and made it like this for now. It seam to work better with the earth ground (I'm holding it, green thick outside earth ground wire), as it won't work just connected with a wire. This is a VERY  interesting circuit. That's all I can say about it for now, as it's too soon to know more.
  More information will come tomorrow, as it's late here and I couldn't sleep last night thinking about it all. Anyways, here's a couple of pictures of it. I'll do a video, when I get further along.
  Grum: Good luck on your device, I'll reply to your post tomorrow, as I've got to get some sleep...

[verpies]

The circuit is finicky still, and a lot more tuning is needed, but I have at least got it working to some degree. If at times it overheats it will shut the light off, and get very hot, real quick.

If you're using BJTs then this circuit might forgive you the lack of diodes, but it will not forgive you the small L1 which, as a rule of thumb, should have 4x more inductance than the inductance of the primary subwinding half.  L1 should be able to withstand the instantaneous currents flowing through it, without saturation.

See the Java simulation of this circuit here.

[Grumage]

Yes, these diodes make a big difference, whether they are internal MOSFET diodes or external ones as in this diagram.
The D1 & D2 diodes will protect MOSFETs' gates.  Keeping L1's inductance as large as possible will relieve the transistor stress, too. If L1 saturates due to high ampturns flowing through it, then the transistors will blow, so L1 should be huge.  You're asking for trouble if the C1 is not polypropylene - MKP or Mylar type... really.

With all these additional diodes you're dealing with a different circuit than before (see "Mazzilli") and most of Bartologous's analysis applies to it this time.

Dear Verpies.

Many thanks for the reply. It was as I thought!! The lack of diodes enhances the ringing.

I am using 2000 V rated Polypropylene caps so there should be no problem!! And I will now take your advice and add some more turns to the primary legs for the second phase of testing. I am going to try and find the Acoustic resonance of the Ferrite using a Ceramic pickup from an old record player. 

Wish me luck!!

Cheers Grum.