Akula0083 30 Watt Self Running Generator.

[havuhung]

@mrzlica,
In the meantime post printed circuit  TK beautiful, you can see the original circuit in Russia forum (Realstrannik.ru) here:
Re: Self Running Generator Akula0083 30 Watt.
«Reply # 972 on: April 27, 2014, 07:48:04 PM»

[mrzlica]

@mrzlica,
In the meantime post printed circuit  TK beautiful, you can see the original circuit in Russia forum (Realstrannik.ru) here:
Re: Self Running Generator Akula0083 30 Watt.
«Reply # 972 on: April 27, 2014, 07:48:04 PM»

Hi, Havahung
can you please post the complete link?

by, m

[alejandroguille]

Hi TinselKoala,
Yes, there will be more resources for reference and perform for circuit assembly actually run!!!  Value of C3, C4, if the value is 3 nF hard to find, because manufacturers often produce convergence 2.2nF or 2.7nF!. . Transistor VT1 and VT3 can be replaced with 2N3906 or BC547, BC557.

Because there is such a difference, what is the real?

[TinselKoala]

Hi TinselKoala,
Yes, there will be more resources for reference and perform for circuit assembly actually run!!!  Value of C3, C4, if the value is 3 nF hard to find, because manufacturers often produce convergence 2.2nF or 2.7nF!. . Transistor VT1 and VT3 can be replaced with 2N3906 or BC547, BC557.

If I don't have the exact values for the small caps, I will make up the needed capacitor values from these small high-quality barium titanate caps that I have. They look like diodes but they are solid chunks of dielectric in a glass envelope.

The schematic I am wanting to use only has one PNP transistor mosfet-cutoff, on the lower mosfet. I see other versions have this sub-circuit on both mosfets. WTF? The lower one is clearly designed to turn the mosfet off hard, which will make the largest spike in the transformator and have the largest effect on the other coils. The top 494 oscillator / mosfet driving the smallest coil doesn't have this part in the circuit I saw, and I don't know if it is supposed to go there or not. I'll be able to do it either way. The transistor crosses to ECG/NTE374, PNP silicon, Vceo -160V, Vebo 5 V, Ic 1.5A, 20 Watts, fT 140MHz, in a TO-126 package. Industrial strength. I picked up 2 at my local supplier today. But probably the much cheaper small-signal PNPs you list would work fine too .... for certain values of "work".

[TinselKoala]

Dear Tinsel Koala.

The schematic you have posted seems to make more sense to me than the one posted at the top of this page !! Am I correct in saying that the lower TL494 and it's associated components will create an inverted drive to the Mosfet ??

Pulses driven in alternation and at a different frequency will create a form of "Havoc" within the Ferrite material. Might just tempt the Genie out of his box !! 

Cheers Grum.

I don't know yet until I build it. The 494 makes two outputs, complimentary, on its own, IIRC, you can use a single one to drive a full H-bridge. It looks to me like the lower 494 is the "primary" one and the upper one is used to make a different frequency or perhaps gate the output of the first one, and mix it all up in the transformator.
From the data sheet:

The uncommitted output transistors provide either
common-emitter or emitter-follower output capability.
The TL494 device provides for push-pull or single-
ended output operation, which can be selected
through the output-control function. The architecture
of this device prohibits the possibility of either output
being pulsed twice during push-pull operation.

If I can break a ferrite core by "chaotic resonance" (tm TKLabs) with 3v at 100 mA.... that will be something! Oh wait... this is a 9V circuit. Never mind....