Akula0083 Light No3 - Dual TL494

[d3x0r]

Hello JohnnBlade
transistors BC / p-n-p / , on picture "Image" are drawn wrong.
Emitter can not be connected on minus / ground /.


regards

ya; should be npn; so the arrow on the leg is backwards?

[Jeg]

Btw, if i connect the D6 diode the reverse ringing goes away

So first fix the circuit without that D6, the reverse ringing shows also when loading load to the output, but for simple sake dont hook up any load to the output of the ferrite, and first get the same ringing pattern to comfirm this circuit.

Thnx!

Greets JB

Remarkable job JB! Thanks for everything! Your efforts and results inspires us too! 

[Vortex1]

ya; should be npn; so the arrow on the leg is backwards?

No should remain pnp, just reverse C-E connections. This is a standard Miller clamp.

Also ground wire needed on source of lower FET.

[JohnnBlade]

This is right! Also, and importantly, one must take note of the Difference between Differential Negative Resistance and True Negative Resistance

Differential Negative Resistance: Current Never goes to or below Zero. Non Linear in its appearance.
True Negative Resistance: Current will go below Zero and theoretically can go well below Zero the more Current Drawn. Theorised to be Linear with Current Draw.

I did no see any signs of Negative Resistance in your scope shots.

Don't mix the two as they are quite obviously not the same and in fact not even similar! Its a confusing situation because most people, even scientists don't know the difference!

All the Best

  Chris

You are right, cause i have done so many tests and all i can say is that this reverse ringing does not do anything special, besides looking good.

If i change the frequency of ic2 lower the reverse ringing only gets longer and longer, but nothing special.

It doesnt even help with boosting the circuit. Like i said this reverse ringing aint doing anything.

Only amps go a little bit down when connecting the feed back circuit.

But i will keep on trying different setups

Greets JB

[JohnnBlade]

Hello JohnnBlade
transistors BC / p-n-p / , on picture "Image" are drawn wrong.
Emitter can not be connected on minus / ground /.


regards

Thnx for the correction, but i figured that yall would understand, i wanted to use LTSpice for drawing but i did not feel like cause i had to look for all components, so drawing it seemed faster.

Thnx,

Greets JB