Kapanadze Cousin - DALLY FREE ENERGY

[NickZ]

    Both pots are 50K. Resistor is 10k. Cap is ceramic 102.
   But there's something else wrong as I only get 4 volts out of the 15v regulator, and it's new, I installed it just a couple of days ago. First time that I tested it though. I can maybe run the drivers on 12v, for now.
But, I'll probably have to order more FETs, if I don't find any more good ones left around here. As it looks like I also burnt one of the two FETs, again.  Something is not right, with that, as well.

[Hoppy]

    Both pots are 50K. Resistor is 10k. Cap is ceramic 102.
   But there's something else wrong as I only get 4 volts out of the 15v regulator, and it's new, I installed it just a couple of days ago. First time that I tested it though. I can maybe run the drivers on 12v, for now.
But, I'll probably have to order more FETs, if I don't find any more good ones left around here. As it looks like I also burnt one of the two FETs, again.  Something is not right, with that, as well.

Nick,

Have you got small ceramic caps across the input and output of the 15V regulator? STMicroelectronics data sheet shows 0.33uF on input to ground and 0.1uF on output to ground.

[verpies]

STMicroelectronics data sheet shows 0.33uF on input to ground and 0.1uF on output to ground.

These caps also have ESR limits.  Without them the linear regulator can oscillate.

[NickZ]

  Hoppy:
  I've got two filter caps at both the input as well as at the output of the 15v regulator. They are the ones that are recommended by Ruslan's circuit diagram. The 1000uf and also the smaller 104J capacitors, on each side of the regulator. But, if I disconnect the output side of the regulator, I get 24v on the input of the regulator, but no voltage on the output side of the regulator. So, it's gone bad.

  Funny thing though, last night with only 4.2 volts somehow getting to the UC4420 drivers, possibly somehow through the ground side of the regulator, which was still connect up, I WAS getting a square wave signal at the drains. First time.  But, somehow connecting the drivers inputs up to 12v from a battery, I get no drain signals at the drains.
Plus now, not only are the gate signals clean, but they are back to the gates firing at the same time. And the duty cycle going to 100%. So, get that... for a learning curve to unwind.

[AlienGrey]

These caps also have ESR limits.  Without them the linear regulator can oscillate.

we always use to use 0.47 Uf Tants they were recomended by the manufactures and never vhad any trouble with instability.

with the torerroid use a 4.7 uf (Good quality) where the power goes into the coil and the driver device MosFets Sauce or Igbts emitters and keep the wires as short as possible.