Kapanadze Cousin - DALLY FREE ENERGY

[NickZ]

  Here is a close up picture of my crt.
  Yes, I plan on replacing all the diodes and resistors with new heftier ones. As well as replacing the two fets with two brand new Mosfets, which I still have on hand.
Also mounting the fets on big heatsinks, etz... But, somehow I doubt that will solve the heating issue. In anycase, I'll give it a go. I just think that the Mazilli as is, is a Joule Hog.
  Maybe using a spark gap would help, if I can't get the parts for the nano crts.
   

[starcruiser]

I am not being critical here so please don't take it that way. I think some of the heating is most likely due to the cold solder joints. I would suggest you clean up the solder work, use a bit of flux and a hot iron, this will reduce the heating a bit.

[Hoppy]

  Here is a close up picture of my crt.
  Yes, I plan on replacing all the diodes and resistors with new heftier ones. As well as replacing the two fets with two brand new Mosfets, which I still have on hand.
Also mounting the fets on big heatsinks, etz... But, somehow I doubt that will solve the heating issue. In anycase, I'll give it a go. I just think that the Mazilli as is, is a Joule Hog.
  Maybe using a spark gap would help, if I can't get the parts for the nano crts.

Nick,

Thanks for posting a close-up of your circuit.

My immediate observation is that you have some nasty looking 'dry' solder joints which will not be helping your circuit to work effectively. Its important when you re-build to ensure that all your component leads are clean and free of any oxide layer and that you use a good quality multi-core solder designed for electronic circuits. Mount your mosfets centrally on their heat-sinks and ensure that the surface of the heat-sinks is not badly scratched where the mosfets are to be mounted. Also, try to shorten all component interconnections as much as possible, using a symmetrical layout.

Please note that none of the three circuit elements posted by Geo are nano pulse circuits.

[Grumage]

With respect Guy's.

That looks more like oxidisation to me. If I am correct, Nick has told us on many occasions that he suffers with very high humidity and a coastal location. Certain death for just about anything metal !!

My two penneth !! 

Cheers Grum.

[itsu]

OR, Itsu, or anyone else that has that crt up and running and can attach some bulbs onto it to test with.

Nick,  i do have the Mazzilli circuit still as i also used it on the Leader Genie replication.
Also the roundcore (yoke) was still there, so i setup a quick video to show you how it behaves when running 550w of halogene bulbs.
Nothing really heats up now when using 12V 21AH (3 12V batteries parallel), pulling about 3Amp.

Guess Hoppy was right that in my case the low AH battery used before was causing the circuit to go into some kind of oscillation (voltage sagging) causing excessive
heating of the MOSFETs

The screenshot below shows the voltage / current across the output bulbs:

yellow = voltage across the bulbs 37.7V RMS
Green = current to the bulbs (using my current probe which was set at 1A/div., meaning the written value has to be taken times 100 = 913mA RMS)
Red    = math function ch1 * ch4, so representing the wattage (also this value needs to be taken times 100 due to the current probe setting, so 31W)

Output power into the bulbs was 31W,  input is 12.5 * 3 = 37.5W

Video here: https://www.youtube.com/watch?v=2OA_lN99RNE&feature=youtu.be

Hope it helps, regards Itsu