Kapanadze Cousin - DALLY FREE ENERGY

[Grumage]

Dear Nick.

Putting another set of diodes in parallel won't solve the overheating issue. As you will be aware the tolerance of most components can be quite large so one diode will almost always be acting earlier than another.

My best suggestion is to find a higher current/voltage or speed and substitute with the ones you're currently using.

All the best, cheers Grum.

[TinselKoala]

MUR1560

[AlienGrey]

If you think its the speed one trick to put 2 in series, 'duno' if it works but if he has them (some more old ones ) it would half the capacitance but double the depletion breakover voltage. Just a bit of usless information!

With that photo he published I could sling him some over the top of his house !

[NickZ]

  Ok guys, thanks for your comments.  I'll see if I can find some MUR460 or MUR1560 series diodes.
 
  Last night I fried both, or at least one of my last new IRFP260N fets.  Bummer! I hope to replace them soon if possible.
  The fets got 18.6 volts from a 4A laptop adapter, which was just enough to toast them, although I never felt the least amount of heat on them, at all.  I guess they don't need to get hot to short out inside. The 18v zeners were not on, as I don't have any, but I thought that the fets could handle it.  I guess not.
   

[AlienGrey]

  Ok guys, thanks for your comments.  I'll see if I can find some MUR460 or MUR1560 series diodes.
 
  Last night I fried both, or at least one of my last new IRFP260N fets.  Bummer! I hope to replace them soon if possible.
  The fets got 18.6 volts from a 4A laptop adapter, which was just enough to toast them, although I never felt the least amount of heat on them, at all.  I guess they don't need to get hot to short out inside. The 18v zeners were not on, as I don't have any, but I thought that the fets could handle it.  I guess not.

Oh well done, anyway I'm just in the process of testing my driver and grenade coil so I ran up my device using a set of 4 slow diodes like the ones you have  1N5408 (general purpose), they load up the power and get verrry, very hot !  that's your main problem. I was using some UF4007, they didn't do that ! so it is definitely the diodes.