Kapanadze Cousin - DALLY FREE ENERGY

[Hoppy]

I am still wondering why PWM is a desired strategy here at all. The TL494 is a very popular chip among solid-state Tesla coil builders even today but it's seldom used as a PWM driver; rather, people use it to make the basic squarewave pulse at the desired resonant frequency, to drive a mosfet bridge ( with a proper gate driver between) which feeds the TC primary. My TinselKoil II uses this strategy very effectively. The 494 isn't able to meet the high frequency demands of a small TC though, but the genuine Texas Instruments TL494 can be made to work at much higher frequencies than it is "officially" rated for.

I think its just because the TL494 has been shown on most of the Russian schematics and the challenge has been to replicate as shown or at least as close as possible to the schematics. However, as you rightly say, the PLL approach is more elegant and a better approach.

[NickZ]

   TK: 19 divided by 0.000008= 2.375Mhz  Correct?

    Sorry about the bad scope shots, I'll do it again.  I took the pics down, and I'll replace them with new ones.
 
    There also seams to be better and worse frequency levels for my Kacher circuit to run at. But, I'd like to get back seeing the 3mm streamers, and HF stinging, that I had observe previously.
 
   

[NickZ]

  Magpwr:
  What, are you getting off on insulting me, again, with your "old dog new tricks" bit?
  What new tricks. I haven't see anything that is OU, self running, or even close to it, from any of your "new tricks", as yet.
  Every comment I've heard from you towards what I'm doing is an insult. You feel good now?
  Why don't you just SHOW us what you've got going that is so trick, so new and exciting. I can't wait... but I won't hold my breath.
 
  Do you think that you're telling me something that I don't know, after I've been working for over a year with the Mazilli circuit.
                                                                                                                                                                           Old dog.

   

[John.K1]

Thanks TK,

I do sometimes measure the resonance as you say, just couple turns of wire around measured device. I only do not use the resistors as you suggest- I probably should.

Yesterday I just decided to give it a try as seen on Akula's channel and logically it should work -and I decided to test it using FTT.

My cap coil is actually two aluminium foils forming capacitor on the 40mm tube - but connected as a Tesla bi-fillar coil. In other words it is Tesla bi-fillar  coil made of aluminium foils (around 7 turns).

I have measured it now as you suggested and I have still the same result. What ever signal I use FTT shows the harmonics of the pitch of given frequency. Isn't it weird?   

[AlienGrey]

Nickz    Not TK but your sum is right !  TK: 19 divided by 0.000008= 2.375Mhz  Correct?

yeah 2.375 mhz or   2,375khz or 2,375,000.0 hz