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Author Topic: Kapanadze Cousin - DALLY FREE ENERGY  (Read 6253591 times)

Offline Hoppy

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16905 on: March 21, 2017, 03:58:45 PM »
   
   Hoppy, I have completed the driver part of the circuit and would like to test it out, to that point, before adding the snubbers. Any suggestions???
 

Nick,

Once you have the 15V supply rail and signal inputs connected up, you can scope the driver outputs at pins 6/7 to ground for correct waveforms. Ensure that the supply traces are kept as short as possible to the main supply bus lines and make sure that the ceramic capacitors (pins 1/4 & 5/8) are soldered directly across the pins of the driver chips. The following zeners, mosfet gate resistors and mosfets should be mounted as close as practicable to the drivers to ensure ninimum length driver to mosfet gate trace lengths.

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16905 on: March 21, 2017, 03:58:45 PM »

Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16906 on: March 21, 2017, 05:30:02 PM »
   Hoppy I'll test the driver output and maybe post a video of that stage of the circuit.
The 15v filtered supply lines are already connected to the drivers. Not using the bipass caps, for now as I don't have them. Nor does Stalker use them on his fet driver set up.

   Magpwr: what type of cap would you recommend? Ceremic, such as ceramic disk type? Such as the ceramic 102 cap shown on Pinoy's driver.
 
   Pinoy_tech:  Thanks for sharing,
   I've downloaded all of the attachments. At least the pictures I could open. Not the others.
           NickZ

Offline Pinoy_Tech

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16907 on: March 21, 2017, 06:46:57 PM »
Nice.What kind of pcb software ?


eaglecad with plug-ins ulp & image converter + sketchup + vray.. but under skp, all components are customized.






   

Offline Pinoy_Tech

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16908 on: March 21, 2017, 06:50:05 PM »
he has a link (a dead one)  my look ahead info says it's been hacked) good luck mate ;)


dead link? might be due to your network... that storage site is a legit and develop by trusted google...

Offline Pinoy_Tech

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16909 on: March 21, 2017, 07:04:07 PM »
hi Pinoy,

Nice Pcb but why do you choose to use Green "Mylar capacitor" as a decoupling capacitor and also for the snubber instead of sticking with "ceramic capacitor".

-----------------------
Youtube:sanjev21
[size=78%]
[/size]



Nope, it's not meant for that choice. that's just there as presentation to show the spacing and approx outlook of the entire pcb once assembled.
I used to render it automatically and the software picked whatsoever the assigned component intended for the designated item, I realized that
I assigned that component into a wrong one, no time to rename and rerun again.

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16909 on: March 21, 2017, 07:04:07 PM »
Sponsored links:




Offline Pinoy_Tech

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16910 on: March 21, 2017, 07:15:24 PM »
   Hoppy I'll test the driver output and maybe post a video of that stage of the circuit.
The 15v filtered supply lines are already connected to the drivers. Not using the bipass caps, for now as I don't have them. Nor does Stalker use them on his fet driver set up.

   Magpwr: what type of cap would you recommend? Ceremic, such as ceramic disk type? Such as the ceramic 102 cap shown on Pinoy's driver.
 
   Pinoy_tech:  Thanks for sharing,
   I've downloaded all of the attachments. At least the pictures I could open. Not the others.
           NickZ


Via pc, you can open that through pdf viewer. I am using adobe acrobat 11.


pcb tnr mthd means for ironing pcb method, cttng method is a mirror view,
topsilk is an optional top guide to speedup the [size=78%]component placement during assembly. [/size]
 

Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16911 on: March 21, 2017, 11:11:17 PM »
   Pinoy:
   OK, I managed to open the PDF files.
   The main schematic is similar to the one that I posted, but is not just the same.
   Do you know of anyone actually building this device? Have you built this up yet?

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16911 on: March 21, 2017, 11:11:17 PM »
Sponsored links:




Online AlienGrey

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16912 on: March 22, 2017, 01:28:19 AM »
   Pinoy:
   OK, I managed to open the PDF files.
   The main schematic is similar to the one that I posted, but is not just the same.
   Do you know of anyone actually building this device? Have you built this up yet?
it's changed i get a download arrow now !
thanks


Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16913 on: March 22, 2017, 01:51:27 AM »
   Hoppy
   Here's a pic of my TL494, with the mosfet drivers installed.
I received the tiny drivers instead of the regular sized ones. So it was alot more work. I'll be sure to get the right ones, next time. Along with their sockets on both the TL chip as well as the driver chips sockets.
 I'm going ahead with it anyway. Here it is so far.
I'll connect it up to the scope tomorrow.


Offline TinselKoala

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16914 on: March 22, 2017, 04:26:11 AM »
The TL494 is very popular with solid-state Tesla coil builders. It can be "overclocked" to way beyond its specified maximum frequency (if you use genuine Texas Instruments manufactured version.) I've built an excellent TL494-based SSTC myself, with a high-power mosfet H-bridge to drive the primary of the TC proper. I didn't use driver chips though, I built drivers out of discrete transistor totem-pole and h-bridge current amplifiers, finally driving trifilar toroidal gate drive transformers for the high-power H-bridge feeding the primary. At the frequency I was using, the TL494 didn't produce a nice symmetrical signal from its two outputs so I made an inverter stage from 2n7000 mosfets that produced symmetrical push-pull from just one of the 494's outputs. Worked great. If you look for TL494 SSTC circuits you will find versions that are identical to that part of the Kap schematics you are working with.

Nick, there is a voltage-divider chain of (probably) carbon resistors in the Focus circuit of your scope. It is very common for these resistors to drift in value or even go open circuit. It is an easy fix if this is the problem, easier than changing the focus pot. You may even be able to identify the bad resistor just by close visual inspection. Be careful as this is part of the HV circuitry in your scope.

Congratulations on soldering those tiny surface-mount driver chips. I've made the same mistake, ordering SM parts instead of thru-hole, and it's a pain. Yes, definitely plan on using sockets and TH components for your next build version. Keep up the good work!

For mounting your mosfets you may like to consider using the "blue" 3-pin connectors like this:
http://rarecomponents.com/store/image/cache/data/1618-500x500.jpg
They are a perfect fit (5mm pitch) for TO-247 style mosfet pins.  I use them a lot and they are available from many vendors for cheap.

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16914 on: March 22, 2017, 04:26:11 AM »
Sponsored links:




Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16915 on: March 22, 2017, 05:08:51 AM »
    TK: 
    Yes, there are somethings that I would not do again. But I got several of the tiny mosfet driver chips, so I'll try them out. You really need pointy soldering iron tips and fine solder to do decent job on that small a chip.
   I'm waiting on some more resistors and 12v zeners for the snubbers. But I'll build up what I can until then.
   I'll see what kind of output signal I get from the tiny mosfet drivers tomorrow. 

   I don't want to risk causing any more damage to my scope until I finish the push pull driver, to see how it looks and works on the scope, before I open her up for repairs. I'll check the focus resistors. More likely than the pot, as you can tell when the pot is going out, sometimes, before it fails altogether. This happened quickly, possibly from overheating. Maybe from my fault as I left the scope covered all night long and forgot that it was still on
But I'll fix it, soon enough.
    Thanks for the suggestions.

Offline starcruiser

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16916 on: March 22, 2017, 05:34:28 PM »
@NickZ, could also be the HV from the flyback as this is a tapped output which usually provides a couple thousand volts to drive the focus grid.

Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16917 on: March 23, 2017, 02:10:58 AM »
   I just posted a new video on youtube. Please look for it under my name Nick Zec.
   I can't post a link to it.
   Showing the TL494 and mosfet drivers on the scope.
   Let me know what you think.
   Dated March 22

Offline TinselKoala

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16918 on: March 23, 2017, 06:48:50 AM »
   I just posted a new video on youtube. Please look for it under my name Nick Zec.
   I can't post a link to it.
   Showing the TL494 and mosfet drivers on the scope.
   Let me know what you think.
   Dated March 22

Why can't you post a link? I hope you don't mind if I do:
https://www.youtube.com/watch?v=TlzBKNOth94

Two comments:
First, when you adjust the Frequency pot to give more cycles on the screen you are _raising_ the frequency, not lowering it. More cycles on screen = higher frequency (for a given scope timebase setting.)
Second, when you finally connect the mosfets, you probably should use a duty cycle setting that results in a tiny "gap" between one mosfet turning Off and the other mosfet turning On. This will assure that both mosfets can't be On at the same time. If both mosfets are On at the same time, this can result in "shoot-through" which can cause component failure.

Also, you can get or make "breakout boards" or adapters that will make it much easier to use the surface-mount parts in your build.
https://learn.adafruit.com/smt-prototyping-using-breakout-pcbs/overview

And again also.... I don't remember if you have the Service Manual for your scope. If not, here's a link to the SM at my favorite Tek "fansite" :
http://w140.com/tek_2205.pdf
The resistor ladder for the Focus control is in the schematic section on page 192 of the pdf. It's kind of blurry, you may be able to find a better scan of the SM on the internet.
They are a bunch of 510k resistors in series, connected to the focus pot.

Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16919 on: March 23, 2017, 04:46:16 PM »
   TK:
   Thanks again for your comments and suggestions. They will not be overlooked.
   I do have an original Tectronix 2205 manual,  as well as a downloaded one off of the web. I also now have the service manual that you just linked to.

   I thought that the purpose of the driver chip was to assure that both mosfets don't fire at the same time. In any case, that does not seem to be a problem.
  My intension was to have all the push pull driver components on a single PCB, as well as the kacher circuit.
But I was sent the wrong size driver chip. Anyways, it's all good, and seems to be working.

  My PC is down, and I bought a new motherboard and memory for it.  So I should have it up and running in a few days, when that order gets to me. In the meantime I'm having a hard time placing links from YT. So,  thanks for placing it for me. 
  Doing things on a phone or tablet can be a pain in the butt.


   

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16919 on: March 23, 2017, 04:46:16 PM »

 

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