A strange Electronic component

Discussion in 'General Electronics Chat' started by Abdel_Rahman, Aug 11, 2016.

  1. Abdel_Rahman

    Thread Starter Member

    Jul 19, 2016
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    We have an old Induction Heater machine, It has been stop working, It has a strange electronic component which no one can specify it.
    Thanks in advance for your help
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  2. ISB123

    Well-Known Member

    May 21, 2014
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    Its a plate type capacitor?
     
  3. Abdel_Rahman

    Thread Starter Member

    Jul 19, 2016
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    Are You asking or telling, But what about ther rest of components
     
  4. ISB123

    Well-Known Member

    May 21, 2014
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    The big round blue thingy is a HV capacitor.
     
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  5. nsaspook

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  6. Abdel_Rahman

    Thread Starter Member

    Jul 19, 2016
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    and what about that cylindrical white/red thing??
     
  7. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    It is a HV capacitor, as tothers have mentioned. It is labeled 2000 pF (2 nF)
    upload_2016-8-11_17-16-12.png

    John
     
  8. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    As for that big round thing, how is it wired to the capacitor and coil?

    John
     
  9. ISB123

    Well-Known Member

    May 21, 2014
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    I guess that big round thing on the left is the PSU and metal case on right contains water pump for cooling the coils.
     
  10. Abdel_Rahman

    Thread Starter Member

    Jul 19, 2016
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    What is PSU stands for??
     
  11. ISB123

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    May 21, 2014
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    Power supply unit
     
  12. KeepItSimpleStupid

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    Mar 4, 2014
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    Since I have seen similar, I would bet it's the cooling tower for a transmitting tube.

    http://www.tubeampdoctor.com/en/sho...bes_HiFi_Triodes_Transmitting_Tubes/833C_1342

    You might find a differential pressure switch that detects cooling.

    Similar, not exact, http://www.engineeringradio.us/blog/2010/06/filament-voltage-management/

    Edit: I should not say seen, but I pretty much left one alone when I worked on the power supply. The other fell out of it's socket during shipping, so I guessed, I put hat one back in. I also felt the "no fingerprint" rule was valid.
     
    Last edited: Aug 11, 2016
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  13. KeepItSimpleStupid

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  14. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Agree, It could also be a high voltage triode as many of these older H.F. induction heaters used for an oscillator.
    The top connections could be the filament?
    Max.
     
    Last edited: Aug 12, 2016
  15. ISB123

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    Max is correct its a HV triode.
     
  16. Abdel_Rahman

    Thread Starter Member

    Jul 19, 2016
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    thanks for reply
    then is it better to be replaced by IGBTS or searching for this "triode"??
     
  17. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Probably the chances of getting an exact replacement is going to be remote.
    Is the unit not working now? If so what trouble shooting has been done?
    What is it using for rectification?
    What is the final function it performs or used for?
    Max.
     
  18. Abdel_Rahman

    Thread Starter Member

    Jul 19, 2016
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    the unit is not working, technician checked it and told us that part is not working, but no troubleshoots performed as it was a "black box" for us.
    machine is used as induction heater "specially annealing"
     
  19. recklessrog

    Member

    May 23, 2013
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    Unless you wish to prematurely remove yourself from the gene pool, I seriously suggest you leave it alone.
    The voltages that are present and the R.F energy produced should it fire up will kill or seriously burn you.
    Specialist training is required to safely work on such equipment, and without it you are likely to wind up dead!!
     
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  20. ian field

    Distinguished Member

    Oct 27, 2012
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    If its a thermionic tube, converting to solid state is pretty much a redesign from the ground up job.

    The Russians still produce plenty of transmitter type tubes - if its a triode; selecting a suitable substitute shouldn't be all that difficult.

    The lack of info from the guy that (allegedly) diagnosed it - was probably because he was too terrified to mess with the high voltage/current in a RF induction heater with enough power to anneal metal.
     
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