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• RE: 600v secondary/12.5 uf capacitor input/2000 piv bridge rectifier. Do I need soft start? - wheezer 07:53:53 09/20/14 (0)
  In Reply to: RE: 600v secondary/12.5 uf capacitor input/2000 piv bridge rectifier. Do I need soft start? posted by Iczerman on September 19, 2014 at 12:25:24

  What's the topology of the amp?

  Soft start is up to you. With 12.5 as C1, the inrush is low and probably not experience reactive loading.
  I would, at the very least put some NTC thermistors in there. Especially for the heater supply.
  
  

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  Edits: 09/20/14
• RE: 600v secondary/12.5 uf capacitor input/2000 piv bridge rectifier. Do I need soft start? - Chip647 14:51:37 09/19/14 (2)
  In Reply to: RE: 600v secondary/12.5 uf capacitor input/2000 piv bridge rectifier. Do I need soft start? posted by Iczerman on September 19, 2014 at 12:25:24

  What is the rest of your filter?
  The first cap into a small choke with 500 uf after it is different than using a big choke and 40uf. Sim it in PSUII and it will show you the inrush.
  

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  • It's a C-L-C-L-C..... - Iczerman 14:55:14 09/19/14 (1)
    In Reply to: RE: 600v secondary/12.5 uf capacitor input/2000 piv bridge rectifier. Do I need soft start? posted by Chip647 on September 19, 2014 at 14:51:37

    12.5 uf -4H- 12.5uf -4H- 12.5uf .
    

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    • That will be fine. (nt) - Chip647 20:02:29 09/19/14 (0)
      In Reply to: RE: It's a C-L-C-L-C..... posted by Iczerman on September 19, 2014 at 14:55:14

      
      

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• not needed (nt) - gusser 12:39:46 09/19/14 (0)
  In Reply to: RE: 600v secondary/12.5 uf capacitor input/2000 piv bridge rectifier. Do I need soft start? posted by Iczerman on September 19, 2014 at 12:25:24

  a
  

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• RE: 600v secondary/12.5 uf capacitor input/2000 piv bridge rectifier. Do I need soft start? - Michael Samra 12:38:30 09/19/14 (0)
  In Reply to: RE: 600v secondary/12.5 uf capacitor input/2000 piv bridge rectifier. Do I need soft start? posted by Iczerman on September 19, 2014 at 12:25:24

  I would definitely use a soft start or in rush limiters...The other option would be to use a GZ34 or a pair of them as they slowly bring up the B+ being they are indirectly heated.
  
  Honest amplification is better than excessive 2nd order distortion anytime.
  
  
  

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