Amp/Preamp Asylum

• Can you explain what you mean here, Henry? ... - andyr 05:04:15 04/30/07 (3)
  In Reply to: Actually, I hear the big culprit is extended periods of non-use, posted by HenryH on April 29, 2007 at 15:29:44:

  I can understand that if an amp hasn't been used for some months/years, it takes a period of "running in" playing music, before it sounds its best ... but I wouldn't have thought that the period of non-use actually degraded it?

  IE. after this "running in" period, the component would sound just the same as it would've, the day after it was turned off (if it hadn't been turned off!!)??

  Regards,

  Andy
  
  
  
  

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  • I've been told that using, then letting an amp sit unused for many months or years - HenryH 05:16:20 04/30/07 (2)
    In Reply to: Can you explain what you mean here, Henry? ... posted by andyr on April 30, 2007 at 05:04:15:

    is hard on the power supply caps. That is, once charged, allowing the unit to sit for extended periods is harder on it than regular routine use.
    
    I can only relate one example of this. I had an Eico tubed integrated amp that I used a bit, then stuck in a closet where it sat for several years. I brought it back out and the second time I turned it on it popped loudly after 10 minutes or so. Scared the bejeebers out of me.

    
    This was repeated several times, the last time before a tech friend of mine who immediately said it sounded like one of the PS cans arcing between sections. Having no way to determine which cap, I replaced all four as they were not expensive. That cured the popping.

    The tech said that these big caps lasted longer when properly "exercised."

    
    
    Henry

    Mushrooms are the opiate of the mooses
    
    

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    • Re: I've been told that using, then letting an amp sit unused for many months or years - KeneallyFan 09:21:46 05/07/07 (0)
      In Reply to: I've been told that using, then letting an amp sit unused for many months or years posted by HenryH on April 30, 2007 at 05:16:20:

      While it is possible for a capacitor to hold a charge for a long time, I would think that a well designed circuit would provide a discharge path for the power supply filter caps when shut off. In fact, there was at one time a FCC regulation that required televisions to utilize a bleeder resistor for this purpose.
      
      

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    • Thanks, henry ... makes sense!! nt - andyr 05:22:20 04/30/07 (0)
      In Reply to: I've been told that using, then letting an amp sit unused for many months or years posted by HenryH on April 30, 2007 at 05:16:20:

      .
      
      
      
      

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