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   sci.electronics.repair      Fixing electronic equipment      124,925 messages   

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   Message 123,062 of 124,925   
   Phil Allison to Trevor Wilson   
   Re: High Voltage OP amp   
   03 Sep 22 17:28:34   
   
   From: pallison49@gmail.com   
      
   Trevor Wilson wrote:   
   =================   
   > I am servicing a power amplifier which uses a dual, 8 pin DIP OP amp.   
   > Unfortunately, the rail Volts on the OP amp (LF353) is +/- 22 Volts.   
      
   **  That is a mistake, all versions of the Sumo 9 used nominal +/-20V rails   
   fed from series regs with 20V zeners.   
      
   > I need a suggested replacement.   
      
   ** Which MUST be a FET input op-amp.   
      
      
   > And no, it is not possible to drop the rail Voltages.   
      
   **Course it is, they are meant to be 19.5V each anyway.   
      
   > They must remain at +/-22 Volts.   
      
   ** Humbug.   
      
   .....  Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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