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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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