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rec.audio.tubes

Tube-based amplifiers... that go to 11

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Message 52,099 of 52,877

HpW-Works to All

Re: Differential input stage in PP tube

09 Aug 13 14:37:21

   From: nospam@nil.me   
      
   Patrick,   
      
   > Noticed an error in the MJE340 current source circuit in the first   
   > schematic. (Correct in the others.)   
      
   why do you use only one transistor. Using two would also increase the   
   output impedance....   
      
       ----------- V+   
       |       |   
       R      LOAD   
       |       |   
       |       C   
       --------B Q1   
       |       E   
       C       |   
   Q2 B--------   
       E       |   
       |       Re   
       |       |   
       ----------- GND   
      
   Hp   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)

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