how do i calculate the bias piont

Discussion in 'General Electronics Chat' started by kl2mcbride, May 10, 2014.

  1. kl2mcbride

    Thread Starter New Member

    Apr 29, 2014
    8
    0
    Hello Thought I'd throw this out again. does anybody or can anybody out there direct or explain to me how to set the bias point on a voltage tube amplifier stage that is configured in local feedback. (on the plate load chart/graph) where the Grid resistor instead of going to ground connects to a node between a resistorRk1 and Rk2 where Rk1 connects to the cathode Rk2 connects to ground. And how this feed back works. Thanx
     
  2. winnipeg7777

    New Member

    May 8, 2014
    2
    0
    could you diagram that for me?
     
  3. #12

    Expert

    Nov 30, 2010
    16,248
    6,745
    R1 sets the idle current just like when it's the only resistor. R2 just develops more voltage but doesn't affect the tube (unless you run out of plate voltage).
     
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