Get the tube characteristics for your design (shown above for my example). If not already on the characteristics, plot the maximum power dissipation curve (voltage * current = spec'd power).
Select a reasonable quiescent operating point for your design. Often this is described in the manufacturers typical operation. For instance, a reasonable starting point for my example would be 300 volts and 60 mA. (This is the orange "dot" on the characteristics above.) Whatever you pick MUST BE within the tube's ratings. For this example, I'll choose to ignore the manufacturers recommendation, and use 300 volts and 65 mA. Put a dot on the tube characteristics at this point. (I am expecting that the "recommended point" is somewhere near optimum, but I want to run the tube a little "hotter", perhaps gaining more power output, lower distortion, or both.)
đang được dịch, vui lòng đợi..
