03-29-2015, 02:20 PM
the component values I gave were the original values.
If you use KT-88s I would change R38 and 39 to higher values. maybe 68k. the potentiometer value is flexible, you just need to make sure that you have a wide enough range, but not too wide. I would keep the potentiometer value at 25k or so. the resistor at the other side of the potentometers should probably be at least half the value of the pots if not higher. it will determine the range of swing that the bias has.
If you use KT-88s I would change R38 and 39 to higher values. maybe 68k. the potentiometer value is flexible, you just need to make sure that you have a wide enough range, but not too wide. I would keep the potentiometer value at 25k or so. the resistor at the other side of the potentometers should probably be at least half the value of the pots if not higher. it will determine the range of swing that the bias has.