SUper reverbv bias

[Underwood]

 
Hello,
I have been having a problem biasing my super reverb. I can only bias my tubes up to 38ma. I have a 470 ohm resistor in the bias circuit and have a 27K on the bias pot. What do I need to change?

[sluckey]

I can only bias my tubes up to 38ma.

If that means you would like more current then replace the 470Ω with a larger resistor (680, 820, or 1K) or replace the 27K with a smaller resistor (15K, 18K, 2K, 22K, or 24K). Use same wattage as the one you will replace.

An if you want less current, do the opposite.