WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
ECC88/6DJ8/6922 will do it. Somewhere around 10mA. Minimum supply (to meet the required voltage output) is around 100V, and bias will be 1V (100 ohms Rk) for +100V supply, 3V (270 ohms) for +200V. Etc.