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.
Thanks. That sucker really pumps out the current. The curves look pretty nice at first glance though low screen voltage (190) would I suppose preclude UL or triode operation. 31V heater version is available pretty cheap...