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.
I have plotted the curves of a KT150 with my Sofia.
One with UL connection (V2) , the other with triode connection.
It is a very interesting tube maybe better than KT120
What's with all the wriggles and jumps in the curves?
Some are obviously due to a metering range change glitch due to defective or out of calibration shunts. Others look more like artifacts of a poor power supply.