Here is a 3K ohm pot from CLAROSTAT. I have a B&K 747 tube tester. This is a mutual conductance tester. I also use a Tektronix curve tracer for testing triodes. I give a number of evaluations for tubes.
Here is a 3K ohm pot from CLAROSTAT. I have a B&K 747 tube tester. This is a mutual conductance tester. I also use a Tektronix curve tracer for testing triodes. I give a number of evaluations for tubes.