This type of tube is aloktal version of a6SL7GT tube. Ref: Minimum readings should be 780/780 micromhos (60%) and new tubes should test at 1300/1300 or more micromhos.
This type of tube is aloktal version of a6SL7GT tube. Ref: Minimum readings should be 780/780 micromhos (60%) and new tubes should test at 1300/1300 or more micromhos.