[Heath] IT-17 Tube Tester question

[Terry Perdue]

Does anyone recall having a problem testing 6SN7 tubes? I've tested a 
number of them, and the meter always pegs violently using the listed 
settings. I've noticed that changing the 'Type' setting to 1 (the chart 
says to use 2), gives an in-scale reading. But I have a later loose-leaf 
listing that was compiled after the roll-chart was produced, listing 
many new tubes that aren't on the roll, and it still shows type 2 for 
this tube.

Any comments? Other types found that don't test properly using the 
listed settings? Or maybe no one uses tube gear anymore...