Type

Height of retainer

Height of tube body

Tube examples

Mounting centers

7T-31

31mm

31±3mm

6AK5,6AL5,5654

22.5mm

2-Φ3.5mm

7T-38

38mm

40±3mm/38±3mm

6AU6,EF94,6BH6

7T-45

45mm

45±3mm

7T-55

55mm

60±3mm