Appendix Ii: Individual Tube Hour Log - VTL S-400 II series Owner's Manual

Appendix II: Individual tube hour log

This sheet may be used for logging individual tube hours if the user should require to. Note the position
number and total time on first installation of the tube. To find the amount of time that tube has been in the
amplifier for then subtract that number from the current total time.
Tube Number Total Time when tube
was Installed
1
2
3
4
5
6
7
8
9
10
11
12
S-400 Amplifier Owner's Manual
VTL
Total Time Tube has been in
use = Current Total Time –
Install Time
60