Do tubes wear evenly in a mark IV?

[GD_NC]

I hope this is not a stupid question but here goes...

I typically keep my Mark IV in Tweed/pentode/Class A which primarily uses the outside pair of tubes. Does it make sense to switch the tubes (yes they're all 6L6's) once and a while to even out wear? Would swapping the tube pairs improve overall tube life?

 

[topcat0399]

I hope this is not a stupid question but here goes...

I typically keep my Mark IV in Tweed/pentode/Class A which primarily uses the outside pair of tubes. Does it make sense to switch the tubes (yes they're all 6L6's) once and a while to even out wear? Would swapping the tube pairs improve overall tube life?

I run my Mark IV in the same mode as you most of the time and it seems logical to me that the outside tubes would wear faster. I'm commencing a rotation schedule starting now. Every daylight savings start and end I'm switching the tubes around.

you're a genius!

 

[topcat0399]

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[THTH]

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I tried that, but found it had no effect at all on the tubes :!:

 

[DaveP]

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That hurt my brain to read. :shock:

 

[Fronzil]

if you play mostly in Class A I would switch them..however if youre like me and run mostly simuclass with the occasional half hour here and there of class A I doubt it would matter