tube replacement?

[oh_the_blood]

i have a crate gt-500h all tube head.
i think the tubes need to be replace.
what tubes should i buy and how should i install them?
i want a nice warm clean sound by the way.
thanksss

 

[Outlaws]

I think you need to yank them out and see what is in there first. Post what what you find.

 

[oh_the_blood]

i dont wanna mess up anything, any sugestions how?

 

[Outlaws]

Well...its a head right? So pull striaght up.