First time changing tubes

MeTaLMeTaL
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    MeTaL
    Ok, I know this really sounds like a noob but what the heck. I've had a Mesa F50 combo for about 2 years now or so and it really is in need of a tube change. Only problem is, I don't know which tubes to buy and how to replace them. Well, I actually know that currently there are 2 6L6's GC in with a code: STR 430. When I look online to buy some, the only I seem to find are: MESA BOOGIE 6L6 GC STR440 and some color after it like: yellow, blue, red etc. Now would these work ? Also, changing the tubes is just pulling them out and pushing the new ones in right ? Just not touch the glass ?
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    Deadpulse
    Deadpulse wrote

    ^
    I thought that was true ONLY if you use Mesa brand tubes. So you can put any matched pair of Mesa tubes, be it the yellow, grey or whatever code you want, but you can't just put in a matched set of JJ's or Groove Tubes or something

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      the_emptier
      the_emptier wrote

      how do you know when you need to change tubes?

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        TREVA
        TREVA wrote

        when sound is bad.
        When they don't glow.
        A black mark inside their glasses.
        When there are some pops or strange noises.
        Several things

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          Stephy
          Stephy wrote

          I've never seen that picture!
          and thats the same shirt you have on right now.

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            Sixstringhotshot
            Sixstringhotshot wrote

            Blackface refers to the panel behind the knobs, not the diamond plated part above it, so yes, those are blackface.

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              TREVA
              TREVA wrote

              hummm I prefer blond faces :cool:

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