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Finally a tube amp..!

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  • Finally a tube amp..!

    Alright folks I finally gave in and bought a used Peavey Classic 30.
    Its my first tube amp so here are some questions

    -How do I know when I should replace the tubes ?
    -Does the classic 30 require any biasing?
    I heard from some owners that I do not have to rebias the classic 30 , just pop in the tubes

    Are there any other important information about tube amps I should know about?

    Thanks

  • #2
    Re: Finally a tube amp..!

    Congrats, bro. That's an awesome sounding amp. I almost bought a used one myself, but at the time I thought I needed a new amp, so I got the Blues Jr. There were a lot of good points for both. That Classic 30 is a great amp.

    When to change the tubes? You'll know. It'll start sounding like crap...or worse.

    I'm not familiar with the biasing on it. I looked it over when I was considering buying it, but I didn't know anything about tube amps at the time, either, so that wasn't something I was concerned with. I'm sure there's some people on here that know, though.
    It's hard to be metal in girl pants.

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    • #3
      Re: Finally a tube amp..!

      You can always do the 'tap test' to see if any tubes are microphonic, turn the amp on, w/o hooking up a cord and guitar, and lightly tap on each tube with a pencil,(the eraser end) and listen to see if any of the tapping is coming thru the speakers. IF so you have a microphonic tube, which doesn't always mean the tube is bad, but it is not in spec. Unless I'm wrong, I thought I heard that the Peaveys were auto biasing, but don't take my word for that.
      Pre amp tubes do not have to be biased. only when you replace power tubes.
      " Rock and Roll IS a contact sport!"

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      • #4
        Re: Finally a tube amp..!

        Originally posted by marvar
        I thought I heard that the Peaveys were auto biasing, but don't take my word for that.
        Im pretty sure I heard that too somewhere, is anyone sure of this??

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        • #5
          Re: Finally a tube amp..!

          , but how do I actually bias my map for new Poweramp tubes? Do Marshall DSLs have to be re-biasedon tube change?

          thanks

          7ender 7anboy.

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          • #6
            Re: Finally a tube amp..!

            If you bought the Classic 30 used, head over to www.eurotubes.com and pick out a re-tube kit that suits your style. With a used amp, you have no idea of how old the tubes are. The Classic 30 is a fixed bias, so just plug and play. And enjoy! The Classic 30 is a great little amp.
            Not a 5150 Kramer, but a 5149 1/2 Shamer
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            • #7
              Re: Finally a tube amp..!

              Originally posted by Kommerzbassist
              , but how do I actually bias my map for new Poweramp tubes? Do Marshall DSLs have to be re-biasedon tube change?

              thanks
              Yes marshall dsls need to be rebiased at tube change. I suggest you just bring it to tech to rebias it. If you want to learn how to do you need to get a book about not sure which one is the good one and you need to be very safe, touching stuff in the amp can kill you. But I would just bring to a tech just to be safe.
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