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  • Signs of capacitor failure?

    Hey guys, I was wondering if anyone here knew what the signs of capacitor failure were in an amp. I have a crate vintage club 30 and the clean channel developed a terrible hum and makes a wierd crackle/fuzz noise when I play certain notes. The dirt channel has none of these problems. The amp was retubed about 3 months ago if that helps.

    Thanks!

  • #2
    Leaking of any fluids

    Blackening

    Swelling (sides and/or top)

    Bulging (sides and/or top)

    Or they may look fine and still be bad or in the process of going.
    AZIMUTH
    Crank up your ****************ty speakers and cower behind a wall lest your face be stained by the flying entrails of your pathetic children.

    death metal.

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    • #3
      prolly a bad tube.
      got a question about TITAN amps? ask me
      here

      my website

      TITAN AMPS on myspace


      My band:Last Comes Gunfire

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      • #4
        I forgot to mention, I did open up the amp and look at them. I didn't notice any swelling or leaking. I guess my question would be if any of the symptoms I described above would be due to the cause of bad caps. If not is there anything else that might cause that problem?

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        • #5
          prolly a bad tube.


          I did just replace them though and even if I got a bad tube wouldn't that affect the dirty channel as well?

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          • #6
            I forgot to mention, I did open up the amp and look at them. I didn't notice any swelling or leaking. I guess my question would be if any of the symptoms I described above would be due to the cause of bad caps. If not is there anything else that might cause that problem?


            Try switching your preamp tubes around, and see if you can't get the problem to leave that specific channel and either effect another channel, or all channels.
            AZIMUTH
            Crank up your ****************ty speakers and cower behind a wall lest your face be stained by the flying entrails of your pathetic children.

            death metal.

            Comment


            • #7
              wouldn't that affect the dirty channel as well?


              I'm not sure about the preamp tube layout on that particular amp, but in most cases, tubes in the gain stage(s) are channel dedicated.
              AZIMUTH
              Crank up your ****************ty speakers and cower behind a wall lest your face be stained by the flying entrails of your pathetic children.

              death metal.

              Comment


              • #8
                ^Ok I'll give that a try tomorrow, according to the schemtaics I found for it you are correct. The tubes are channel separated. I really appreciate your help!

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                • #9
                  not caps since they are power supply and common to all channels

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                  • #10
                    I did just replace them though and even if I got a bad tube wouldn't that affect the dirty channel as well?



                    Did the problem develop after you installed the new tubes? New production tubes are not as robust as NOS, and you could have a screwed tube. Follow insurrections advice, and if you have another tube handy try it in each slot one at a time.
                    Casey4sDIY Links:102 Amphttp://www.guitarkitbuilder.com/cont...-amplifier-kitChassis Layout:http://www.guitarkitbuilder.com/cont...lifier-chassisTurret Board:http://www.guitarkitbuilder.com/cont...d-construction Tolex Tutorial:http://www.guitarkitbuilder.com/cont...lifier-cabinet

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