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Blown amp?? HELP.

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  • #1

    Blown amp?? HELP.

    So, last night I just started playing and I heard a "pop" and my amp went dead. Not totally, though I can still hear a very faint sizzle noise when I play a note.

    All the tubes seem to be fine.

    What happened?

    Is this going to be an expensive repair or something obvious that maybe I can fix myself?
    Originally Posted by IanBallard
    Rule of thumb... the more pot you have, the better your tone.
    Tags: None
  • #2
    Re: Blown amp?? HELP.

    I dont know a whole lot about tube amp problems, but id take it to someone and have them check it out.

    Hope its not a blown transformer
    2015 Knaggs Steve Stevens SSC T2
    Majik Box Doug Aldrich "Rocket Fuel"
    Majik Box Filthy Lucre

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    • #3
      Re: Blown amp?? HELP.

      More than likely a power supply problem..Bad diode maybe? Pretty common..
      Amps: 66 Fender BF Pro Reverb Combo,1973 50 Watt Marshall Head,Marshall 4x12 A/V Cab,Vox ToneLab LE,Vox VTH Valvetronix 120 Head,Vox AD 2x12 Cab,Roland Cube 20X

      Guitars: Several Stratocasters,2 Fender Telecasters,Gibson SG Standard,Tokai Love Rock Les Paul,Dean Acoustic.

      Pickups: SD SSL2,SSL5,Twangbanger,Antiquity Surfers,59N,Seth Lover N/B,Dimarzio Fred,Dimarzio VPAF N,Fender Fat 50s,Fralin SP43 Bridge,Brobucker,Antiquity Texas Hot.

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      • #4
        Re: Blown amp?? HELP.

        Any ideas how much a repair might cost? Just ballpark figures are fine. First repair I've needed so I don't have a clue.
        Originally Posted by IanBallard
        Rule of thumb... the more pot you have, the better your tone.

        Comment

        • #5
          Re: Blown amp?? HELP.

          If you live near me, I can take a look for you......
          https://www.youtube.com/watch?v=gY73mb28orM
          https://www.youtube.com/watch?v=35mZ4BAvEbg
          https://www.youtube.com/watch?v=nToonE52DG8
          https://www.youtube.com/watch?v=XMl-ddFbSF0

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          • #6
            Re: Blown amp?? HELP.

            mine made a loud pop and howl
            it was a loose tube =the pop
            cracked solder joint on tube socket =the howl
            EHD
            Just here surfing Guitar Pron
            RG2EX1 w/ SD hot-rodded pickups / RG4EXFM1 w/ Carvin S22j/b + FVN middle
            SR500 / Martin 000CE-1/Epiphone Hummingbird
            Epiphone Florentine with OEM Probuckers
            Ehdwuld branded Blue semi hollow custom with JB/Jazz
            Reptile Green Gibson Custom Studio / Aqua Dean Shire semi hollow with piezo
            Carvin Belair / Laney GC80A Acoustic Amp (a gift from Guitar Player Mag)
            GNX3000 (yea I'm a modeler)

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            • #7
              Re: Blown amp?? HELP.

              My tubes are solid, not loose. No howl, just a barely audible fizz when I hit the strings, otherwise no sound.
              Originally Posted by IanBallard
              Rule of thumb... the more pot you have, the better your tone.

              Comment

              • #8
                Re: Blown amp?? HELP.

                what amp do you have
                some have a fuse
                some a breaker/reset
                EHD
                Just here surfing Guitar Pron
                RG2EX1 w/ SD hot-rodded pickups / RG4EXFM1 w/ Carvin S22j/b + FVN middle
                SR500 / Martin 000CE-1/Epiphone Hummingbird
                Epiphone Florentine with OEM Probuckers
                Ehdwuld branded Blue semi hollow custom with JB/Jazz
                Reptile Green Gibson Custom Studio / Aqua Dean Shire semi hollow with piezo
                Carvin Belair / Laney GC80A Acoustic Amp (a gift from Guitar Player Mag)
                GNX3000 (yea I'm a modeler)

                Comment

                • #9
                  Re: Blown amp?? HELP.

                  So after my last post I noticed another thread in here by B2D ("My Boogie pooped out on me"). He seems to have had the very same problem. All of his tube were glowing normally so he thought they were ok, but several forum members recommended he check his tubes anyway. He took a good 12 AX7 out of his Marshall and found that his PI tube, I believe, was the culprit.

                  That was very interesting to me, so I decided to check mine. Sure enough, the PI was bad. All is well now. What a relief.

                  But this was a good lesson. I learned that just because the tubes are glowing like normal and there is no evidence of microphonics from tapping on them, there still can be a bad tube causing problems.

                  Thanks to all for your suggestions and those that posted ideas on B2D's thread.

                  And thanks to ZZ for the offer. It looks like I'm up and running and won't need to take you up on it though. I'll PM you.
                  Originally Posted by IanBallard
                  Rule of thumb... the more pot you have, the better your tone.

                  Comment

                  • #10
                    Re: Blown amp?? HELP.

                    Nice
                    I wanted to say it was not a blown tranny, but since I didn't know what it is I decided to play smart and not to talk

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