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Crate Vintage Club 60 PT

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  • Crate Vintage Club 60 PT

    My buddy and I have had this Crate VT60 for a while and its just been sitting in our practice space for the whole time. His brother in law picked it up somewhere and then found out it has a bad transformer. I don't know where he got that info, but it seems to be a common problem for these. I've seen that you can get a replacement for around $200, but the amp is not worth that much to me. I'm just going to turn it into a cabinet if the $200 transformer is the only option. I just wanted to pop in here and see if anyone had any alternate thoughts or ideas on this. I've heard that sometimes its not the PT but some diodes, but I don't really know how to check that. Thanks!

  • #2
    The first thing I'd do would be to test the transformer and verify that it is bad. You wouldn't want to spend $200 on something you don't need.
    "Yeah, well, you know, that's just, like, your opinion, man."

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    • #3
      Please find and post schematic.
      - Own Opinions Only -

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      • #4
        Here ya go.

        VC60.pdf
        Attached Files
        "Yeah, well, you know, that's just, like, your opinion, man."

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        • #5
          FIND OUT what is wrong with it, don't assume it is a transformer with zero evidence for that.

          There are plenty of non-technical people out there who just assume any time an amp doesn't work, it must be a transformer. I think "transformer" is the only tech word they know.
          Education is what you're left with after you have forgotten what you have learned.

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          • #6
            I miss the ground connection of the HV -CT.
            - Own Opinions Only -

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            • #7
              I just brought it home late last night. Its been sitting in a corner for a few years. I haven't had a chance to test anything yet. Just going off what I was told so far. I'll check the transformer tonight.

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              • #8
                Originally posted by Helmholtz View Post
                I miss the ground connection of the HV -CT.
                You are right, but itīs a drawing error, it is certainly there and connected to power supply ground.
                Juan Manuel Fahey

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                • #9
                  I took the amp apart last night and immediately saw that one of the 2 larger tube sockets had burn marks on it. I don't know what voltages I should be seeing on the power transformer to test for. I realized after taking it apart that I am an idiot and I didn't plug it in beforehand to see what it was doing. I had a long time ago but I can't remember what it did. Got trigger happy with my screwdriver I guess. I'm going to put it back together and see what it does if I plug it in and hook up a guitar to it. I don't know much at all about tubes and tube amps. If there is a burnt tube, will there be no sound or just bad sound?

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                  • #10
                    I assume you are familiar with high voltage safety precautions.

                    Pull power tubes, check for correct mains fuse and turn on. If it doesn't blow the fuse fuse, measure heater voltage between H1 and H2 (J32/J34).
                    Nominal value is 6.3VAC +/-5%.
                    Last edited by Helmholtz; 09-17-2020, 06:05 PM.
                    - Own Opinions Only -

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