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Marshall DSL40C Knobs?

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  • Marshall DSL40C Knobs?

    Hi all,

    I'm in the process of refurbishing a Marshall DSL40c, it had a bad bias resistor which was causing the valves to get quite upset. I've replaced the resistors and the tubes and shes a happy little amp, however, she's suffering from a lack of knobs. I ordered what I thought was the correct eight pack (PACK-00036) but when the arrived although they fit the D shafts on the pots, the indicator line is in completely the wrong place?! Is there a trick to this I've over looked? Do the early models have knobs from a different range? If anyone has an experience I'd be grateful, thanks

  • #2
    I did not know that possibility. A solution could be to try to take off the golden covers with a cutter and then reorient them.
    Maybe a sudden change in temperature can make it easier to remove them (from the freezer to a bowl with hot water). But I've never tried it.
    In olds JCM800 it is relatively easy (in fact sometimes they get lost) but the new ones seem to use a stronger glue.

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    • #3
      This site claims that this is the correct knob for the DSL40C.

      https://www.amprepairparts.com/marshallknobs.htm

      Click image for larger version

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      • #4
        There is no trick you've overlooked. Those knobs are for pots that were mounted 180 degrees from your situation, or mounted topside vs. under the board. I recently had this same problem with a red knob Fender Twin. So it's either try to reorient the covers as mentioned, or continue your search for the correct knobs.
        It's weird, because it WAS working fine.....

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        • #5
          Try a heat gun or hair dryer to melt the glue and gently pry the lid up.
          Careful, they bend easily.

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          • #6
            Originally posted by Jazz P Bass View Post
            This site claims that this is the correct knob for the DSL40C.

            https://www.amprepairparts.com/marshallknobs.htm

            [ATTACH=CONFIG]51197[/ATTACH]
            Yes, the MKDS-C shown on that page should be correct.

            Jondoe, I think instead of the PACK-00036 you need the PACK-00035
            Originally posted by Enzo
            I have a sign in my shop that says, "Never think up reasons not to check something."


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            • #7
              If you do end up having to heat them to get the caps off, instead of a heat gun I'd try placing the cap flat against a clothes iron; that will but the heat only where you want it. You could use a thin cloth to protect the surface. Sounds like they might just be the wrong knobs though.

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              • #8
                The supplier has advised that I try the PACK-0035 (as mentioned above) if those are also wrong I guess they'll be getting some gentle heat persuasion. Maybe the earlier ones are 35 and the newest at 36.

                It's never easy is it

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                • #9
                  I can confirm that the 35 pack face the right direction, which must be for the earlier models like this one

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