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Ampeg BA-115 voltage cap concern

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  • Ampeg BA-115 voltage cap concern

    Hi, i want to recap my ampeg bass amp, bought in the 2000's. I am replacing the input jacks at the moment and thought i should replace BIG caps C6 / C14 4700u 50V caps while its open.
    My question is : can i replace the two caps with nichicon 4700uf 63v cap? Would the increase in voltage damage the way the amp would run? i have them on hand (63v), i would have to order 50v caps if not advisable. thank again for your help

  • #2
    A higher voltage rating of the caps has no influence on performance.
    - Own Opinions Only -

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    • #3
      i am not familiar with ampeg amps at all to know enough of how the circuit would react
      thank you

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      • #4
        Another way to think of it is, the cap's voltage rating is a "do not exceed" value.
        --
        I build and repair guitar amps
        http://amps.monkeymatic.com

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        • #5
          Originally posted by Dandrix View Post
          i am not familiar with ampeg amps at all to know enough of how the circuit would react
          thank you
          My statement above is a general one, doesn't depend on the circuit.
          - Own Opinions Only -

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          • #6
            You are not changing any voltage in the circuit, you are just using stronger parts.

            Imagine you have a step ladder rated for 200 pounds. Now you replace it with a ladder rated for 250 pounds. You don't wind up gaining 50 pounds. Same idea.
            Education is what you're left with after you have forgotten what you have learned.

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            • #7
              What you may find while browsing the distributor's available replacement capacitors for this task, is the case size may be smaller. Scaling the Parts Layout drawing, you have a max case diameter of 30mm and the Snap-In Lead spacing requirement of 10mm, which is a very common size. Advances in electrolytic capacitors over the years has resulted in smaller case size in many parts. Higher voltage ratings, as well as higher temperature ratings (105 deg C vs 85 deg C) are both improvement you can select, which will fit into your PCB.
              Last edited by nevetslab; 03-18-2020, 12:45 AM.
              Logic is an organized way of going wrong with confidence

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              • #8
                Originally posted by xtian View Post
                Another way to think of it is, the cap's voltage rating is a "do not exceed" value.
                A little confusing, I prefer 'do not go less than', the voltage rating of the original part.

                (edit: confusing in context of the original question I mean. I understand your statement and it is correct. Voltage rating must not be exceeded in circuit. Voltage rating of replacement part may exceed original)
                Last edited by g1; 03-18-2020, 09:12 PM.
                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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