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    Callins capacitor?

    Why do Callins capacitors command such a high premium?

    https://richelectronics.co.uk/produc...ow-esr-ol0382b

    What's so special about them?

    What's a good substitute?

    #2
    Re: Callins capacitor?

    "Audio" and "vintage" are the keywords. Some people think old caps sound better.

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      #3
      Re: Callins capacitor?

      maybe i should throw some old crap in a tub and bury them in the garden for 20years as an investment?

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        #4
        Re: Callins capacitor?

        They looks to be bakelite capacitors just like Roederstein's EKU.

        They are fancy and they are vintage, with a diameter really insane for a capacitance of 300uF (26mm). Maybe due to their low E.S.R. being harder to produce in a smaller diameter back in the day.

        Roederstein EK/EKUs can be found in 80s amplifiers. Desoldered some and still measuring good.


        A more than good substitute would be a Panasonic FC (I doubt that these Callins have a lower E.S.R.).

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          #5
          Re: Callins capacitor?

          Amazing how 40 year old capacitors continue to measure good.

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            #6
            Re: Callins capacitor?

            Originally posted by Don K View Post
            Amazing how 40 year old capacitors continue to measure good.
            you dont actually know that without a ripple current test and a bode-plot of the frequency response.
            not that we know the original spec.

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              #7
              Re: Callins capacitor?

              those are always shot in anything i see them in.
              just had a zenith trans oceanic where 1 was so leaky it exploded when the customer put in a set of charged nicads.
              i suspect that epoxy seal cracked with thermal cycling and they (mostly) dry out.
              they are replace on sight 1st step of restoration.
              they were junk within a few years when the radios were relatively new.

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