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What Caps?

Discussion in 'Electronic Repair' started by ricardo, Feb 24, 2004.

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  1. ricardo

    ricardo Guest

    Hi,

    Got a axial capacitor of 23VAC, 3.3microFarad X11, bipolar- GPF by WEGO
    ELKO glatt W. Germany. Measured D=10mm L=25mm and used in a M/Benz car
    rear speaker system for the tweeters.

    Requesting help on sourcing a replacement parts for it. Could a normal
    electrolytic caps work as well though has polarity to it.

    Any insight and or leads is greatly appreciated.

    Thanks a million!

    ....ricardo
     
  2. James Sweet

    James Sweet Guest

    Nonpolar electrolytics are easy to find, you just need to look the right
    places. Try Parts Express or MCM, they both have a fair amount of audio
    stuff. Higher voltage rating is fine just so long as the capacitance is
    close.
     
  3. Stan

    Stan Guest

    }Hi,
    }
    }Got a axial capacitor of 23VAC, 3.3microFarad X11, bipolar- GPF by WEGO
    }ELKO glatt W. Germany. Measured D=10mm L=25mm and used in a M/Benz car
    }rear speaker system for the tweeters.
    }
    }Requesting help on sourcing a replacement parts for it. Could a normal
    }electrolytic caps work as well though has polarity to it.

    IIRC, you can use two polarized caps (each TWICE the target value) wired
    series back to back to replace an AC capacitor like thus:

    ------|(-----)|-----
    + - - +
    6 mf 6mf

    (to replace a 3mf ac cap)

    Someone coreect me if I'm mistaken.

    Stan.
     
  4. tempus fugit

    tempus fugit Guest

    You need to use 2 polarized caps in series (as another poster pointed out)
    or a single bipolar for crossovers (I can;t remember why though - anyone?)
     
  5. Tim Marcus

    Tim Marcus Guest

    I would think about replacing this with a polypropelene cap -
    electrolytics sound pretty bad, and shame on Mercedes for using them
    in their crossovers - Tim
     
  6. ricardo

    ricardo Guest

    Thank You to James and Stan for the inputs. I finally got hold of NTE
    website and found they do have a NPA series (Non Polar Axial) type of
    caps. I will check them out tomorrow with the local distributors!

    Thanks a million to you both! ;-))

    Have a pleasant day!

    ....ricardo
     
  7. Jerry G.

    Jerry G. Guest

    You can easily find non polar caps at most electronic suppliers. You will
    not easily find 23 Volts. You can use a 25 volt or higher rated for the
    voltage.

    Another solution is to take 2 of 6 uF / 25 V standard caps and put them
    back to back. Put the two minus sides together. I personally would use 2
    of 10 uF / 25 V back to back, because when doing this there may be some
    loss, and the 10 uF is a common value that you will find. The precision is
    not very critical. Most of these caps have a 20% average tolerance for their
    microfarad rating.

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    =========================================
    WebPage http://www.zoom-one.com
    Electronics http://www.zoom-one.com/electron.htm
    =========================================


    Hi,

    Got a axial capacitor of 23VAC, 3.3microFarad X11, bipolar- GPF by WEGO
    ELKO glatt W. Germany. Measured D=10mm L=25mm and used in a M/Benz car
    rear speaker system for the tweeters.

    Requesting help on sourcing a replacement parts for it. Could a normal
    electrolytic caps work as well though has polarity to it.

    Any insight and or leads is greatly appreciated.

    Thanks a million!

    ....ricardo
     
  8. ricardo

    ricardo Guest

    Hello,

    Thanks to ALL for your constructive inputs. Today I manage to get a 3.3
    microFarad 100V(!?) Non-Polar (non branded?)caps. It works! ... but felt
    that a 35V to 50V would be better suited for the circuit (frequency
    responds) in lieu of the original 23VAC. Oh well, am a happy camper
    again!;-))

    Again, thanks for all your help and advice.

    ....ricardo
     
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