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What kind of capacitor is this ? paper,oil, electrolytic ???

Discussion in 'Speakers' started by bob412, May 15, 2018.

  1. bob412

    bob412 Active Member

    Messages:
    232
    I pulled a couple of these from a pair of old Electrovoice loudspeakers made in the 1960's , large two way system , don't know the model , label missing . Anyway just curious as to what kind of capacitors these old loudspeakers used . If anyone is familiar please comment . Thanks
     

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  2. E-Stat

    E-Stat AK Subscriber Subscriber

    Messages:
    6,202
    Best guess is radial electrolytic.
     
  3. jdurbin1

    jdurbin1 Tandberg enthusiast Subscriber

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    San Diego
    Radial? Looks like axial to me... no guess as to what's inside it though.

    John
     
  4. Pio1980

    Pio1980 AK Member Subscriber

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    Axial non-polar elyticaps.
     
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  5. E-Stat

    E-Stat AK Subscriber Subscriber

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    Oops, your're right.
     
  6. ra.ra

    ra.ra Super Member

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    metro Boston
    Yep, a very similar cap in the center of this EV-4 crossover.

    EV-4 crossover v2.jpg
     

     

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  7. transmaster

    transmaster AK Subscriber Subscriber

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    You run into these cap’s frequently in vintage AA5 radios. It is a axial Electrolytic.
     
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  8. crispycircuit

    crispycircuit AK Subscriber Subscriber

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    1,415
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    That's a really old American electro cap, Replace it.... Caps in crossovers are NP=non polar. Mostly sold at speaker suppliers.
     
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  9. transmaster

    transmaster AK Subscriber Subscriber

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    If you want to replace the non-polarized electrolytics with the same type Parts express seems to be the best source. Most people, me included replace them with poly film type cap's. Parts Express has the Dayton line which are cheap and pretty good.

    There are not many vintage speakers, from the the 1950's and 1960's, and into the early 1970's that warrant up-scale crossover Cap's. The Daytons, Mundorf MCap EVO's, and Axon Truecaps are good. I would not spend any more. Because they are cheap replace the resistors with non inductive Mills, or Vishay Mills resistors. My experience with my Wharfdale W35 recapped with Daytons, and the Polk Monitor 10B recapped with Axon, and Sonicraft II Cap's it does make a huge improvement in the sound
     
    Last edited: May 17, 2018
  10. Blue Shadow

    Blue Shadow I gotta get me a new title

    Messages:
    20,993
    Location:
    SE PA
    Size is another data point. It is a reasonably small cap with a 20µF capacitance...this means electrolytic. The other types of caps would be significantly larger for that capacitance.
     
    Last edited: May 17, 2018
  11. blhagstrom

    blhagstrom Mad Scientist, fixer. Subscriber

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    Wax paper electrolytic.
    Probably works fine for crossover work.
     

     

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