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Thread: Can somebody help me identify these caps?

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    Question Can somebody help me identify these caps?

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    The first one is labeled "1H 331K". The second is labeled "1H 101J"

    I want to replace them.

    How do I determine capacitance and voltage rating on these things, and what kind of cap are they??
    Attached Thumbnails Attached Thumbnails mystery-cap-1-jpg   mystery-cap-2-jpg  

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    polystyrene 330 pf and 100 pf

    Very nice for audio - perhaps the best sounding.

    331 = 33 * 10^1

    101 = 10 * 10^1

    102 would be 10 * 10^2 or 1000pf

    http://www.elecraft.com/Apps/caps.htm

    Polystyrene caps are easily messed up by solvents and heat...No acetone or long time with the soldering iron.
    In Sunny Vancouver ..... (Washington)

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    Thanks Ethan!

    So is there no voltage standard for these, and why?

    And am I correct that this would be a suitable replacement for the 100pF cap?

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    Sure those poly caps would work. You might want to consider Wima polypro caps or mouser.com offers polystyrene.

    How many do you need? Surplus Gizmos has polystyrene inhouse....
    In Sunny Vancouver ..... (Washington)

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    Mouser doesn't have the right values, at least not that I could find.

    Can you link me to the WIMA caps?

    Or Surplus Gizmos could be cool...I'll get an inventory tonight.

    Thanks!

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    Here are the mouser numbers for 100pf and 133 pf polystyrene caps - don't let that they are axial bother you.

    23PS110
    23PS133

    wima mkp2 poly caps could do well as well.

    --Ethan
    In Sunny Vancouver ..... (Washington)

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    So I just gotta bend the leads around on the axials then right?

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    Quote Originally Posted by sweetbeats View Post
    So I just gotta bend the leads around on the axials then right?

    Works for me and not all uncommon. The only trick to it is that one of the leads (on all caps) goes to the outer foil and one to the inner foil of the wined. Given the choice you want the have the long lead go to the outer foil and that goes to the most noise resistant trace/pad (hint look for a dot or some such)

    But, gosh who am I giving this info to! Forget I wrote that - don't go overboard - no no stop! Put that soldering iron down!

    In Sunny Vancouver ..... (Washington)

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    You lost me...

    Not hard to do...

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    The inventory...

    There aren't that many needed overall:

    qty (1) 27pF (i.e. 270)
    qty (1) 39pF (i.e. 390)
    qty (21) 100pF (i.e. 101)
    qty (4) 220pF (i.e. 221)
    qty (12) 330pF (i.e. 331)

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