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what is it ?

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    jaxd started this thread.
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    what is it ?

    While scrapping an old amp today I came across what appears to be some kind of capacitors mounted to to heat sinks. The capacitors look like top hats and are about 2 inches in diameter and the outer part is aluminum. Does anyone have any ideas what this may be ?



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    Mechanic688's Avatar
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    Does it look anything like the top one in this pic?? If so it is a TO-3 transistor. Commonly used in/on power supplies possibly audio applications.
    TO-3 - Wikipedia, the free encyclopedia


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    Bipolar Transistor?

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    NobleMetalWorks's Avatar
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    I believe I have posted this somewhere before, it's a fairly good example of how to identify electronic parts and what they might contain.

    https://www.dropbox.com/s/4ftxfe0lp7...ation.pdf?dl=0

    Scott
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    If it is a TO-3, some of them have gold plated leads and some have a gold plated base. Worth looking at when you take it off...
    ~You have to start somewhere to get anywhere~

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    Quote Originally Posted by ScrappinRed View Post
    If it is a TO-3, some of them have gold plated leads and some have a gold plated base. Worth looking at when you take it off...
    Why do they have a Gold plated base? I don't think that it would help much with heatsinking the transistor.

    I have noticed this on SAW (standing acoustic wave) devices too, and theres no reason at all to heatsink them.
    Theres normally at least one in every CRT, but more modern ones are black resin encased.
    Very pretty things to look at if you can get inside the casing.

    And..... That LCD screen in pjost's post. They normally have full Gold plating on the board.
    I find them in lots of different appliances, microwaves, telephones, alarm clocks, photocopiers etc.

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    jaxd started this thread.
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    Thanks y'all. That is it, a bipolar capacitor. It had 18 of these in it. I didn't see any gold plating on them anywhere.



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