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Thread: What is "coil whine" and what is that goopy stuff all over the inside of my PSU

  1. #21
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    Quote Originally Posted by mariush View Post
    It's in a sealed package... it can last months, maybe more. But once you open it, it should be used soon.

    Once applied it needs about 15-20 minutes at ambient temperature to skin over (form a hardened layer on top of applied stuff) ... it needs up to 7 days or even more for the process to be complete.
    I thought he was asking about the shelf life of the product ONCE IT'S APPLIED.

    I have seen a video of someone working on a 30 or 40 year old receiver and all of the RTV had dried up and was dripping water back onto the components.

    I'll try to find it.

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    My bad, I meant the shelf life of the unused product, once opened; I should have been clearer.

    However, now you got me worried; 'dripping water back'?

    Either way, I'll continue not to use anything on my repairs.

  3. #23
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    Quote Originally Posted by ashiekh View Post
    My bad, I meant the shelf life of the unused product, once opened; I should have been clearer.

    However, now you got me worried; 'dripping water back'?

    Either way, I'll continue not to use anything on my repairs.
    Yeah... I can't find it now... dammit...

    Anyway... one part RTV relies on the humidity in the air to cure. One part is similar to two part, except a stabilizer is added to prevent the RTV from curing. The stabilizer is water soluable and once removed, the RTV can cure. What this guy's video showed is that the RTV on his PCB had become hard and brittle. When he "cracked it open" moisture, probably trapped in there from when it was curing, seeped out.

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    Quote Originally Posted by Jon Gerow View Post
    When he "cracked it open" moisture, probably trapped in there from when it was curing, seeped out.

    You are scaring the kids...

    you are scaring ME!

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    Quote Originally Posted by ashiekh View Post
    You are scaring the kids...

    you are scaring ME!
    I'm sure it's a corner case. Think about it.... How high was the humidity when that thing was assembled? I mean... to TRAP water particles from during the curing process?? That thing had to have been assembled at a Florida beach front resort!

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    Maybe they wet it on purpose to speed things up.

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    Quote Originally Posted by ashiekh View Post
    Maybe they wet it on purpose to speed things up.
    Because: China

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    Quote Originally Posted by Jon Gerow View Post
    Because: China
    Careful what you wish for... You just might get it.

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    Quote Originally Posted by Jon Gerow View Post
    The goo you see is just "RTV", a type of caulk. You can even buy it from Amazon: https://www.amazon.com/Clear-Electro...dp/B0063U2RT8/

    How does this compare to RTV 162 which you mentioned in a post way back when

    https://www.amazon.com/Momentive-RTV...ct_top?ie=UTF8

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    Quote Originally Posted by ashiekh View Post
    How does this compare to RTV 162 which you mentioned in a post way back when

    https://www.amazon.com/Momentive-RTV...ct_top?ie=UTF8
    You tell me.

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