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heat sink compound

Discussion in 'Troubleshooting and Repair' started by HLOW, Apr 10, 2013.

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  1. HLOW

    HLOW

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    Jan 24, 2013
    Does anyone know of a good substitute for heat sink compound? And is it really necessary?
    Thanks!
     
  2. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,267
    Nov 28, 2011
    I think Steve recommends chocolate... :p
     
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,299
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    Jan 21, 2010
    I can tell you that chocolate is NOT a good substitute.

    See here.
     
  4. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    Necessary, no but it helps the efficiency of heat transfer and if you are borderline it could make or break your project...

    As for wanting a substitute, why? You can get it easy enough that it's hardly worth the effort or time to find a substitute... And before you say you can't get it, have you actually tried at say a computer store or shop? It's standard build procedure now to use it on CPUs and even some other chips inside a computer like memory, so any shop that sells computer parts should sell little tubes of it... If not it's all over Ebay for cheap...
     
  5. MikeL

    MikeL

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    0
    Apr 9, 2013
    Silicon heats compound substitute

    I think some kind of compound is neccesary, but there are 2 substitutes for silicon heat sink compound.
    There is a non silicon compound available from mg chemicals and others. Advantages are no migration or component contamination.

    There is also a silicon rubber I have seen. It is a thin rubber grey sheet used in place of mica with silicon. Electrical insulator but high heat transfer. I have not been able to buy them but have seen them used a lot

    That said I prefer silicon because it is lower cost and I believe works better, as well as silicon is easy to see where it is, and also to see if it has dried out
     
  6. quantumtangles

    quantumtangles

    152
    3
    Dec 19, 2012
    I tried chocolate as a heatsink compound (for an L7805 voltage regulator connected to a 12v supply). The voltage regulator stopped working but I made some nice toffee.

    If you check out the following video on youtube 'Rubidium Frequency Standard Teardown' you will see at 3:21 of the video that the (Stanford?) engineers used chocolate solder when making their frequency generator calibrator.



    @ 3:21 minutes
     
    Last edited: Apr 22, 2013
  7. john dougherty

    john dougherty

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    Feb 11, 2013
    servisol 25 gram tubes can be bought from manzan electronics and will give you a quote . The compound is necessary as it dissipates the heat from out put transistors and IC s .By doing this it helps to keep the circuit COOL and prevents thermal runaway . Such cases would be power audio amplifier s like Marshall and fender .Also dj work . As for a substitute I do not know of any . If you would like to know a SPEC Manzan electronics will help
     
    Last edited: Jul 14, 2013
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