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Re: [softrock40] Need to confirm Si570 distroyed

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  • Jasmine Strong
    A much better way of removing these parts is using Chipquik low-melting solder paste. Gob it on liberally around the part, then melt it with the iron; it
    Message 1 of 20 , Jul 29, 2013
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      A much better way of removing these parts is using Chipquik low-melting solder paste.  Gob it on liberally around the part, then melt it with the iron;  it will stay molten long enough that you can remove even large components easily.


      On 29 Jul 2013, at 14:00, Lawrence Galea <galea_lawrence@...> wrote:


      HI rainer, would it then get drunk?

      Da: rainerfeldkamp <rainerfeldkamp@...>
      A: softrock40@yahoogroups.com
      Inviato: Giovedì 25 Luglio 2013 0:44
      Oggetto: [softrock40] Re: Need to confirm Si570 distroyed


      At least in Europe we have a little bit time consuming but less intrusive possibility of removing the Si570 since we have or may may get brass tubes having an OD of 10mm (7/16'' should fit) and an ID of 8mm in hardware shops. Similar tubes should be available in the 'inch' world.

      Further, most soldering irons in the range of 80 to 150W have soldering tips with a shaft diameter of 7 to 8mm. Cut off the flattened end of an old soldering tip up to the circular portion thereof.

      Cut a length of about 25mm (1'') of the brass tube, slit one end thereof over a short length (10 mm), crimp it with pliers onto the remaining shaft portion of the soldering tip so that the tube protrudes about 6 to 10mm beyond and the shaft end (sufficient to take up the height of the Si570 with some clearance not to contact the upper surface of the Si570 with the soldering shaft stub).

      For convenience and for better heat transfer heat this construction in the soldering iron and solder the slotted end to the soldering shaft stub. Let it cool down and deform the free end of the tube with the help of pliers to the rectangular shape of the Si570 so that it snugly fits over it.

      With this 'tool' which is of course reusable many times, heat the soldering iron until you can melt a little bit of solder on the rectangular end and the inner sides thereof and place it quickly over the Si570 and onto the circuit board.

      Softly wiggle the soldering iron until you feel that the Si570 is loose and you will be able to lift it up from the board and shake it out of the tube as quick as possible so that it is not heat damaged.

      A beer mug or similar comes in handy to throw the Si570 into it so that you don't loose it.

      All three Si570 removed so far with this tool have survived.

      73, Rianer DJ6OA

      --- In softrock40@yahoogroups.com, Nick Norman <m6bvj@...> wrote:
      > On 24/07/13 21:53, John Greusel wrote:
      > > Bill,
      > >
      > > The embossing guns are about $15- at hobby/craft stores.
      > > I've put together many softrocks and other things with one.
      > > Useful to have around even if you don't use it for assembly.
      > > Look at Youtube for examples of people using them.
      > >
      > > John
      > > KC9OJV
      > >
      > >
      > The other thing that works is a hot-air paint stripper type gun. But
      > _do_ shield the rest of the board and only use for the minimum time
      > needed, as it is a bit of a hammer to crack a nut solution - but works!
      > HTH
      > Nick
      > M0HGU
      > --
      > "Quick, you must come with me, you're in great
      > danger!" "Why?" "Because I'll kill you if you dont."
      > (Sourcery)
      > 21:55:01 up 3 days, 12:06, 7 users, load average: 1.53, 1.41, 1.28

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