Les Cargill <(E-Mail Removed)> wrote:
>
>DIP or surface mount? ( as if I had to ask...). Surface mount is an art.
>DIP is heat and torque - an electronics pick/dental tool. Heat,
>and pull.
>
>For SM, you need a heat gun, and frequently, a microscope.
Surface mount is not bad! All you need is Chipquik.... it's some sort
of bismuth alloy that melts below the point where water boils... you
heat up the joint, put chipquik on it, and then it stays soft for a
good twenty or thirty seconds so you can do the others. You have to
remove ALL of it afterward or it will wreck the new joints, but it's
not all that bad.
With a temperature-controlled iron with a fine tip and a $20 Paladin
or Soldapulit solder sucker, you can actually do SMT rework on the kitchen
cable now. It's really a miracle.
Magnification is recommended... the inspection microscope is overkill
but you really want at least 10x head-mounted magnifier and a very bright
bench light. Dental picks are obligatory also.
Yesterday afternoon I used the same iron (though not the same tip) for
working on an SMT disk controller and a modulator deck with octal tubes.
I never would have believed it, but it's true.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
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