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Article #16539

Re: Heat gun pcb cannabalization

#16539
From: Rusty Carruth
Date: Mon, 25 Jan 1993 21:18
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In article <74011@cup.portal.com> Ted_Eugene_Viens@cup.portal.com writes:
>>
>A local surplus parts house desolders complete boards by heating them is a
>skillet with a shallow layer of oil until the solder melts, taking the board
>out and slamming it down upside down to knock out the components en masse.
>If I was going to do this, I would by a table-top electric thermostatically
>controlled skillet and use some synthetic motor oil.  Put enough oil in the
>skillet to reach the bottom of the board, set it to 450 degrees and desolder
>your buns off...

(Well, I *personally* don't want my buns soldered off, thank you very much! ;-)

Hmm.  Synthetic motor oil, eh?  That might have been better than what
we did - we used cooking oil because of not wanting the (assumed) noxious 
fumes we expected from motor oil.  The main problem with cooking oil was
that it has a very short "hot enough but not so hot to burn" range - you
have to keep it almost smoking but not quite....

I would also think, now that I pause to think about what we were doing
(yeah, pausing to think about 10 years after the deed is done!), is
that the solder pot would have been a MUCH safer way to go about it -
you could clamp the solder pot down, you don't have to diddle with
the stupid pan edges (I remember wearing my leather motorcycle gloves
in order to be able to handle the boards - don't try this at home,
kids!), stuff like that.  I don't remember if we tried to heat only
the board or if we stuck the entire assembly under the oil - I think
the former, and I vaguely recall it was NOT a simple matter to get
enough oil in the pan (NOT exactly the flattest surface around)
to cover the pins in the middle AND the edges...

>I would like to here back from anyone who tries this...
>Bye...  Ted..

Rusty@anasazi.com
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References: <1jgs7pINNegs@clover.csv.warwick.ac.uk> <1993Jan19.135004.1226@cmkrnl.com> <74011@cup.portal.com>

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Newsgroups: sci.electronics
Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!asuvax!ennews!anasaz!rusty
From: rusty@anasazi.com (Rusty Carruth)
Subject: Re: Heat gun pcb cannabalization
Organization: Anasazi, Inc.  Phoenix, Arizona USA
Date: Mon, 25 Jan 1993 21:18:10 GMT
Message-ID: <1993Jan25.211810.4399@anasazi.com>
References: <1jgs7pINNegs@clover.csv.warwick.ac.uk> <1993Jan19.135004.1226@cmkrnl.com> <74011@cup.portal.com>
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