chips vs chad

Rod Smallwood rodsmallwood at btconnect.com
Fri Apr 9 00:17:53 CDT 2010


Re Desoldering ic's

We used a special Weller tip. It consisted of metal block (about the same
size and shape as an IC base with holes where the pins would be) attached to
a Weller tip sleeve (ie the part that held the tip to the heating barrel)
On the component side you had a spring loaded clip that exerted even
pressure on the chip away from the board. Apply said tip to the copper side
of the board and the chip came out complete. Then the solder sucker was used
to clear out the holes. 

Regards 
 
Rod Smallwood
 

-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
On Behalf Of Fred Cisin
Sent: 09 April 2010 00:35
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: chips vs chad

> >> There is an active thread on the list about how to desolder chips. How
> >> do you keep them from burning?
> > That doesn't bother me as 63/37 solder melts somewhat below the
> > temperature at which paper catches fire.  It's *tinning* the darned
> > stuff that's the problem.

On Fri, 9 Apr 2010, Pete Turnbull wrote:
> Easy -- coat them with aquadag and then copper-plate them before tinning.

. . . or fire up the punch, and make a batch of chips out of "tin foil"




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