Re: [TCML] Soldering SISG heat sinks

[FIFTYGUY@xxxxxxx]

In a message dated 10/30/08 8:54:22 A.M. Eastern Standard Time,  
bob.johnson@xxxxxxxxxxxxxxxx writes:

>am having an awful time trying to solder the heat  sinks to the board....  
Is there a trick
>to this besides getting  some huge wattage soldering iron? 

    I'm sure you had read the TCML before embarking on  this project, but as 
a reminder here's my post from February::
 
_www.pupman.com/listarchives/2008/Feb/msg00042.html_ 
(http://www.pupman.com/listarchives/2008/Feb/msg00042.html)  
 
 
***************************
 Here's my SISG tips:

1. "Maxclips" for mounting the IGBTs work  fine. I mounted the heatsinks to  
the board, then put compound on the  IGBTs and heatsinks, then dropped the 
IGBTs 
into place on the board, then  screwed on the clip, then went back and 
soldered  the IGBTs in. I  figured this way, everything was in a happy 
clamped 
position  before it  got soldered solid. 

[snip]

4. I put everything  together with a 140W soldering gun. I never understood  
the "use a  low-wattage iron with heat-sensitive components" theory. I have 
more 
luck  blasting it quickly, before the heat has time to spread up the   lead...

***************************
 
-Phil LaBudde

Center for the Advanced Study of Ballistic  Improbabilities
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