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RE: [TCML] Soldering SISG heat sinks
Thanks guys... Much appreciate the benefit of your experience!
Will epoxy them for mechanical stability and hopefully complete the
conversion over to SISG in time for first light tonight....;- )
Have a great Halloween!
Best Regards,
Bob Johnson
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf Of FIFTYGUY@xxxxxxx
Sent: Thursday, October 30, 2008 9:59 PM
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] Soldering SISG heat sinks
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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