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'[EE:] SMT soldering with hot-air penns ?'
2004\07\04@084534 by Kyrre Aalerud

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After this SMT oven discussion I came back to my thoughts of using a hot air
pen...
I use a lot of 208 and 150mil devices and usually find them a PITA althought
not impossible to solder by hand.

Would a simple hot-air pen work ?
I mean, if I can get the air-stream to be narrow enough, I could limit pack
heating to a minimum and I could even use it for all my rework on 0603 and
0805 chips.

But how to get one without having to pay your right arm for it ?

Kyrre

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2004\07\04@092815 by Philip Pemberton

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In message <014201c461c5$33647650$fe01010a@cartman>
         Kyrre Aalerud <.....kreatureKILLspamspam@spam@C2I.NET> wrote:

> Would a simple hot-air pen work ?
I can't see why not.

> But how to get one without having to pay your right arm for it ?
There was an article on http://www.usbmicro.com about modifying a RadioShack
desoldering iron for use as a hot air gun. I tried it (after replacing the
120V iron with a 240V 30W cheapie that took the same bits), but couldn't get
it to work. Maybe my soldering iron was a bit weak or the air pressure was
too high or something.

Later.
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2004\07\04@094729 by Michael Olson

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You could try a build your own approach, I havn't tried this as a note.

http://www.usbmicro.com/odn/documents/46.html

I've also heard of a Butane soldering iron with hot blower tip being
used for SMT parts. Havn't tried that either.

-- Michael

Kyrre Aalerud wrote:

<snip>

{Quote hidden}

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2004\07\04@101310 by Kyrre Aalerud

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I have a butane iron with hot-air tip but it becomes so hot that the plastic
around the torch starts to melt.  I don't think that was what the designer
had in mind.  It happens after 4-6 minutes of continous use.  Ther eis
nothing in the manual that forbids continous use so I don't get it.
Maby I should take it back?  (It's been 1 year LOL)

Will oook at making my own.

Thanks
Kyrre



{Original Message removed}

2004\07\04@144117 by David P Harris

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Also: http://palimpsest.stanford.edu/waac/wn/wn20/wn20-1/wn20-105.html

I actually bought the parts, but never tried it.  Note, it was suggested
that you put some brass netting in the tip to increase the heating of
the air as it passes by.

David


Michael Olson wrote:

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2004\07\04@144738 by Kyrre Aalerud

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I was going to use steel-woll in mine.  We'll see how it turns out.

Kyrre

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From: "David P Harris" <KILLspamdpharrisKILLspamspamTELUS.NET>
To: <RemoveMEPICLISTTakeThisOuTspamMITVMA.MIT.EDU>
Sent: Sunday, July 04, 2004 8:39 PM
Subject: Re: [EE:] SMT soldering with hot-air penns ?


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2004\07\04@152707 by Ian Hooper

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I managed to get a just-usable rig made from the RS desoldering iron. I used
an aquarium pump, with a valve to limit the airflow. I also filled the tip
and "barrel" of the iron with copper wool. It works, but is far far away
from the real thing.

ian


----- Original Message -----
From: "Kyrre Aalerud" <kreatureEraseMEspam.....C2I.NET>
To: <EraseMEPICLISTspamMITVMA.MIT.EDU>
Sent: Sunday, July 04, 2004 2:49 PM
Subject: Re: [EE:] SMT soldering with hot-air penns ?


> I was going to use steel-woll in mine.  We'll see how it turns out.
>
> Kyrre
>
.

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2004\07\04@161346 by Spehro Pefhany

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At 08:49 PM 7/4/2004 +0200, you wrote:
>I was going to use steel-woll in mine.  We'll see how it turns out.
>Kyrre

For a flame arrestor, I've successfully used bronze wool. It has a much
higher thermal conductivity than steel wool, so it would be more suitable
for your application.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
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Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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2004\07\04@183202 by Kyrre Aalerud

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Flame arrestor ?

My torch with hot-air muzle has a heat-conductive cheramic flame-arrestor.
I was talking about converting a solder/desoldering iron to hot-air.

Kyrre

{Original Message removed}

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