Re: [Xylo-SDR] Xylo-SDR Digest, Vol 2, Issue 33

Subject: Re: [Xylo-SDR] Xylo-SDR Digest, Vol 2, Issue 33

From: FRANCIS CARCIA <carcia@sbcglobal.net>

Date: Thu, 12 Jan 2006 16:15:24 -0800 (PST)

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Reply-to: Xylo-SDR Discussion <xylo-sdr@lists.ae5k.us>

An assembly girl taught me a cool way of soldering surface mount parts when you don't have 3 arms. Set the part in place. Cut a small hunk of solder and place it near the first joint. Hold the part in place with one hand and solder it with the other. Third hand not required to hold the solder. Once the first joint is made the rest is easy.

The thought of working with BGAs make me want to go back to octal tubes.

You really need xray equipment to be really sure.

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Today's Topics:

1. Re: Toaster oven (Philip Covington)
2. Re: Toaster oven (Philip Covington)
3. Re: Toaster oven (pvharman@arach.net.au)

----------------------------------------------------------------------

Message: 1
Date: Wed, 11 Jan 2006 21:58:49 -0500
From: Philip Covington
Subject: Re: [Xylo-SDR] Toaster oven
To: Xylo-SDR Discussion
Message-ID:
<32aa05ee0601111858t6aeff220pd571198ad8f18ea2@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Before I'd waste the time and money on modifying a toaster oven and
buying the solder paste (which is quite expensive) I would invest in a
stereo boom arm microscope with about 10x magnification. That,
combined with a nice small soldering iron tip, will allow you to
easily solder the 0.5 mm pitch parts. You can get a brand new boom
arm microscope with light and 8" working distance for about $250.

See my blog for more info: http://pcovington.blogspot.com/

You still need to be able to inspect your solder joints if you use the
toaster method anyhow... the microscope does double duty as an
inspection scope here...

Now, for BGA's, the microscope won't help you. Take a look at
SparkFun.com for info on his shop... He uses a hot plate and it is
superior to the toaster oven method in many ways. He explains why...
Good reading...

73 de Phil

On 1/11/06, Ahti Aintila wrote:
> This link might be useful for home brewers:
> http://www.seattlerobotics.org/encoder/200006/oven_art.htm
>
> 73, Ahti OH2RZ
>
> ----- Original Message -----
> From: "Leon Heller"
> To: "Xylo-SDR Discussion"
> Sent: Monday, January 09, 2006 2:30 PM
> Subject: [Xylo-SDR] LTC2208
>
>
> > I've just ordered a couple of samples of the LTC2208. As has been
> > said, it
> > does look like a better chip than the ADI one, if a bit more
> > expensive. The
> > QFN package is harder to work with, but a company I know will assemble
> > them
> > for me quite cheaply. They actually mounted some smaller QFN
> > accelerometer
> > chips for me for nothing, just before Xmas, as I'd driven a long way
> > to
> > them, and they only took them 30 minutes. I've actually bought a very
> > cheap
> > toaster oven for this sort of assembly, but I need to build a
> > controller for
> > it to get the right temperature profile.
> >
> > Don't bother to tell me I've got some pins wrong on the FX2LP chip on
> > my
> > schematic, I'm correcting them.
> >
> > 73, Leon
> > --
>
> _______________________________________________
> Xylo-SDR mailing list
> To post msg: Xylo-SDR@ae5k.us
> Subscription help: http://lists.ae5k.us/listinfo.cgi/xylo-sdr-ae5k.us
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> Forum pages: http://www.hamsdr.com/hamsdrforum/
>

------------------------------

Message: 2
Date: Wed, 11 Jan 2006 22:02:55 -0500
From: Philip Covington
Subject: Re: [Xylo-SDR] Toaster oven
To: Xylo-SDR Discussion
Message-ID:
<32aa05ee0601111902l76da394ke5e9f810b1d160d9@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

In case you can't find it:

http://www.sparkfun.com/tutorial/ReflowToaster/reflow-hotplate.htm

de Phil N8VB

On 1/11/06, Philip Covington wrote:
> Before I'd waste the time and money on modifying a toaster oven and
> buying the solder paste (which is quite expensive) I would invest in a
> stereo boom arm microscope with about 10x magnification. That,
> combined with a nice small soldering iron tip, will allow you to
> easily solder the 0.5 mm pitch parts. You can get a brand new boom
> arm microscope with light and 8" working distance for about $250.
>
> See my blog for more info: http://pcovington.blogspot.com/
>
> You still need to be able to inspect your solder joints if you use the
> toaster method anyhow... the microscope does double duty as an
> inspection scope here...
>
> Now, for BGA's, the microscope won't help you. Take a look at
> SparkFun.com for info on his shop... He uses a hot plate and it is
> superior to the toaster oven method in many ways. He explains why...
> Good reading...
>
> 73 de Phil
>
> On 1/11/06, Ahti Aintila wrote:
> > This link might be useful for home brewers:
> > http://www.seattlerobotics.org/encoder/200006/oven_art.htm
> >
> > 73, Ahti OH2RZ
> >
> > ----- Original Message -----
> > From: "Leon Heller"
> > To: "Xylo-SDR Discussion"
> > Sent: Monday, January 09, 2006 2:30 PM
> > Subject: [Xylo-SDR] LTC2208
> >
> >
> > > I've just ordered a couple of samples of the LTC2208. As has been
> > > said, it
> > > does look like a better chip than the ADI one, if a bit more
> > > expensive. The
> > > QFN package is harder to work with, but a company I know will assemble
> > > them
> > > for me quite cheaply. They actually mounted some smaller QFN
> > > accelerometer
> > > chips for me for nothing, just before Xmas, as I'd driven a long way
> > > to
> > > them, and they only took them 30 minutes. I've actually bought a very
> > > cheap
> > > toaster oven for this sort of assembly, but I need to build a
> > > controller for
> > > it to get the right temperature profile.
> > >
> > > Don't bother to tell me I've got some pins wrong on the FX2LP chip on
> > > my
> > > schematic, I'm correcting them.
> > >
> > > 73, Leon
> > > --
> >
> > _______________________________________________
> > Xylo-SDR mailing list
> > To post msg: Xylo-SDR@ae5k.us
> > Subscription help: http://lists.ae5k.us/listinfo.cgi/xylo-sdr-ae5k.us
> > Xylo-SDR web page: http://xylo-sdr.ae5k.us
> > Forum pages: http://www.hamsdr.com/hamsdrforum/
> >
>

------------------------------

Message: 3
Date: Thu, 12 Jan 2006 12:25:33 +0800
From: pvharman@arach.net.au
Subject: Re: [Xylo-SDR] Toaster oven
To: Xylo-SDR Discussion
Message-ID: <1137039933.43c5da3dda749@mailmanager.arach.net.au>
Content-Type: text/plain; charset=ISO-8859-1

Phil,

Could you please let me have the details of the microscope that you use - I
would like to purchase one.

73's Phil....

Quoting Philip Covington :

> In case you can't find it:
>
> http://www.sparkfun.com/tutorial/ReflowToaster/reflow-hotplate.htm
>
> de Phil N8VB
>
> On 1/11/06, Philip Covington wrote:
> > Before I'd waste the time and money on modifying a toaster oven and
> > buying the solder paste (which is quite expensive) I would invest in a
> > stereo boom arm microscope with about 10x magnification. That,
> > combined with a nice small soldering iron tip, will allow you to
> > easily solder the 0.5 mm pitch parts. You can get a brand new boom
> > arm microscope with light and 8" working distance for about $250.
> >
> > See my blog for more info: http://pcovington.blogspot.com/
> >
> > You still need to be able to inspect your solder joints if you use the
> > toaster method anyhow... the microscope does double duty as an
> > inspection scope here...
> >
> > Now, for BGA's, the microscope won't help you. Take a look at
> > SparkFun.com for info on his shop... He uses a hot plate and it is
> > superior to the toaster oven method in many ways. He explains why...
> > Good reading...
> >
> > 73 de Phil
> >
> > On 1/11/06, Ahti Aintila wrote:
> > > This link might be useful for home brewers:
> > > http://www.seattlerobotics.org/encoder/200006/oven_art.htm
> > >
> > > 73, Ahti OH2RZ
> > >
> > > ----- Original Message -----
> > > From: "Leon Heller"
> > > To: "Xylo-SDR Discussion"
> > > Sent: Monday, January 09, 2006 2:30 PM
> > > Subject: [Xylo-SDR] LTC2208
> > >
> > >
> > > > I've just ordered a couple of samples of the LTC2208. As has been
> > > > said, it
> > > > does look like a better chip than the ADI one, if a bit more
> > > > expensive. The
> > > > QFN package is harder to work with, but a company I know will assemble
> > > > them
> > > > for me quite cheaply. They actually mounted some smaller QFN
> > > > accelerometer
> > > > chips for me for nothing, just before Xmas, as I'd driven a long way
> > > > to
> > > > them, and they only took them 30 minutes. I've actually bought a very
> > > > cheap
> > > > toaster oven for this sort of assembly, but I need to build a
> > > > controller for
> > > > it to get the right temperature profile.
> > > >
> > > > Don't bother to tell me I've got some pins wrong on the FX2LP chip on
> > > > my
> > > > schematic, I'm correcting them.
> > > >
> > > > 73, Leon
> > > > --
> > >
> > > _______________________________________________
> > > Xylo-SDR mailing list
> > > To post msg: Xylo-SDR@ae5k.us
> > > Subscription help: http://lists.ae5k.us/listinfo.cgi/xylo-sdr-ae5k.us
> > > Xylo-SDR web page: http://xylo-sdr.ae5k.us
> > > Forum pages: http://www.hamsdr.com/hamsdrforum/
> > >
> >
> _______________________________________________
> Xylo-SDR mailing list
> To post msg: Xylo-SDR@ae5k.us
> Subscription help: http://lists.ae5k.us/listinfo.cgi/xylo-sdr-ae5k.us
> Xylo-SDR web page: http://xylo-sdr.ae5k.us
> Forum pages: http://www.hamsdr.com/hamsdrforum/
>

------------------------------

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End of Xylo-SDR Digest, Vol 2, Issue 33
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