Re: CBM-II solderless memory expansion

From: Jim Brain <brain_at_jbrain.com>
Date: Fri, 20 Apr 2018 13:14:19 -0500
Message-ID: <04a1b9ea-3b18-6eac-c75a-efdf76177bf1@jbrain.com>
On 4/20/2018 11:26 AM, Mia Magnusson wrote:
> Den Fri, 20 Apr 2018 08:12:14 -0400 skrev David Wood
> <jbevren@gmail.com>:
>
> In my (antiquated) experience, soldering SMD is mostly a question of
> having really good microscope, preferable a stereo microscope. Of
> course you also need some reasonable soldering tools but that is'nt
> that critical.
>
> I used to work at a place that had good streo microscopes. At that
> time, about 20 years ago, those cost about 20000 SEK, about €2000, in
> that times money value. Today I'm sure there are electronic ways to
> make this far cheaper though.
Actually, amscope.com has a nice stereo scope for not much money.  I am 
a satisfied buyer.  Looks like $399 US will get you into one:

http://www.amscope.com/7x-45x-binocular-stereo-boom-microscope-ring-light.html

I picked up a trinocular/144LED light/3MP USB camera for about $150 
more, both those things are not required.


>
> I think that you would want both a small enough soldering iron and also
> some kind of hot air thing. Hot air is good for desoldering and
> soldering small 2/3 pin components and solder most legs of an IC while
> the small soldering iron is good for soldering the first few pins of an
> IC before using hot air to solder the rest.
Hot air is good to have, though cheap hot air stations are ~80.

I agree a nice station is a must.  I swear by my Metcal 500, which I 
picked up used, but my Weller WESD51 was doing fine SMT work up until I 
got the Metcal.  The Weller is ~$100 new.

I would say you can do anything short of BGA with $500 of equipment.

Jim
Received on 2018-04-20 21:00:05

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