[sdiy] water clean solder

[Magnus Danielson]

From: harry <harrybissell at prodigy.net>
Subject: Re: [sdiy] water clean solder
Date: Sat, 29 Dec 2001 20:39:12 -0500

> Hi Andre (and all)

Hi folks,

Where onto the sockets again, aren't we?
Couln't stay away from them, eh?

> Don't get me wrong... I mentioned the AMP Diplomate Dual Leaf sockets.
> 
> NOT all the other cheap leaf sockets... which I would NEVER use.
> 
> The AMP grasp the leads on the wide, flat side of the pin... from both
> inside and outside.  The spring acts in compression  (I'll say cantelever...
> and if
> I'm wrong everyone can enjoy flaming me...)
> 
> The CHEAP ones grasp the IC pins from the edges... and use the spring contacts
> in
> tension. They suck... IMHO
> 
> Beware... AMP makes (or made) an even cheaper version, with the spring only on
> the outside. I don't like these either.

I think I can envision all the above without knowing the exact trade
names of each type, but it agrees well with my experience.

> I also see a lot of "tulip" sockets where the assembly people don't get the
> pins in right.  OTOH... this is possible with the AMP also... but you will
> probably get the
> outside spring connected anyway. This was the case in my ProOne... where the
> D/A
> converter had the two LSB pins bent under, and making contact only on the edge.
> 
> I got it for $60 taking the chance that parts were broken that were not
> replaceable.
> 
> Imagine my joy when I opened it up and found that !!!

Indeed. This reminds me of my youth sins as working in a computer shop
back in the end of the 80thies. That where the time when you stuffed
72 41256 100 ns DRAMs onto the board by hand. It took some learning to
figure out how to see if one bent the leads or not. It was a living
hell to fiddle with those chips all the time. I still have a tube of
possibly broken chips lying around somewhere. Let's just say that you
picked up experience pretty quick. You basically have to look in from
the side and have a flashligth at some other angle into the side...

These where the days when we sold 20 MHz 386 machines on full-sized
motherboards and usually stuffed the machines with 2 MB DRAM, 60 MB
HDD (Seagate ST-277R, an RLL disc), 5.25" and 3.5" floppies and a CGA
board. EGA or VGA was optional ;O)
Those where the days....

Cheers,
Magnus - left the PC buissness over 12 years ago