[Coco] Desoldering tools

[Grumpyx]

I use an older Hakko de-soldering gun looks like the generic version I've
linked below. It appears Hakko has a newer version now. Be sure to order
extra filters as they are key to them continuing to work well. I also like
that's it portable.

https://www.ebay.com/itm/S-993A-110V-90W-Electric-Vacuum-
Desoldering-Pump-Solder-Sucker-Gun-In-US-/251876278039?epid=504338133&
hash=item3aa4feff17:g:i9MAAOSwdGFY2fNZ

I have seen mentioned before with older solder joints sometimes it's better
if you re-solder them with fresh solder before using the de-solder pump. I
have used this tip many times and it has helped save parts and pads.

Malcom





On Thu, Oct 19, 2017 at 2:20 PM, Salvador Garcia via Coco <
coco at maltedmedia.com> wrote:

> Since desoldering was mentioned in the thread titled "I've killed my
> CoCo", I thought I'd ask about what tools are used to desolder chips.
>
> Ed mentioned that different techniques work for different people, so I am
> interested in hearing what others have to say.
>
> Lately, I had to desolder a bunch of electrolytic caps (not CoCo related)
> and I found that it took a while for the solder to melt and release the
> cap's lead.
>
> In the past, I've used a desoldering pump like this one:
>
> https://www.digikey.com/product-detail/en/17537/243-1184-ND/1992578
>
> While effective, I found that I needed to press it against the PCB because
> if I didn't, the "kickback" from the pump action would move the pump away
> from the PCB, not effectively sucking the solder. Also, I found that for
> me, this device worked best when I applied the heat on one side of the PCB
> while pressing the pump's tip to the other side and releasing it when the
> solder melted. However, this was not always possible and sometimes I found
> myself having to melt the solder (on the PCB''s solder side) then quickly
> pressing the pump's tip against the PCB and releasing it. This worked, but
> rather clumsily. Currently, the pump has seen better days because it no
> longer locks in position reliably.
>
> When I had to remove the 6809 from my non-functional CoCo 3 I used solder
> wick. This worked, as evidenced by the silvery finish on the wick, but I
> have taken too long to remove all the solder and I still have not been able
> to free all the pins.
>
> I saw a desoldering gun in action at a recent Maker event and was
> impressed.
>
> I don't desolder often, but when I do, I really need an effective way of
> doing this. I was looking into buying a desoldering gun, but the prices
> hover around $150 USD and this is too expensive for me for just occasional
> use.
>
> I hope other share their experiences and the tools that they use, perhaps
> recommending specific products.I certainly am interested in learning from
> others' expriences :-).
>
> Thanks, best wishes, Salvador
>
>
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