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| Subject: | Re: [Homebrew_PCBs] Good techniques for cleaning up old artwork? |
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| Date: | Fri, 17 Feb 2017 13:27:40 -0700 |
| From: | Harvey Altstadter <harveyalt@...> |
| To: | Homebrew_PCBs@yahoogroups.com |
What you are looking for is machined socket pins. They are a metal cylinder with a solder pin on the bottom, and a recessed contact in the top. They are made by Mill-Max and others. I found these on ebay by searching for machined socket pins: http://www.ebay.com/itm/MACHINE-PIN-SOCKETS-SOLDER-TAIL-100-PCS-/222176780627?hash=item33bac4a153:g:FwUAAOSwOVpXesIn
Another possibility is to get some IC sockets with machined pins, mount and solder the bottom side. Then, with a heat gun, heat the plastic portion of the socket until it softens and you can pull it off. The top pads will then be available for soldering. The advantage of doing it this way, is that the socket pins will all line up. The same search on ebay produces many listings for sockets and headers that use pins with this construction. You might also find them cheaper in listings from some of the surplus outlets.
The is another version of this type of contact, but I couldn't find a listing. These are physically smaller, and come on a strip that is peeled away after soldering. I have used them, but I found that they were such low profile, that I sometimes filled the contact with solder when I was doing the top side.
It used to be possible to get IC sockets that were solderable from both sides. The socket pins came up over the side of the socket, making it (relatively) easy to reach them with a small iron. It's still possible to find sockets that have long enough pins to be solderable from both sides if they're not mounted flush with the board.
Roy