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Subject: Re: [Homebrew_PCBs] Good techniques for cleaning up old artwork?

From: Jim Pruitt <jpruitt67@...>
Date: 2017-02-18

I still say the best sockets by far for soldering under are wirewrap sockets.  Yes they have square pins but the leads are about an inch long and so you can raise the socket up as far as you want (if there are no other constraints).  Again you might have trouble finding 18, 20, 22, 24, 28 pin .3" row spacing sockets but I suspect they are available but the 8, 14, 16 pin narrow spacing (.3" row spacing) are available and have been for decades as are the 24, 28, and 40 pin wide row spacing (.6").

Most ic socket pins are inserted into the plastic carriers from the bottom so you can usually place the socket and solder the bottom of the pc board then lift the plastic carrier so you can access the top of the pins.  You have to be careful not to use too much solder on the top of the board or the plastic carrier won't go back over the pins.

With the above paragraph, if you cannot place the plastic carrier back over the pins then you basically have the Molex pins/strips we have been talking about so you can still insert the ic into the pins...assuming you did not use too much solder and did not let it wick up into the part of the socket that the ic pin fits into and clamps against.

Thank you.
Jim Pruitt


On Sat, Feb 18, 2017 at 8:51 AM, 'keith printy' keethpr@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:
 

Heathkit used those in some kits.i used to have reliability issues with them and had to reseat the chips. Better off to use the sockets with the round tooled pins for best reliability

 

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@ yahoogroups.com]
Sent: Friday, February 17, 2017 1:34 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Good techniques for cleaning up old artwork?

 

 

Hello Roland.

Yes, they were/are Molex pins.  I still have 2 strips of 100 but don't really like them without the plastic cover.  I know that Molex later sold the plastic cover strips but I don't  have any

I did not say Molex pins because that is so generic now as Molex makes a lot of different pins and most have nothing to do with IC sockets.

Thank you.

Jim Pruitt

 

On Fri, Feb 17, 2017 at 9:39 AM, Roland Harriston rolohar@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com > wrote:

 

Hello Jim Pruitt:

Could you be referring to "MOLEX PINS"?

Years ago I purchased a bag-full of these items from a now defunct electronics mail order supplier.

I still have a few of them, and use them as required.
You can make any size IC socket you require using these pins.

Regards,

Roland F. Harriston
∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗

On 2/17/2017 10:14 AM, Jim Pruitt jpruitt67@... [Homebrew_PCBs] wrote:

 

 

In the 70's I bought some strips of ic pins.  You broke off the number you needed per row and stuck them in the holes and soldered them (top and bottom if you wanted as there was no plastic carrier for them) and then broke off the metal flange to separate the pins.  I can't remember what they were called but they were used and sold in the Hal ST6 rtty converter kits I built.

 

Jim Pruitt