Piggybacking 74LS logic chips to confirm a suspected fault

Jonas Otter jonas at otter.se
Sat Dec 26 12:40:47 CST 2015

On 2015-12-25 22:29, Chuck Guzis wrote:
> On 12/25/2015 01:10 PM, William Donzelli wrote:
>> OK, I misunderstood you. No, I have never seen one of those that was
>> not a turned pin type.
> TI also sold some wire-wrap sockets (gold-plated to their credit) with 
> "forked" type contacts which were welded(?) to the wrap posts.  They 
> had the annoying habit of separating the post from the contact fork if 
> stressed too much.  Made for some frustrating debugging.
> I learned my lesson early on--use Augat sockets.  Your time is worth 
> more than the expense.
> --Chuck
I also used a number of those in the beginning of my career, before I 
knew better. They were truly awful. IIRC they would also lose spring 
tension, causing disconnections. The gold plating was a complete waste 
of money. I got some with some wirewrap equipment I bought from an 
online auction a while ago. I am debating whether to throw them away or 
to keep them as exhibits of remarkable crappiness.


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