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 Post subject: 1981 IBM Board
PostPosted: Wed Sep 25, 2024 10:55 am 

Joined: Sun Apr 14, 2024 5:06 pm
Posts: 1
Hello all. This is my first time dealing with a computer this old. I am wondering if these gold caps are worth removing. They are marked with what I belive is a Texas instruments logo and a code of 8279251 LE 379274 and then a 80XX HG. I don't want to remove them, as HG is the periodic table symbol for mercury, and save myself the trouble if they are worthless. Thanks!


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 Post subject: Re: 1981 IBM Board
PostPosted: Mon Sep 30, 2024 11:43 am 

Joined: Tue May 14, 2019 11:09 am
Posts: 560
Are you asking about removing the IC from the board or just the cap from the IC? It looks like those ICs are soldered on the board so I would NOT try to remove them. That board would classify as Gold Cap & Gold Edge & CNC at $8.00/lb
https://boardsort.com/images/codes/1016.jpg
https://youtu.be/L2l0WqUzHg0


Last edited by ropeman on Mon Oct 07, 2024 7:56 am, edited 1 time in total.

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 Post subject: Re: 1981 IBM Board
PostPosted: Mon Sep 30, 2024 4:48 pm 
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No Mercury there. It’s just a product code.
You can remove the chips but without gold legs they will fall into one of the middle class ICs (Chris would have to let you know which one).
From there it’s a matter of weighing up the two different aspects and seeing which is more value, chips in or chips out.
Looks like old TI controllers

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 Post subject: Re: 1981 IBM Board
PostPosted: Sun Oct 20, 2024 1:44 am 

Joined: Fri Dec 20, 2019 3:16 am
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Location: Ohio
I believe it would be worth it to remove the gold cap ICs and sell both separately. If I'm not mistaken, they would go for AMD ceramic being only gold cap, no gold pins. I tried searching the forum for this post that has the random CPU classifications but no success.
This is careful work removing those ICs and not taking off any other components or wiping the board.


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 Post subject: Re: 1981 IBM Board
PostPosted: Sun Oct 20, 2024 2:41 am 
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I’ve done many mini/main workstations over the years . Especially DEC and DG.
The rate fluctuates but you’re close. It’s a good point of reference: AMD ceramic, gold cap silver or tin pins.

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