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040 socket pin part number? Or, Saving a Sonnet QuadDoubler BST-50FB
Posted by: pl212 on 2025-10-12 11:37:20
I believe this to be a Sonnet BST-50FB (100/50Mhz Quadra/Centris 660AV, 700, 900). The part number on the board (obscured by the cable) is 660-700 REV.1.

I acquired it knowing there would be pin damage...

IMG_1317.jpeg

IMG_1316.jpeg

...and pin damage there is:

IMG_1318.jpeg

I'd like to try de-soldering the individual pin pass-throughs that have broken and replacing them with new ones. (Some of the slightly bent ones I can straighten.)

But I'm afraid I don't know what part numbers to plug into Mouser or Digikey for this project. Is there any terminology or standardized sizing for the pins?

Thanks!
Posted by: herd on 2025-10-12 16:24:48
If you can find the pinout, perhaps there are intact pins in NC positions that you could move to where they are needed?
Posted by: Juror22 on 2025-10-12 18:47:51
If you can find the pinout, perhaps there are intact pins in NC positions that you could move to where they are needed?
That's very clever!
Posted by: Fizzbinn on 2025-10-12 19:42:52
Pinout on page 352:

MC68040UM PDF ยต MOTOROL - NXP Semiconductors
Posted by: Melkhior on 2025-10-13 06:59:37
I'd like to try de-soldering the individual pin pass-throughs that have broken and replacing them with new ones. (Some of the slightly bent ones I can straighten.)
But I'm afraid I don't know what part numbers to plug into Mouser or Digikey for this project. Is there any terminology or standardized sizing for the pins?
Not quite the same use case, but might be helpful anyway:
I never found pins to expand a socket on the usual sites, but I did find some on AliExpress. I was looking to convert a '040 PGA socket (available on Mouser) from regular to V (they have another 3 pins, the socket is unobtainium). A "normal" socket, a bit of dremelling and 3 extra pins did the job.
I got my pins from this link: <https://fr.aliexpress.com/item/1005...t_main.10.54745e5b33w4hw&gatewayAdapt=glo2fra>, I got L7.4/tin plated. They matched my socket very well.
Posted by: robin-fo on 2025-10-13 07:53:32
You could try to solder in some wires of the correct diameter or maybe abuse some pins from preci-dip sockets..
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