DIY CPU Socket For TF520 PGA114 / MC68020
Posted: 25 Feb 2021 12:56
Here is a solution for those hard to find PGA114 sockets for all you 020 aficionados itching to build a TF520.
Same procedure as before, Order 10 PCBs and epoxy 4 together and drill out to make a jig to press the receptacles into the blanks. Recover the pin receptacles from round 2.54mm female pin header strips using side cutters and press fit into the PCBs using a vice or other compression tool.
This version is a two part affair with a 1.6mm base plate and a 1.2mm top plate giving a delightful flush finish to the pins in the socket.
!!!Warning!!! When ordering these PCBs from JLCPCB what you receive might not work due to the allowed tolerances for hole size during manufacture. Undersized is better than oversized but there does seem to be an element of luck involved as to what you receive. I was lucky when ordering this batch that both the top and base plates were spot on. I have received oversized holes in the PCBs even when ordering from the same Gerbers.
The (Rough looking) Jig.
Blanks on jig, pins going in.
The finished article.
Side view, two layer flush finish
Underside
With PGA 020
Same procedure as before, Order 10 PCBs and epoxy 4 together and drill out to make a jig to press the receptacles into the blanks. Recover the pin receptacles from round 2.54mm female pin header strips using side cutters and press fit into the PCBs using a vice or other compression tool.
This version is a two part affair with a 1.6mm base plate and a 1.2mm top plate giving a delightful flush finish to the pins in the socket.
!!!Warning!!! When ordering these PCBs from JLCPCB what you receive might not work due to the allowed tolerances for hole size during manufacture. Undersized is better than oversized but there does seem to be an element of luck involved as to what you receive. I was lucky when ordering this batch that both the top and base plates were spot on. I have received oversized holes in the PCBs even when ordering from the same Gerbers.
The (Rough looking) Jig.
- DSC_0909.resized.JPG (52.88 KiB) Viewed 5959 times
Blanks on jig, pins going in.
- DSC_0900.resized.JPG (62.76 KiB) Viewed 5959 times
The finished article.
- DSC_0910.resized.JPG (56.97 KiB) Viewed 5959 times
Side view, two layer flush finish
- DSC_0915.resized.JPG (41.72 KiB) Viewed 5959 times
Underside
- DSC_0925.resized.JPG (55.85 KiB) Viewed 5959 times
With PGA 020
- DSC_0918.resized.JPG (67.46 KiB) Viewed 5959 times