DIY CPU Socket For TF520 PGA114 / MC68020

TF520 - 68020 Board

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go0se
Posts: 289
Joined: Sun Nov 25, 2018 7:55 pm

DIY CPU Socket For TF520 PGA114 / MC68020

Post by go0se » Thu Feb 25, 2021 12:56 pm

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.
DSC_0909.resized.JPG
DSC_0909.resized.JPG (52.88 KiB) Viewed 403 times
Blanks on jig, pins going in.
DSC_0900.resized.JPG
DSC_0900.resized.JPG (62.76 KiB) Viewed 403 times
The finished article.
DSC_0910.resized.JPG
DSC_0910.resized.JPG (56.97 KiB) Viewed 403 times
Side view, two layer flush finish
DSC_0915.resized.JPG
DSC_0915.resized.JPG (41.72 KiB) Viewed 403 times
Underside
DSC_0925.resized.JPG
DSC_0925.resized.JPG (55.85 KiB) Viewed 403 times
With PGA 020
DSC_0918.resized.JPG
DSC_0918.resized.JPG (67.46 KiB) Viewed 403 times
Attachments
020_FACE.zip
(9.13 KiB) Downloaded 20 times
020_BASE.zip
(9.14 KiB) Downloaded 22 times

cmorley
Posts: 193
Joined: Tue May 28, 2019 5:46 pm

Re: DIY CPU Socket For TF520 PGA114 / MC68020

Post by cmorley » Thu Feb 25, 2021 1:25 pm

Ingenious!

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GadgetUK164
Posts: 261
Joined: Fri Jan 04, 2019 2:26 pm

Re: DIY CPU Socket For TF520 PGA114 / MC68020

Post by GadgetUK164 » Thu Feb 25, 2021 2:04 pm

Wonderful!!! You are the master of sockets!!!
My YouTube Channel - www.youtube.com/GadgetUK164

dalek
Posts: 156
Joined: Thu Nov 08, 2018 11:03 am
Location: NSW Australia

Re: DIY CPU Socket For TF520 PGA114 / MC68020

Post by dalek » Thu Feb 25, 2021 10:27 pm

So freakin' cool 8-)

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