SOJ20 adapters for Blizzard Turbo Memory A500 or 2MB chip ram

mt777

Member
Joined
Jul 22, 2018
Posts
496
Country
Poland
Region
Poznań
Recently I bought turbo card for A500 without memory. 44C256 are easily (cheaply) to find but problem is fullfilling this card with 16x 1MBx4 rams.
Sockets are located very tightly - without space between them so I decided to design small SOJ20-DIP20 adapter (without holes for legs). 51440 in SOJ package are much easier to find (SIMMs or another memory board - I have one server memory module with 80pcs of HYB51440).

The main problem is soldering legs. Precision socket is very stable for that but it was not easy to solder it to the adapter. I considered also using female-male pin header but it is a bit complicated for positioning. Maybe male-male socket will be better but I don't have them in my stock.

Finally it does work :)

If anyone know more smart solution for making legs - please comment.

adapters_resized.jpgblizzard3_resized.jpgmemtest_resized.jpg

If will you need that adapters (rather without soldering service) then I can sell them next time but currently I printed only 10pcs for testing. They are also good for 2MB chip ram upgrading for A500+ motherboards.
 
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