Keyboard Assembly

A project log for OSI Challenger 4P Reproduction

I am making a full sized Challenger 4P reproduction, a 6502 based personal computer from the late 1970s.

Michael GardiMichael Gardi 11/03/2022 at 09:350 Comments

I've kind of been in a holding pattern waiting for the keyboard "kit" to arrive but no more as it was delivered last week. This is a classic retro-style ASCII keyboard, modeled after the ADM-3A keyboard, which can also be populated to fit perfectly in an Apple II/II+, or an Ohio Scientific Inc. computer. For details check out the Unified Retro Keyboard project.

I was able to purchase the keyboard PCB,  a set of Fubata MD-4PCS keys, a stabilizer panel for the Fubata keys, and a set of reproduction OSI keycaps from Dave at I also ordered an OSI specific encoder which is on backorder.

So I went ahead and assembled the keyboard.  I'm not going to detail the process here since it was mostly identical to the work I did on my Sol-20 Reproduction. For details check out:

After adding the OSI Challenger style keycaps this is what I have. 

Now I just need a case to put it in.