Well crud, all of the pictures I tool are out of focus. Here is where I currently stand:
All IC sockets and components have been soldered up, I’ve tested the basic power supply section and see the proper output voltages (+5, –5, +12 and –12VDC).
I spent a few minutes with a brush and flux remover to clean off the solder flux, current the board is near the space heater in my shop drying off.
I started out using some 0.1uF ceramic disc caps I bought just for this project, they are about 1 inch across. I was trying to make it look like the caps on Woz’s board in the original post. In the end I really hated how they looked and went with some reclaimed 0.1uF caps from old PCBs from the 1970s and early 80s.
I’ve modified the edge connector I had to look more like the original (removed the ears) and have soldered it up. I was surprised to find several connectors in my stock that I could have used, this one looked unused so I used it. I actually have some prototyping boards that will work with this connector as well, one of them has a 1976 date code, sweet!!!!!!!
The PROMs arrived along with a 6820 from 1976, it’s a purple ceramic unit so it will look great. Having an actual 6820 instead of the later 6821 is another touch that will result in a more period accurate board.
I was digging for transformers for the system and actually found one of the suggested ones on an old power supply from a scrapped bit of gear form several decades ago, again a lucky find.
Many of the parts I collected for the project are show above, not shown is the TTL logic, the PROMs, the 8220, the 0.1uF and the final 22uF caps I used (I didn’t like the look of the orange ones I originally planned to use).
About a third of the of the IC sockets have been soldered in this picture.
