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#1
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Museum restoration of 8800
I am starting the restoration of an Altair 8800 for the Goodwill Computer Museum in Austin. It was discovered about half-way through the Goodwill computer recycling process, and despite our best efforts, we were unable to locate some of the pieces.
In particular, it is missing the case and the dress front panel, which I am hoping I can purchase from Grant. I believe we can source the rest of the parts we need (switches, hardware, etc.) from other suppliers. We have a Rev 0 original CPU board, four 4K dynamic memory boards (does anyone have schematics for that board?), and a 3P+S I/O board (I also need the schematic for this one). The chassis is fully loaded with what appear to be factory-built bus cards. Interestingly, in a modification I haven't seen described anywhere, it has had a voltage regulator added to the output of the +8V A supply. |
#2
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Altair Board Schematics
Quote:
http://vt100.net/mirror/harte/Altair/ Tom Lake |
#3
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Schematics and switches
Quote:
On a different topic, I'm having no luck at all locating the double spring-loaded switches used in the bottom row. The ST1-3 switch is still made by APEM (successor to American Switch, who made the originals) but none of their distributors currently has any in stock, and I'm not likely to convince any of them to make a special order for two pieces. If anyone knows of a source for that switch, or an alternate manufacturer's part number for same, please let me know. We have four broken ones on the upper row and two on the lower row. The ST1-1s for data/address entry (upper row) are available from a couple of distributors, but none has the ST1-3. Phil |
#4
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3p+s I/o
Quote:
szpak@eastlink.ca He might have kept some of his old work. Tom Lake |
#5
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Quote:
Geoff. |
#6
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switches
Grant, should be able to get the switches, either now or when He places his next order.. He should be able to add what ever you need on to a later order.
THANKS Marty |
#7
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Today, I stumbled upon this forum and never realized that other "old farts" like me were still around. I was simply trying to show people what my first computer looked like.
I purchased my MITS Altair 8800 in 1975 and still remember a whining college kid that wrote BASIC for it... Ok, this machine is absolutly useless, but how can I get one? When I ordered my first one, MITS allowed me to purchase modules for $200. Since I was in the Army and stationed in Germany at the time, my total income was only $400 per month. However, I was still able to build my first Altair 8800. Today, after all these years, I am still doing the exact same thing. This machine changed my life forever. How do I purchase one of these reproductions? |
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