13 Dec
1998
13 Dec
'98
3:36 p.m.
At 12:30 PM 12/13/98 -0800, you wrote:
Interesting item on ebay. I hadn't heard of it but
it looks like it is an
interesting part of early computer history! The URL is:
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=47803992
I do remember seeing ads for it (Edmund scientific?), if I can find what it
cost then, I will post it.
I just checked, the bid is now $76, too much for me. I have actually managed
to buy no computer items yet on ebay, did get within 1 minute on one item.
I would be interested in what the minivac did? There are 6 relays, one pole
maybe used as a latch? I forgot what it takes in relays for a 1 bit adder, a
single relay coil can be an exclusive or, foe example.
My point is that I can still find relays for US$1 each, so building
something like this isn't out of the question. The "speculation" value is
less interesting to me... if I had one, under what circumstances would I
sell it? Besides, a homebrew could be modified/improved without the
speculation factor.
-Dave
13 Dec
13 Dec
4:24 p.m.
On Sun, 13 Dec 1998, dave dameron wrote:
I do remember seeing ads for it (Edmund scientific?),
if I can find what it
cost then, I will post it.
It was made by Scientific Development Corp. The ads appeared in Science
Newsletter (which later became Science News). $135. There was also a
Minivac 6010, but I don't have more information about it.
I would be interested in what the minivac did? There
are 6 relays, one pole
maybe used as a latch? I forgot what it takes in relays for a 1 bit adder, a
single relay coil can be an exclusive or, foe example.
Yup, there are six DPDT relays, so you can make a 3-bit adder, logic
gates, etc. There's also a very cool 16-position motorized dial that can
be used for both input (manual control) and output (motor control), as
well as a means to clock sequential logic: a real computer, in short.
My point is that I can still find relays for US$1
each, so building
something like this isn't out of the question. The "speculation" value is
less interesting to me... if I had one, under what circumstances would I
sell it? Besides, a homebrew could be modified/improved without the
speculation factor.
I had planned to build one myself until I recently bought one. Contact me
by private email with suggestions for trades for a copy of the manuals so
you can build your own!
-- Doug
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