16 Oct
1998
16 Oct
'98
12:07 p.m.
Someone a while back mention that Heath's
manual replacement service no longer carries
manuals for the EC-1 computer. On a lark I
decided to check if they carry manuals for
Heath's original analog computer, the ES-400,
introduced in 1956. They do!
Here's a picture to refresh your memory.
http://www.sou.edu/biology/analog.html#EAC
If you went to VCF 2 and joined the tour of
the Computer History Center's visual storage,
you would have been able to touch one.
I got these model numbers out of the 1959 catalog.
So here are the model numbers and prices of
the manuals that I know that Heathkit has:
$35 ES-400 Cabinet and Front Panel
$25 ES-201 DC Amplifier (the op-amps on top of the cabinet)
$25 ES-100 Initial Condition Power Supply
$25 ES-2 Amplifier Power Supply
$20 ES-50 Reference Power Supply
$20 ES-151 Relay Power Supply
I received the last three, a week ago, and was extremely
surprised to find that they had sent me original manuals and
not copies. They told me that it was not a mistake, they had
extra manuals. These 3 1960 manuals look just like new.
I'm still searching for the Operations Manual for this computer.
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Doug Coward
Press Start Inc.
Sunnyvale,CA
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