Now this is maybe a book that's worth $153.
Electronic Analog Computers (Second Edition, Hardcover)
Subtitle: D-c Analog Computers
Granino A. Korn, Ph.D. and Theresa M. Korn, M.S.
McGraw-Hill Book Company, 1956 (Original copyright 1952)
The lower-case 'c' is actually how its used in the book and the subtitle.
Here's the first couple paragraphs from the preface of the book:
D-c analog computers are relatively simple electronic devices now
commonly in use to solve a variety of problems in applied mathematics and
engineering design. The application of such computers to the simulation
of modern automatic control systems has been particularly successful; but
some acquaintance with d-c analog techniques can benefit almost any
engineer or research worker, no matter what his special field may be. A
d-c analog representation of a problem does not merely furnish needed
numerical data. It often seves as a working model which helps to close
the gap between physical intuition and exact analysis.
The continuing remarkable progress in the related fields of electronic
computers, instruments, and controls has led naturally to the preparation
of a new, completely revised edition of _Electronic Analog Computers_.
The greater part of the book has been entirely rewritten. We have
attempted to carry out our original purposes, namely
1. To acquaint research and development workers with tried methods for
the application of d-c analog computers as computing aids and
simulators, and with the possibilities and limitations of such
equipment;
2. To present a comprehensive body of up-to-date design information
on computer components and systems.
We believe that such information is of particlar interest to scientists
and engineers engaged in the development of instruments and industrial
control devices.
***
There are also pictures and descriptions in here of computers that I have
never even heard of, such as the Curtiss-Wright analog computer (CURTIAC);
the Berkeley EASE (Electronic Analog and Simulation Equipment) computer
made by the Berkeley Division of Beckman Instruments, Inc.; the Electronic
Associates Precision Analog Computing Equipment (PACE); the Goodyear
Electronic Differential Analyzer (GEDA) made by Goodyear Aircraft
Corporation; and the Reeves Electronic Analog Computer (REAC) made by
Reeves Instrument Corporation, New York City.
Also:
[A picture of a Donner Scientific analog computer]
A complete table-top d-c analog computer priced just below $1,000. The
unit comprises ten operational amplifiers, power supplies, all necessary
controls, and a removable problem board. Multipliers and function
generators are available as accessories (Donner Scientific Co.).
[A picture of a Heath analog computer]
This complete 15-amplifier machine is available as a do-it-yourself kit
for less than $1,000. The amplifier tubes are top-mounted to minimize
heating of components. The 30 coefficient-setting potentiometers are set
by comparison with a built-in precision voltage divider which is also
available for gain measurements (Heath Co.).
Wow.
The book is in excellent shape, save for the damn price written in grease
pencil on the inside cover thanks to the stupid thrift store pricer.
Sam Alternate e-mail: dastar(a)siconic.com
-------------------------------------------------------------------------------
Don't blame me...I voted for Satan.
Coming in September...Vintage Computer Festival 2.0
See http://www.siconic.com/vcf for details!
[Last web page update: 04/13/98]
Can anybody tell me what an IBM Executary is? To describe it briefly (I
didn't have much time to look at it), it is a small box, blue on the bottom
with a dial on the front, a few knobs/switches here and there, and a very
large hole in the side. Connected to it is a pedal of sorts. Push on the
right and it clicks, same with the left. Can anybody tell me what it is? Is
it worth $6?
Thanks,
Tom
< I just got myself a Diamond TrackStar Apple//-in-a-PC board. What lit
<info that I could find says that you can hook an Apple floppy drive to it
<However, in two places, the info says that it takes a standard Apple flop
<and then it says a Unidrive.
<
< Has anyone used this board? Which drive would it use? I know that it
<a 20-pin header on the board for the floppy. Any clues??
I can use any one of them. I don't have the software for mine but the
system I took it out of had it hooked to the 360k and another pigtail
going out of the box and tageed "to unidrive ".
I'd try it if I had software.
Allison
It bangs the disks every 10 minutes or so... What is it doing
that takes a 3 hour runtime?
I can see a sysgen or reload taking that long, but a bootsector write?
-------
In a message dated 98-04-19 15:18:07 EDT, you write:
<<
Has anyone used this board? Which drive would it use? I know that it has
a 20-pin header on the board for the floppy. Any clues??
>>
since it has the 20pin header, it will use the old full height disk ][
drives. adaptors have been made to let the later unidisk drives with the
db15<?> connector work with disk ][ type connectors but i do not have
specifics.
david
(This message is being cross-posted to the Classic Computers and Classic
Macs mailing lists. I apologize in advance to anyone seeing more than
one copy.)
This past weekend I acquired an Aaps MicroTV card, without any software
or manuals.
>
>If we're talking about hundreds or more, you want an automated solution.
>There are several companies which have sold modernish punched card
>readers in the past couple of years with RS-232 interfaces on them;
>the ones I see most often are Mountain Computer units which are about
>the size of a 2-slice toaster and can stack a couple of hundred cards in
>the input hopper. There's both a mark-sense and a punched-card version
>of this unit.
>
>Tim. (shoppa(a)triumf.ca)
So, pray tell... do you know what the difference is between the Mark Sense
and Punch Card versions of the Mountain Computer reader? (and how to tell
which is which?)
I have one of these units in my collection, and even though it happily
accepts the commands which should read punched cards, it always feeds one
card and then returns an error. So, I would start to think that it is the
mark sense version, but have never really found any identifiers on it.
-jim
---
jimw(a)agora.rdrop.com
The Computer Garage - http://www.rdrop.com/~jimw
Computer Garage Fax - (503) 646-0174
>For one thing, why not build a reader? Ought to be a fun weekend
>project ;) The other question is whether the Scantron units use
>optics or electric sensors for checking multiple choice tests.
I'm not sure about this, but electronic makes a LOT more sense. That's why
whenevery ou fill in one of those bubble sheets, they make sure that you use
a "Number 2 pencil." Because it has carbon in it. With an optical solution,
anything from crayon to pen to marker should work, if it were black.
Just my 0.02...
Tim D. Hotze
Moving RSX from that RDwhatever that's making bearing noises to a RL02.
Copied all the data files and such to the RL, but the RL isn't bootable.
When I try booting it types ** THIS IS NOT A HARDWAREBOOTABLE VOLUME **
or something along those lines.
This is RSX11-M v4.1
It's a severely butchered configuration made for a graphics workstation
by Genigraphics, that I hope to try making useful.
If the command required doesn't exist, (Likely!) I cam reload RT-11
and kermit the RL up to a PC, put a bootblock on the front, download
it again, and go. Does that sound do-able?
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