8 Jul
2014
8 Jul
'14
7:02 a.m.
On Monday (07/07/2014 at 10:46PM -0600), Richard wrote:
Try these:
<http://bitsavers.trailing-edge.com/pdf/ti/terminal/960129-9701_Rev_E_Silent_700_Model_732_733_ASR_KSR_Maintenance_Manual_Nov_1977.pdf>
<http://bitsavers.trailing-edge.com/pdf/ti/terminal/TI-323H-2M_Bulletin_323H_Silent_700_Price_List_Dec_1973.pdf>
IIRC, based on this price list, the difference between the different
models listed there has more to do with the additional options than the
guts of the terminal.
Yes. Thanks Richard but they are sufficiently different actually.
It appears that the 725s that I have were sort of a "first generation".
A lot of the actual printer hardware seems more "crude" in the 725.
For example, there is a real brass bell for ^G rather than a speaker as
in the 732-vintage machines.
The area I am currently interested in, the steppers, timing pulleys
and belt that drive the paper advance are very different. The pulleys
are larger in the 732 and closer together.
The keyboard is very different also-- with the 732 using a keyboard
that looks similar to the smaller 745s, with white keys and a different
layout.
The card cage and electronics look similar so perhaps there is some
commonality there.
For instance the 733 is the same base model terminal
unit with the
dual cassette drives added on top for "automatic send/receive". The
725 is the terminal guts mounted in a suitcase type enclosure with an
acoustic coupler. The 720 is the terminal guts mounted in an
enclosure similar to the 733 but with an RS-232 interface.
Really, I don't think the different "models" are radically different
in terms of the terminal guts, just what extra goodies are arranged
around it and how it is packaged in an enclosure.
I haven't put this idea to the test yet, but you should look at the
733 maintenance manual.
Ya. I think this is mostly true within a particular family-- so
everything based on the 732 platform would follow your theory but 725
is of the previous generation, based on the 720'ish design.
Here's a brochure that discusses this family of units, which are cc. 1972
or so,
https://drive.google.com/file/d/0B6A73VHTVh23OVFBTG9aUHdtX0k/edit?usp=shari…
Chris
--
Chris Elmquist