12 Jun
2011
12 Jun
'11
3:47 p.m.
Team if anyone on this list has a working ASR/KSR-33 they would like
to donate for an excellent exhibit at the Exploratorium, please
contact Ron below, see note...
Your Name: Ron Hipschman
Your Email address: ronh at exploratorium.edu
Do you guys have a functioning RS-232 teletytpe (ASR-33 or KSR-33)
kicking around that might want to be donated to the Exploratorium for
a possible exhibit?
Ron Hipschman
12 Jun
12 Jun
7:14 p.m.
On 06/12/2011 03:47 PM, Bruce Damer wrote:
Team if anyone on this list has a working ASR/KSR-33
they would like
to donate for an excellent exhibit at the Exploratorium, please
contact Ron below, see note...
Your Name: Ron Hipschman
Your Email address: ronh at exploratorium.edu
Do you guys have a functioning RS-232 teletytpe (ASR-33 or KSR-33)
kicking around that might want to be donated to the Exploratorium for
a possible exhibit?
Ron Hipschman
I've seen a lot of model 33 Teletypes, and I've never yet seen one that
is RS-232. They are almost all current loop. I don't recall seeing any
mention of an RS-232 option in the manuals, although that may have
existed as a third-party modification.
IIRC, the model 40, 42, and 43 machines offered RS-232. The 40 is a CRT
terminal with an optional printer, and the 43 and 43 are 5-level and
ASCII (respectively) versions of a compact dot matrix printing terminal.
10:10 p.m.
Thanks for the announcement. I think I may have a current-loop to RS232 dongle somewhere
around here (or I could make one...)
Ron
--
Ron Hipschman
Exploratorium
3601 Lyon Street
San Francisco, CA 94123
http://www.exploratorium.edu
On Jun 12, 2011, at 7:14 PM, Eric Smith <eric at brouhaha.com> wrote:
On 06/12/2011 03:47 PM, Bruce Damer wrote:
Team if anyone on this list has a working
ASR/KSR-33 they would like to donate for an excellent exhibit at the Exploratorium, please
contact Ron below, see note...
Your Name: Ron Hipschman
Your Email address: ronh at exploratorium.edu
Do you guys have a functioning RS-232 teletytpe (ASR-33 or KSR-33) kicking around that
might want to be donated to the Exploratorium for a possible exhibit?
Ron Hipschman
I've seen a lot of model 33 Teletypes, and I've never yet seen one that
is RS-232. They are almost all current loop. I don't recall seeing any mention of an
RS-232 option in the manuals, although that may have existed as a third-party
modification.
IIRC, the model 40, 42, and 43 machines offered RS-232. The 40 is a CRT terminal with an
optional printer, and the 43 and 43 are 5-level and ASCII (respectively) versions of a
compact dot matrix printing terminal. 
13 Jun
13 Jun
11:28 a.m.
On Sun, 12 Jun 2011, Ron Hipschman wrote:
Thanks for the announcement. I think I may have a
current-loop to RS232
dongle somewhere around here (or I could make one...)
OR,
the 5150/5160 "Asynchronous Communications Card" supported both RS232 AND
Current Loop. Yes, the 8250 won't handle current high speeds, but how
fast are you going to drive an ASR-33?
OR,
find out just what they actually have in mind!
Do they want an ASR-33, because it is "RETRO" looking?
Or are they looking for a printer that can survive the kind of abuse that
kids are capable of? (YES, that is a MAJOR issue for Exploratorium)
Is it expected to be returned intact?
WHY are they looking for an RS-232?
Because it is easier to interface to than current loop?
Or, because they want something that can work at the end of a mile of
wire?
Are they looking for ASCII? or "Baudot" (inaccurate name)?
--
Grumpy Ol' Fred cisin at xenosoft.com
4:56 a.m.
RS-232 on an ASR-33 or KSR-33 was a third party option. Though, if you
have an otherwise normal '33 with pedestal you could cram a current
loop/RS232 converter into the pedestal.
The Model 40 printer is probably almost totally unusable now, as many
of them have had the print band disintegrate over time resulting in
type pellets all over the innards of the printer.
Also, if the teletype machines are to be run for very long stretches
of time over many days and weeks. I would suggest using a 35 machine.
It's an unstoppable force in terms of ASCII machines. (Basically it
was the 28 mechanism adapted for ASCII.)
Also, to what are the Teletype machines being connected? In most cases
of the machine being connected to a classic computer; the computer
itself expects to see the Teletype as a current-loop device. (At least
in terms of machines that were made to talk with teletypes as
terminals.) If the machines are being connected together, I believe
one can get away with hooking them to one another, no need for current
loop conversion.
Cheers to you.
Christian
On 12 June 2011 22:14, Eric Smith <eric at brouhaha.com> wrote:
On 06/12/2011 03:47 PM, Bruce Damer wrote:
Team if anyone on this list has a working ASR/KSR-33 they would like to
donate for an excellent exhibit at the Exploratorium, please contact Ron
below, see note...
Your Name: Ron Hipschman
Your Email address: ronh at exploratorium.edu
Do you guys have a functioning RS-232 teletytpe (ASR-33 or KSR-33) kicking
around that might want to be donated to the Exploratorium for a possible
exhibit?
Ron Hipschman
I've seen a lot of model 33 Teletypes, and I've never yet seen one that
is
RS-232. They are almost all current loop. ?I don't recall seeing any mention
of an RS-232 option in the manuals, although that may have existed as a
third-party modification.
IIRC, the model 40, 42, and 43 machines offered RS-232. ?The 40 is a CRT
terminal with an optional printer, and the 43 and 43 are 5-level and ASCII
(respectively) versions of a compact dot matrix printing terminal.
11:39 a.m.
I've seen a lot of model 33 Teletypes, and
I've never yet seen one that
IIRc, the Data Dynamics 390 was the mechamsim from a Model 33 ASR
(icluding keuyboard and reader, fitted into a new casing, and with new
electroncis. I think some versions of that had RS232 compatibility. But
of course it's not a true Model 33 and doesn't look like one.
One thing, though... There were Model 33s with modems in the stand. What
interface was used to said modem? Rs232 would be 'obvious' (and therefore
likely to be wrong :-))
is RS-232. They are almost all current loop. I
don't recall seeing any
mention of an RS-232 option in the manuals, although that may have
existed as a third-party modification.
As, of coruse did/do currnet loop <-> RS232 interfaces.
-tony
12:22 p.m.
On Monday (06/13/2011 at 07:39PM +0100), Tony Duell wrote:
One thing, though... There were Model 33s with modems in the stand. What
interface was used to said modem? Rs232 would be 'obvious' (and therefore
likely to be wrong :-))
yes... wrong ;-) At least for one datapoint,
I have an Anderson-Jacobson branded ASR-33 which has an AJ 300 baud
acoustic coupler built into the right side of the '33 where the dialer
(for TWX) was usually placed.
This modem plugs into an internal MOLEX connector at the back of the
'33 and talks on the 20mA loop directly. No RS232 involved.
Chris
--
Chris Elmquist
6:31 a.m.
From: bdamer at digitalspace.com
Team if anyone on this list has a working ASR/KSR-33 they would like
to donate for an excellent exhibit at the Exploratorium, please
contact Ron below, see note...
Your Name: Ron Hipschman
Your Email address: ronh at exploratorium.edu
Do you guys have a functioning RS-232 teletytpe (ASR-33 or KSR-33)
kicking around that might want to be donated to the Exploratorium for
a possible exhibit?
Ron Hipschman
Hi
First, I'm sure the Exploratorium has a work shop that can create
RS232 converts without much problem.
I wonder what they want with them. While these machine are
relatively rugged, they won't hold up to the typical use of those
that got to the exploritorium.
Erik klein had his setup with an Altar to punch out peoples names
on paper tape ( banner style not ASCII ) at the Make Faire. The punch would
periodically jam, requiring someone to clear it.
I can imaging the pounding some would give it if it locked up
without someone there to watch it all the time.
Dwight
4941
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participants (8)
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ard＠p850ug1.demon.co.uk -
bdamer＠digitalspace.com -
captainkirk359＠gmail.com -
chrise＠pobox.com -
cisin＠xenosoft.com -
dkelvey＠hotmail.com -
eric＠brouhaha.com -
ronh＠exo.net