9 Jul
2005
9 Jul
'05
6:01 p.m.
Hi,
Can anyone give me some more information about a Teleprint 390 ?
I have one now and I think its pretty cool, works just fine but it
would be nice to know some background information.
Anyone by any chance have any docs they would like to part with ?
Thanks!
Stefan.
-------------------------------------------------------
http://www.oldcomputercollection.com
9 Jul
9 Jul
11:13 p.m.
Hi Stefan,
Can anyone give me some more information about a
Teleprint 390 ?
Teleprint 390 is an original Teletype ASR 33 in another cover.
That's
all. There is NO (!!) other difference. The Teleprint cover is made of
metal and has a light. That makes the machine more comfortable and more
quiet.
I have one now and I think its pretty cool, works just
fine but it would
be nice to know some background information.
See above. You don't need any more
info. Or do you need service manuals
for the cover???
Anyone by any chance have any docs they would like to
part with ?
Look out for ASR33 manuals. They're not really rare.
Best regards,
Philipp :-)
10 Jul
10 Jul
3:34 p.m.
Hi Stefan,
Is the 'call control unit' -- the electronics chassis on the right hand
side -- the same? I have a Data Dynamics machine (and I think it's a
model 390) where the mechaical bits are normal Teletype ones, but the
call control unit is very different. It's built on a couple of PCBs (!)
and can handle both RS232 and current loop interfaces.
Can anyone give me some more information about a
Teleprint 390 ?
Teleprint 390 is an original Teletype ASR 33 in another cover.
That's
all. There is NO (!!) other difference. The Teleprint cover is made of metal and has a light. That makes the machine more
comfortable and more
quiet.
Believe it or not, the Teletype manuals for the Model 33 do have cleaning
and lubrication charts for the cover...
-tony
I have one now and I think its pretty cool, works
just fine but it would
be nice to know some background information.
See above. You don't need any
more info. Or do you need service manuals
for the cover???
5:03 p.m.
Hi,
Is the 'call control unit' -- the electronics
chassis on the right hand
side -- the same?
On *my* 390 there is a slightly different "call control
unit". But I
have several 33s and nearly each has a different ccu. Normally you don't
have to worry about that if you have a current loop device in working
condition. There are also a lot of different wiring options for the
machine.....
where the mechaical bits are normal Teletype ones, but
the
call control unit is very different. It's built on a couple of PCBs (!)
and can handle both RS232 and current loop interfaces.
Hey, that's cool. PCBs
are normal in all CCUs.
It will be hard to find schmematics for that.
Believe it or not, the Teletype manuals for the Model
33 do have cleaning
and lubrication charts for the cover...
:-)
... but there's no information about glueing together broken pieces of
grey plastic.... :-)
-- Philipp
6:02 p.m.
There are also a lot of different wiring options for
the machine.....
That's what has always baffled me. There's a magnet driver, for the
printing mechanism. There's an open/close switch, for the keyboard.
There are analogous things for the punch too.
But... there are literally hundreds of contacts spread out between
a dozen or so Molex connectors inside the machine. I realize that
these handle every option under the sun, and probably a couple other
suns that I've never seen too. But turning such a simple electomecahical
machine into such a maze of plugs must've taken a couple of committees.
Tim.
6:35 p.m.
Hi,
There is one Teletype call control unit that was used in the version that
had a built-in 20mA loop interface and no modem. This is the version
that was supposed to be directly connected to the computer's interface,
and it's the version most commonly found.
Is the 'call control unit' -- the
electronics chassis on the right hand
side -- the same?
On *my* 390 there is a slightly different "call control
unit". But I
have several 33s and nearly each has a different ccu. Normally you don't have to worry about that if you have a current loop
device in working
condition. There are also a lot of different wiring options for the
No, but it certainly matters if you have to repair it...
machine.....
The Teletype one I menitoned has one little PCB in the selector magnet
driver (the reader PSU, also on a PCB, is not strictly part of the CCU,
even). There's a lot of hard-wiring too.
The Data Dynamics one, IIRC, has 3 PCBs in it. One carries all the Molex
connectors at the back, which the mechanical parts plug into. The others
contain the reader PSU, singalling PSU, selector magnet driver, etc.
Almost no components no on the PSU.
where the mechaical bits are normal Teletype
ones, but the
call control unit is very different. It's built on a couple of PCBs (!)
and can handle both RS232 and current loop interfaces.
Hey, that's cool. PCBs
are normal in all CCUs. It will be hard to find schmematics for that.
Yes, but probably not too hard to trace out by hand if need be.
Believe it or not, the Teletype manuals for the
Model 33 do have cleaning
and lubrication charts for the cover...
:-)
... but there's no information about glueing together broken pieces of
grey plastic.... :-)
11 Jul
11 Jul
4:47 p.m.
I just hooked up my Teleprint 390 to my laptop and it works like a
charm, almost 100%. I can type on my laptop and the output appears on
both the papertape as typed. And what I type on the Teleprint appears
on my laptop but what it doesn't do is when I feed it a papertape
output it on the laptop (only parts). It does output it correctly on
the Teleprint itself. Any idea's what might be wrong here ?
I am not a real technical person but willing to give anything a try :-)
Stefan.
At 00:35 11-7-2005, you wrote:
The best way to do this IMHO is to put the bits together and run a brush
dipped in dichloromethane along the cracks. This will disolve the plastic
and weld the parts together. Now take some cotton fabric, put it over the
repair on the inside of the case, and brush it over with the
dichloromethane. When the plastic has softened, force the fabric into it.
The result is a fairly strong repair...
-tony
-------------------------------------------------------
http://www.oldcomputercollection.com
Hi,
There is one Teletype call control unit that was used in the version that
had a built-in 20mA loop interface and no modem. This is the version
that was supposed to be directly connected to the computer's interface,
and it's the version most commonly found.
Is the 'call control unit' -- the
electronics chassis on the right hand
side -- the same?
On *my* 390 there is a slightly different "call control
unit". But I
have several 33s and nearly each has a different ccu. Normally you don't have to worry about that if you have a current
loop device in working
condition. There are also a lot of different wiring options for the
No, but it certainly matters if you have to repair it...
machine.....
The Teletype one I menitoned has one little PCB in the selector magnet
driver (the reader PSU, also on a PCB, is not strictly part of the CCU,
even). There's a lot of hard-wiring too.
The Data Dynamics one, IIRC, has 3 PCBs in it. One carries all the Molex
connectors at the back, which the mechanical parts plug into. The others
contain the reader PSU, singalling PSU, selector magnet driver, etc.
Almost no components no on the PSU.
where the mechaical bits are normal Teletype
ones, but the
call control unit is very different. It's built on a couple of PCBs (!)
and can handle both RS232 and current loop interfaces.
Hey, that's cool. PCBs
are normal in all CCUs. It will be hard to find schmematics for that.
Yes, but probably not too hard to trace out by hand if need be.
> Believe it or not, the Teletype manuals for the Model 33 do
have cleaning
and
lubrication charts for the cover...
:-)
... but there's no information about glueing together broken pieces of
grey plastic.... :-) 
12 Jul
12 Jul
8:02 a.m.
From: "Stefan" <birs23 at zeelandnet.nl>
I just hooked up my Teleprint 390 to my laptop and it
works like a
charm, almost 100%. I can type on my laptop and the output appears on
both the papertape as typed. And what I type on the Teleprint appears
on my laptop but what it doesn't do is when I feed it a papertape
output it on the laptop (only parts). It does output it correctly on
the Teleprint itself. Any idea's what might be wrong here ?
I am not a real technical person but willing to give anything a try :-)
I think it is likely that your 390 is generating two stop bits. If your
laptop
isn't expecting that, it would likely construe the second stop bit as a
start
bit and begin looking for the next character. If none is forthcoming (as
when
you are typing, but not too fast), things would be sort of OK. If another
character is sent immediately, it won't be framed correctly (the proper
start
bit would likely be construed as data). The fix for this would require you
to
set your laptop hardware for two stop bits. (I have no idea if that is
possible,
or how to do it.)
If you get the data correctly from the reader in bursts, that is puzzling,
and suggests that something else/additional may be going on.
Vince
6:29 p.m.
From: "Stefan" <birs23 at
zeelandnet.nl>
> I just hooked up my Teleprint 390 to my laptop and it works like a
> charm, almost 100%. I can type on my laptop and the output appears on
> both the papertape as typed. And what I type on the Teleprint appears
> on my laptop but what it doesn't do is when I feed it a papertape
> output it on the laptop (only parts). It does output it correctly on
> the Teleprint itself. Any idea's what might be wrong here ?
> I am not a real technical person but willing to give anything a try :-)
On Tue, 12 Jul 2005, vrs wrote:
I think it is likely that your 390 is generating two
stop bits. If your
laptop
isn't expecting that, it would likely construe the second stop bit as a
start
bit and begin looking for the next character.
Sorry, not correct... a stop bit is simply the line sitting in the
spacing state, eg. it's like a pause between characters, so it
will not trip up comm. systems.
It's always safe to have more than one stop bit, though it lowers
the number of characters/second (at 110, you'll hardly notice :-)
I'm a little unclear on your problem, I'll restate for clarity,
correct me if I'm wrong:
** When you type on the tty keyboard, correct characters appear on
the laptop? Absolutely 100% of the time?
** When you run a punched paper tape through the reader, it prints
correctly on the tty, but what you see on the laptop does not
match the tty?
13 Jul
13 Jul
8:28 p.m.
Hi,
I just hooked up my Teleprint 390 to my laptop and it
works like a
charm, almost 100%.
Good start.
itself. Any idea's what might be wrong here ?
First: I don't know.
One possible but very unlikely case could be that your ASR makes ONE
stop bit and your pc expects TWO. Then you could get in trouble.
Is the erroneous output incomplete or are there wrong characters?
Is your TTY wired for full duplex or half duplex?
10 Jul
10 Jul
3:38 a.m.
If you want to see some pictures of a Teleprint 390 take a look at
http://pdp8.de/frames/set_teletype.html
or
http://pdp8.de/en/frames/set_teletype.html
Gerold
Stefan wrote:
Hi,
Can anyone give me some more information about a Teleprint 390 ?
I have one now and I think its pretty cool, works just fine but it
would be nice to know some background information.
Anyone by any chance have any docs they would like to part with ?
Thanks!
Stefan.
-------------------------------------------------------
http://www.oldcomputercollection.com
8:55 a.m.
Thanks Gerold, know the site.
But than again, I have one myself so ;-) and mine is a real Teleprint 390 hehe
Well that one is too but mine also says Teleprint 390 where the one
on the pictures says Data Plan
But never mind
At 09:38 10-7-2005, you wrote:
If you want to see some pictures of a Teleprint 390
take a look at
http://pdp8.de/frames/set_teletype.html
or
http://pdp8.de/en/frames/set_teletype.html
Gerold
Stefan wrote:
>Hi,
>
>Can anyone give me some more information about a Teleprint 390 ?
>I have one now and I think its pretty cool, works just fine but it
>would be nice to know some background information.
>
>Anyone by any chance have any docs they would like to part with ?
>
>Thanks!
>
>Stefan.
>
>
>-------------------------------------------------------
>http://www.oldcomputercollection.com
>
-------------------------------------------------------
http://www.oldcomputercollection.com
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11 comments
7 participants
participants (7)
-
ard＠p850ug1.demon.co.uk -
birs23＠zeelandnet.nl -
gerold.pauler＠gmx.net -
hachti＠hachti.de -
shoppa_classiccmp＠trailing-edge.com -
tomj＠wps.com -
vrs＠email.msn.com