28 Jun
2012
28 Jun
'12
6:22 a.m.
Hi all,
Do you guys know of a failsafe way to check if a Teletype is for 110
or 220V? I've bought one which has a power connector which seems like
US mains. The motor is 50Hz, but I guess that won't make a difference.
Any quick way to check without completely dismantling the machine?
re,
Sander
--
~ UNIX is basically a simple operating system,
? ? ? ? ? ?but you have to be a genius to understand its simplicity. ~ dmr
28 Jun
28 Jun
10:02 a.m.
On 28 Jun 2012 at 15:22, Sander Reiche wrote:
Do you guys know of a failsafe way to check if a
Teletype is for 110
or 220V? I've bought one which has a power connector which seems like
US mains. The motor is 50Hz, but I guess that won't make a difference.
Any quick way to check without completely dismantling the machine?
If the motor is verifiably 50Hz, the probability is overwhelming that
it's 220V. However, you might post a photo of the power connector
somewhere--there are countries (e.g. Australia) with 220V 50Hz power
where the mains connector looks a lot like a North American 2-blade
connector.
--Chuck
11:11 a.m.
On Thu, Jun 28, 2012 at 7:02 PM, Chuck Guzis <cclist at sydex.com> wrote:
If the motor is verifiably 50Hz, the probability is overwhelming that
it's 220V. However, you might post a photo of the power connector
somewhere--there are countries (e.g. Australia) with 220V 50Hz power
where the mains connector looks a lot like a North American 2-blade
connector.
Sorry for the atrocious quality, but it's getting dusky here ;)
http://ls-al.eu/~reiche/220v1.jpg
http://ls-al.eu/~reiche/220v2.jpg
http://ls-al.eu/~reiche/220v3.jpg
re,
Sander
--
~ UNIX is basically a simple operating system,
? ? ? ? ? ?but you have to be a genius to understand its simplicity. ~ dmr
12:46 p.m.
On 28 Jun 2012 at 20:11, Sander Reiche wrote:
On Thu, Jun 28, 2012 at 7:02 PM, Chuck Guzis
<cclist at sydex.com> wrote:
That's definitely a 120V North American NEMA-5-15 plug.
So this clouds matters considerably. Are you *certain* that the
motor is 50Hz? 50Hz induction motors will spin just fine on 60Hz and
pretty much vice-versa, but the speed won't be the same.
--Chuck
> If the motor is verifiably 50Hz, the
probability is overwhelming
that > it's 220V. However, you might post a
photo of the power
connector > somewhere--there are countries (e.g. Australia) with 220V
50Hz power > where the mains connector looks a lot like a North
American 2-blade > connector.
Sorry for the atrocious quality, but it's getting dusky here ;)
http://ls-al.eu/~reiche/220v1.jpg
http://ls-al.eu/~reiche/220v2.jpg
http://ls-al.eu/~reiche/220v3.jpg
1:46 p.m.
On Thu, Jun 28, 2012 at 9:46 PM, Chuck Guzis <cclist at sydex.com> wrote:
That's definitely a 120V North American NEMA-5-15
plug.
So this clouds matters considerably. ?Are you *certain* ?that the
motor is 50Hz? ?50Hz induction motors will spin just fine on 60Hz and
pretty much vice-versa, but the speed won't be the same.
Yup, large metal
emblem on the thing stating it's 50Hz. I'll take a
picture tomorrow. But I can't imagine it being the definitive answer
to my question...
re,
Sander
--
~ UNIX is basically a simple operating system,
? ? ? ? ? ?but you have to be a genius to understand its simplicity. ~ dmr
1:53 p.m.
So this clouds matters considerably. Are you
*certain* that the
motor is 50Hz? 50Hz induction motors will spin just fine on 60Hz and
pretty much vice-versa, but the speed won't be the same.
Very liekly to be. As you know, it's easy to change voltage (an
(auto)transformer), it's a lot harder to change frequency. So the
European Model 33s (and I asusme other Teletypes iwth induction motors)
had 110V motors that would run on 50Hz and were geared appropraitely.
I seem to rememmbere the official set-up had a normal 3 pin 110V US mains
plug and in-line socket between the autotransformer and the machine. It
was notmally all hidden in the floor stand.
-tony
5:08 p.m.
On 28/06/2012 18:02, Chuck Guzis wrote:
On 28 Jun 2012 at 15:22, Sander Reiche wrote:
Probably not, actually. My supplied-in-the-UK ASR33 is 50Hz and has a
110V motor, and has a big transformer in the base to allow it to be used
on 240V AC mains. So have other UK models I've looked at.
--
Pete Peter Turnbull
Network Manager
University of York
Do you guys know of a failsafe way to check if a
Teletype is for 110
or 220V? I've bought one which has a power connector which seems like
US mains. The motor is 50Hz, but I guess that won't make a difference.
Any quick way to check without completely dismantling the machine?
If the motor is verifiably 50Hz, the probability is overwhelming that
it's 220V.
5:45 p.m.
On 29 Jun 2012 at 1:08, Pete Turnbull wrote:
Probably not, actually. My supplied-in-the-UK ASR33
is 50Hz and has a
110V motor, and has a big transformer in the base to allow it to be
used on 240V AC mains. So have other UK models I've looked at.
Yup, Tony's made it clear that you folks in fifty-hurts land have a
transformer in the base. Strange, but true.
So, if the OP doesn't have one, he needs to find one.
--Chuck
8:59 p.m.
From: cclist at sydex.com
On 29 Jun 2012 at 1:08, Pete Turnbull wrote:
Hi
I don't have my manuals at hand but it seems that I recall there
being a small transformer that provided the current for the local
mode operation.
I just don't recall the output voltage. If one knew what the voltage
was suppose to be, one could simply disconnect the motor and
then plug it into 110V. Measure the output of that transformer.
If half the specified voltage, it would be intended to be connected
to 220V.
It is most likely a 110V, as several had said. If so, look around
for some old electronic gear or powersupplies. Most often they
have a split input that can be used as an auto-transformer.
That will get you the 110v from the 220v. The auto-transfomer
has the advantage that it only needs to carry 1/2 the power,
unlike a full isolation transformer that has to carry the full power.
Dwight
Probably not, actually. My supplied-in-the-UK
ASR33 is 50Hz and has a
110V motor, and has a big transformer in the base to allow it to be
used on 240V AC mains. So have other UK models I've looked at.
Yup, Tony's made it clear that you folks in fifty-hurts land have a
transformer in the base. Strange, but true.
So, if the OP doesn't have one, he needs to find one.
--Chuck
9:30 p.m.
On 28 Jun 2012 at 20:59, dwight elvey wrote:
I don't have my manuals at hand but it seems that
I recall there
being a small transformer that provided the current for the local
mode operation.
Hasn't a step-down transformer that is made for use with power tools
in the UK been mentioned before? That would likely fit the need to a
"T". However, I don't know how easy it is to find NEMA receptacles
in the UK, should the owner wish to keep the original line cord
intact.
--Chuck
29 Jun
29 Jun
4:03 p.m.
Hasn't a step-down transformer that is made for
use with power tools
in the UK been mentioned before? That would likely fit the need to a
it would.
"T". However, I don't know how easy it
is to find NEMA receptacles
in the UK, should the owner wish to keep the original line cord
intact.
2 pin sockets are farily easy to find, 3 pin ones a bit harde. I think
either RS componetns or Farnell sell some types, but at very high prices.
Surely, though, you can fidn these on Ebay or at a US components uspplier
who will ship them. IOne socet it not large or heavy.
-tony
30 Jun
30 Jun
10:06 a.m.
However, I
don't know how easy it is to find NEMA receptacles in the
UK, should the owner wish to keep the original line cord intact.
2 pin sockets are
farily easy to find, 3 pin ones a bit harde. I
think either RS componetns or Farnell sell some types, but at very
high prices. Surely, though, you can fidn these on Ebay or at a US
components uspplier who will ship them. IOne socet it not large or heavy.
True.
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29 Jun
29 Jun
3:45 p.m.
On 29 Jun 2012 at 1:08, Pete Turnbull wrote:
To be fair, I said that all the machines I've seen/worked on have such a
transformer, and Pete Turnbull said the same thing about the machiens
he's seen. That makes it pretty likely that the OP's machine has a 110V
motor, but it's still not _certain_. There can always be a counterexample.
My guess is that hte same motots were used in the States and in Europe,
with differnet gearign to cope wit hthe differnt speed.. I'll check the
partsbook sometime.
Probably not, actually. My supplied-in-the-UK
ASR33 is 50Hz and has a
110V motor, and has a big transformer in the base to allow it to be
used on 240V AC mains. So have other UK models I've looked at.
Yup, Tony's made it clear that you folks in fifty-hurts land have a
transformer in the base. Strange, but true. So, if the OP doesn't have one, he needs to find
one.
A 110V step-down transformer (preferably isolating) is very useful to
have o nthe bench over here for testing/running US stuff.
If you don't mind having the output centre-tapped to ground (and I can't
see why an ASR33 would object!) then the power tool transformer I mention
from time to time is ideal.
-tony
28 Jun
28 Jun
10:49 p.m.
On 28/06/2012 18:02, Chuck Guzis wrote:
And the same goes for the danish models I've laid eyes on.
/Nico
On 28 Jun 2012 at 15:22, Sander Reiche wrote:
Probably not, actually. My supplied-in-the-UK ASR33 is 50Hz and has a
110V motor, and has a big transformer in the base to allow it to be used
on 240V AC mains. So have other UK models I've looked at.
Do you guys know of a failsafe way to check if a
Teletype is for 110
or 220V? I've bought one which has a power connector which seems like
US mains. The motor is 50Hz, but I guess that won't make a difference.
Any quick way to check without completely dismantling the machine?
If the motor is verifiably 50Hz, the probability is overwhelming that
it's 220V.
29 Jun
29 Jun
12:42 a.m.
On Fri, Jun 29, 2012 at 7:49 AM, <nico at farumdata.dk> wrote:
All this talk about the transformer in the base made my think. I
didn't get a base with this one, but did get a separate large
transformer. Now only to find the place within the ASR to put that
weird connector.
http://ls-al.eu/~reiche/220v4.jpg
re,
Sander
On 28/06/2012
18:02, Chuck Guzis wrote:
And the same goes for the danish models I've laid eyes on.
/Nico
On 28 Jun 2012 at 15:22, Sander Reiche wrote:
Probably not, actually. ?My supplied-in-the-UK ASR33 is 50Hz and has a
110V motor, and has a big transformer in the base to allow it to be used
on 240V AC mains. ?So have other UK models I've looked at.
Do you guys know of a failsafe way to check if a
Teletype is for 110
or 220V? I've bought one which has a power connector which seems like
US mains. The motor is 50Hz, but I guess that won't make a difference.
Any quick way to check without completely dismantling the machine?
If the motor is verifiably 50Hz, the probability is overwhelming that
it's 220V. 
30 Jun
30 Jun
12:59 p.m.
From: sander.reiche at gmail.com
On Fri, Jun 29, 2012 at 7:49 AM, <nico at farumdata.dk> wrote:
All this talk about the transformer in the base made my think. I
didn't get a base with this one, but did get a separate large
transformer. Now only to find the place within the ASR to put that
weird connector.
http://ls-al.eu/~reiche/220v4.jpg
re,
Sander
Hi Sander
I suspect that is a step down transformer but, from the connector,
most likely for some other piece of equipment. I'd plug the 220V plug
in and measure the output at the screw on connector with a meter.
If you want to save the cord with the 110v end, just cut that screw
on connector off and wire the end directly inside the 33. It sounds
like you'll be in bussiness.
Dwight
On
28/06/2012 18:02, Chuck Guzis wrote:
And the same goes for the danish models I've laid eyes on.
/Nico
On 28 Jun 2012 at 15:22, Sander Reiche wrote:
> Do you guys know of a failsafe way to check if a Teletype is for 110
> or 220V? I've bought one which has a power connector which seems like
> US mains. The motor is 50Hz, but I guess that won't make a difference.
> Any quick way to check without completely dismantling the machine?
If the motor is verifiably 50Hz, the probability is overwhelming that
it's 220V.
Probably not, actually. My supplied-in-the-UK ASR33 is 50Hz and has a
110V motor, and has a big transformer in the base to allow it to be used
on 240V AC mains. So have other UK models I've looked at.
29 Jun
29 Jun
2:35 a.m.
1. Use a Variac or 230v to 110v Auto transformer.
2. You will soon find out if its 110v or 230v
Regards
?
Rod Smallwood
?
-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
On Behalf Of Pete Turnbull
Sent: 29 June 2012 01:08
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Teletype ASR33 110 or 220V?
On 28/06/2012 18:02, Chuck Guzis wrote:
On 28 Jun 2012 at 15:22, Sander Reiche wrote:
Probably not, actually. My supplied-in-the-UK ASR33 is 50Hz and has a
110V motor, and has a big transformer in the base to allow it to be used
on 240V AC mains. So have other UK models I've looked at.
--
Pete Peter Turnbull
Network Manager
University of York
Do you guys know of a failsafe way to check if a
Teletype is for 110
or 220V? I've bought one which has a power connector which seems like
US mains. The motor is 50Hz, but I guess that won't make a difference.
Any quick way to check without completely dismantling the machine?
If the motor is verifiably 50Hz, the probability is overwhelming that
it's 220V.
28 Jun
28 Jun
1:11 p.m.
Hi all,
Do you guys know of a failsafe way to check if a Teletype is for 110
or 220V? I've bought one which has a power connector which seems like
US mains. The motor is 50Hz, but I guess that won't make a difference.
Any quick way to check without completely dismantling the machine?
Every ASR33 I've seen (and I am in the UK) has had a 110V motor. The
'call control unit' in a Teletype modelk 33 was designed for 110V mains
too. The UK modles genrally had a 240V-110V (or 230V-115V, or whatever)
autotransformer in the stand.
There was a UK machine called a Data Dynamics 390. It used ASR33
mechancials with their own call cotnrol unit. This ran off 240V mains,
but the motor was still 110V. The mains transformer in the call control
unit provided the motor supply.
So I think it's a safe bet to assuem your machine is for 110V mains.
-tony
29 Jun
29 Jun
2:17 a.m.
On Thu, 28 Jun 2012, Sander Reiche wrote:
Hi all,
Do you guys know of a failsafe way to check if a Teletype is for 110
or 220V? I've bought one which has a power connector which seems like
US mains. The motor is 50Hz, but I guess that won't make a difference.
Any quick way to check without completely dismantling the machine?
Things are not so simple. A look in the parts list 1184B for the teletype
shows that there were 5 different motors. The parts list on bitsavers
is that from 1973. It has only 4 motors. Our parts list from 1974 shows
a "new" 5th motor.
Motors:
182241 1.6 Amp 60Hz
182267 1.7 Amp 50Hz
181870 2.0 Amp 60Hz
181861 0.8 Amp 60Hz (No longer available, use 181870)
and the 5th motor:
183991 (no data given)
from the picture, this motor seems to have a centrifugal governor.
So it is eventually adjustable for 50/60 Hz.
From the Amperage, the 181861 seems to be a 220V motor, which seems
strange in conjunction with 60Hz. Perhaps a typo? But these data is
identical in the 1973 and in the 1974 catalogue.
And to make things even more difficult, there is a second table for
pairs of gear sets which are to be used for different motors and
transmission speeds.
The given speeds long from 60 to 100 WPS.
Another fact: In some of our 220V 50Hz machine there are step down
transformers in the piedestal, in some not. Maybe that those machines
were feed from step down transformers in the 19"-rack of the
computermachinery they were used with.
Klemens
--
klemens krause
http://computermuseum.informatik.uni-stuttgart.de
4:12 p.m.
Teletype motors]
183991 (no data given)
from the picture, this motor seems to have a centrifugal governor.
So it is eventually adjustable for 50/60 Hz.
It might even be a DC motor. I am pretty sure that Creed teleprinters,
etc were avaialve eith DC motors (often 24V), the military used them 'in
the field'.
The governor for the DC motor is odd. The motor is shunt-wound and the
governor _increases_ the field current when it's up to speed. That wil
slow down such a motor (yes, I know why, but it still seems odd the
first time you come across it).
-tony
4510
days inactive
4512
days old
19 comments
9 participants
participants (9)
-
ard＠p850ug1.demon.co.uk -
cclist＠sydex.com -
dkelvey＠hotmail.com -
krause＠informatik.uni-stuttgart.de -
mouse＠Rodents-Montreal.ORG -
nico＠farumdata.dk -
pete＠dunnington.plus.com -
rodsmallwood＠btconnect.com -
sander.reiche＠gmail.com