[GreenKeys] Can anyone identify this machine

Fri Mar 2 11:00:16 EST 2018

I assume that is an original version from which the GPO version was 
produced?

I see it says Teletype and Western Union on the labels.

Do you know the date of it?

Martin

On 02/03/2018 15:21, Nick wrote:

> Yes, you are right, 60 ma.
>
> Enclosed a few pics of my restored 2-A printer.
>
> Nick  -  N0NCQ
> i-Telex  212503
>
>
>
> Sent from my T-Mobile 4G LTE Device
> -------- Original message --------
> From: Martin <strowger at aeolian-hall.myzen.co.uk>
> Date: 3/2/18 9:59 AM (GMT-05:00)
> To: Greenkeys email list <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] Can anyone identify this machine
>
> Eric
>
> Unfortunately I dont.
>
> I normally use an ST5 .
>
> What sort of loop does it produce? Here its generally 20 Ma using 80
> volts, I believe you are on 60 ma. I have no idea as yet what the No 2A
> needs, it could be it came with standard American coils or maybe one of
> the GPO mods was for 20 ma.
>
> I am currently looking at a HAL ST5000 which I have pulled out of my
> pile of demodulators which appears to do both high and low tones, but
> unfortunately produces a 60 ma loop. I am hoping to get around that by
> using the FSK output which is alleged to be RS232 levels, to drive the
> similar input to my ST5. But for some reason the FSK out doesnt seem to
> be working, I need to get it onto the bench. If I could get this to work
> it would mean I can copy the ITTY and AUTOSTART broadcasts too.
>
> I suppose with suitable software I could also do it using your converter?
>
> But I do quite like doing it the "old fashioned way" as far as possible!
>
> Martin
>
> On 02/03/2018 00:12, Eric wrote:
>
> > If you happen to have one of my usb serial to current loop adapters, 
> we can probably come up with a translation map that would work!
> >
> > On March 1, 2018 6:55:39 PM EST, Martin 
> <strowger at aeolian-hall.myzen.co.uk> wrote:
> >> As I became the lucky winner of this item, I can now shed light on the
> >> answer to this question.
> >>
> >> It is indeed a GPO Teleprinter No 2A and built around 1925 according to
> >>
> >> the label. The condition is not at all bad really, apart from the
> >> keytops which are not the end of the world. Its also missing a few
> >> things like a switch and a bell end of tape alarm and the tape reel
> >> cover, but otherwise looks like it will be a nice TLC project. I was
> >> very pleased to get it as it must be a very rare machine to find and
> >> cost very little, even including shipping from East Scotland, I wonder
> >> how many survive? It was hard to find references to GPO machines of
> >> this
> >> age, but I was able to find a good chapter on it in Herberts
> >> Telegraphy,
> >> dated 1930. This fully explains the details of operation so faulting
> >> and
> >> maintenance should be no problem. It even came with a reel of narrow
> >> paper tape to fit which is a bonus. This book covers all GPO
> >> Teleprinters 1 to 5, and seems to be a unique reference. Does anyone
> >> know if a GPO Teleprinter No 6 existed? I cannot recall.
> >>
> >> It is more precisely a Typebar Teletype and was developed from the
> >> Typewheel Teletype manufactured by Morkrum Kleinschmidt, known by the
> >> GPO as Teleprinter No 1A.  The double space bar was one of several
> >> modifications the GPO requested to be compatible with earlier models.
> >>
> >> The code differs slightly from standard Baudot Telex code and this
> >> seems
> >> to be tied in with the double space bar feature. The letters are all
> >> standard but the figures case is different except the numbers. There
> >> are
> >> a number of characters of the form "1/" "3/" etc, and I cant think what
> >>
> >> they were used for. Important differences though are the Letters shift
> >> which becomes "/", CR and LF which become "+" and "-" and space becomes
> >>
> >> Letters shift.
> >>
> >> As I interpret the description of operation, there is only one code
> >> that
> >> produces a non printing "no advance" of the tape, and that function
> >> maybe available only from the keyboard. I dont know which key as the
> >> markings are missing.
> >>
> >> So every character advances the tape, and that is why Letters and
> >> Figures shifts can also be spaces, as these are the only other non
> >> printing codes. Driving this machine from a Baudot coded machine is
> >> going to require some careful thought! At the end of a line one will
> >> get
> >> a "+-" . Every Letters shift will produce a "/" but Letters will be
> >> re-selected by every space! Figures will act normally.
> >>
> >> Fun times ahead.
> >>
> >> Martin
> >>
> >>
> >> On 20/02/2018 09:16, John Nagle wrote:
> >>
> >>>> From: "Alf Fisher"<alffisher2 at gmail.com>
> >>>> Subject: [GreenKeys] Can anyone identify this machine
> >>>>
> >>>> Please can anyone identify this machine.
> >>>>
> >>>> 73, Alf, G3WSD
> >>>>
> >> 
> URL:<http://mailman.qth.net/pipermail/greenkeys/attachments/20180219/5f2a44d7/attachment-0001.jpg>
> >>
> >>> That's an unusual machine. It's basically a Teletype Model 14 tape
> >>> printer.  I have several of those.  But for some reason, it was built
> >>> as a modified machine to print on the tape usually used in
> >>> reperforators.  It's not a reperforator; there's no punch
> >>> mechanism.  Nor is it a reperforator from which the punch has
> >>> been removed.  The tape feed mechanism and shift system are
> >>> like a Model 14 (the tape position shifts), and the tape
> >>> guides are similar to, but wider, than those for the standard
> >>> 5/16" or 3/8" tape.
> >>>
> >>> Notice the two spacebars.  That's very unusual.
> >>>
> >>> It looks repairable.  Worth repairing as an exotic
> >>> variant. What typebars does it have? Punctuation?
> >>> Fractions?  Weather symbols?
> >>>
> >>>                  John Nagle
> >>> ______________________________________________________________
> >>> GreenKeys mailing list
> >>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> >>> Help: http://mailman.qth.net/mmfaq.htm
> >>> Post: mailto:GreenKeys at mailman.qth.net
> >>>
> >>> 2002-to-present greenkeys archive:
> >>> http://mailman.qth.net/pipermail/greenkeys/
> >>> 1998-to-2001 greenkeys archive:
> >>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> >>> http://comcents.com/tty/greenkeyssearch.html
> >>>
> >>> This list hosted by: http://www.qsl.net
> >>> Please help support this email list: 
> http://www.qsl.net/donate.html <http://www.qsl.net/donate.html>
> >>>
>
> -- 
> --
> CNET Honeybottom 5290
> http://www.ckts.info/192/uk
>
> This Email personally scripted by: Martin (G8UDJ)
> The Strowger aficionado's site is at 
> http://www.aeolian-hall.myzen.co.uk <http://www.aeolian-hall.myzen.co.uk>
>
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
>
> 2002-to-present greenkeys archive: 
> http://mailman.qth.net/pipermail/greenkeys/ 
> <http://mailman.qth.net/pipermail/greenkeys/>
> 1998-to-2001 greenkeys archive: 
> http://mailman.qth.net/archive/greenkeys/greenkeys.html 
> <http://mailman.qth.net/archive/greenkeys/greenkeys.html>
> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: 
> http://comcents.com/tty/greenkeyssearch.html 
> <http://comcents.com/tty/greenkeyssearch.html>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

-- 
--
CNET Honeybottom 5290
http://www.ckts.info/192/uk

This Email personally scripted by: Martin (G8UDJ)
The Strowger aficionado's site is at http://www.aeolian-hall.myzen.co.uk

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20180302/a71abd87/attachment.html>