[GreenKeys] Modems, CCU's and Tractor feed issues

Fri Jan 3 06:23:17 EST 2014

Hmm, looks like they are good for standard paper but can't find any paper tape.

Does anyone on the list know of a source for paper tape in the UK or elsewhere in Europe suitable for ASR33 - 1" preferably oiled?

Nick

-----Original Message-----
From: Robert Jarratt [mailto:robert.jarratt at ntlworld.com]
Sent: 03 January 2014 12:09
To: Nick Jarmany
Cc: greenkeys at mailman.qth.net
Subject: RE: [GreenKeys] Modems, CCU's and Tractor feed issues

I only looked for the sprocket feed paper, which came from paperstone.co.uk, this is the one I bought:

http://www.paperstone.co.uk/prod_25772_2508-3574-6545_Computer-Listing-Paper
-1-Part-11inch-x-216mm-Unperforated-Plain-White-2000-Sheets.aspx

Regards

Rob

> -----Original Message-----
> From: Nick Jarmany [mailto:nick.jarmany at quixant.com]
> Sent: 03 January 2014 10:38
> To: Robert Jarratt
> Cc: greenkeys at mailman.qth.net
> Subject: RE: [GreenKeys] Modems, CCU's and Tractor feed issues
>
> Rob,
>
> Can you let me know where in the UK you found your supplies? Was that
> for 1" paper tape as well as typing roll?
>
> Nick
>
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-
> bounces at mailman.qth.net] On Behalf Of Robert Jarratt
> Sent: 29 December 2013 10:53
> To: 'John Ball'; greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Modems, CCU's and Tractor feed issues
>
> I too have a tractor feed, I am pretty new to 33 restoration so I may
> have
this
> completely wrong, but your problem with constant line feed sounds like
> the form feed mechanism becoming engaged somehow. I have the opposite
> problem that the line feed mechanism does not work at all. It has been
> a little while since I looked at this now and I no longer recall the
details, but
> that might be a good place to start looking.
>
> As for paper, I am in the UK and I did manage to find a supplier here.
> I
seem
> to recall there being a supplier in the US too, it should be just a
> matter
of
> spending a bit of time with your favourite search engine.
>
> Regards
>
> Rob
>
> > -----Original Message-----
> > From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-
> > bounces at mailman.qth.net] On Behalf Of John Ball
> > Sent: 29 December 2013 08:55
> > To: greenkeys at mailman.qth.net
> > Subject: [GreenKeys] Modems, CCU's and Tractor feed issues
> >
> > No offense but it took a while to figure out how to subscribe to the
list.
> > ;)
> >
> > So anyways, a few months ago I became the owner of a Marsland
> rebadged
> > model
> > 33 ASCII mode teletype. Came with the console module, the tractor
> > feed option for 8 1/2" paper (Where the heck do you even find that
> > now???) and the UCC-21 rotary dial CCU with external PSU for the
> > paper tape
> reader.
> > Unfortunately it didn't come with a pedestal so I had to fabricate a
> > new
> one
> > and find a replacement chad bucket. While it's nice having the
> > console module I want to use the CCU instead and hang a modem off that.
> > Unfortunately I cannot find any documentation on how the CCU would
> > of interfaced with the old 110 baud Bell 110 modems. Was it really
> > just
> current
> > loop? I can see that the later 103 modems had some sort of D-sub 25
> > connection (god knows if that was RS-232 or something) but those are
> > 300 baud and too fast. I have however found a few modems that still
> > support
> the
> > Bell 101 110 baud standard. The original Smartmodem is one of them
> > however they are all RS-232 and the the teletype is very much a
> > current
> loop
> > device.
> > If I just attached it with a current loop adapter I would be
> > entering commands directly from the keyboard and not usig the CCU.
> > At a quick glance (and again, if the documentation and interfacing
> > info was available
> I'd
> > love to read it) I can see that it's really just a telephone with no
> handset.
> > There's a buzzer to indicate ringing, the rotary dial is for
> > starting the
> call and
> > the four buttons are for turning the teletype and modem on and off,
> putting
> > the modem off hook, setting the teletype to local mode only and
> > putting it back on hook. Any information on this would be very much
> appreciated.
> > Really it's just a remote control for the modem when it was stored
> > in the pedestal. If I knew how it worked I could use a
> > microcontroller to
> translate
> > button pushes into hayes commands so I can simulate the original
> > experience.
> > Another problem I ran into shortly after I got the machine was that
> > the tractor feed was slipping badly in a particular manner. If you
> > did a line
> feed
> > and any time after you had done that you press the comma key the
> > machine will constantly line feed until the cam lobe's high point on
> > the tractor
> feed
> > pushes a lever up again. There's like three or four different
> > linkages
> that
> > might be problematic but it's nearly 1AM and I can't rememebr their
> names.
> > If it helps I have the service manual for the teletype with three or
> > four
> extra
> > pages covering the tractor feed option. Might anyone off the top of
> > their heads know what might need to be adjusted?
> >
> > -John
> >
> >
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Quixant plc. Registered in England No. 4316977
Registered Address: Aisle Barn, 100 High Street, Balsham, Cambridge, CB21 4EP, UK

Quixant UK Ltd. Registered in England No. 8383675
Registered Address: Aisle Barn, 100 High Street, Balsham, Cambridge, CB21 4EP, UK
________________________________

The information contained in this message as well as any attachments is confidential and is only intended for the person(s) to whom it is addressed. The contents may be subject to a non-disclosure or confidentiality agreement. If the reader of this message is not the intended recipient or you have received this communication in error, please be aware that any dissemination, distribution or duplication is strictly prohibited, and can be illegal, and please notify us immediately and return the original message to us at the address above. The views and opinions expressed in this e-mail message are the author's own and may not reflect the views and opinions of Quixant.