[GreenKeys] Tell me about TTY Line Length

[Russ Miller]

If you are interested in RTTY Art, I suggest setting a line length of 72
characters.  Telex machines, i.e. i-Telex network machines, are set to 68
or 69 characters,

Changing the line length on a Teletype Model 28 machine is easily done. Irv
Hoff described this in an early 1970s RTTY Journal article.  I've
simplified the process here:

To adjust the return character, locate the spacing drum and the five bolts
holding the front and rear rings to the spacing drum.  Going clockwise, you
will see that the first, third and fifth are all round-head bolts.  The
second and fourth are hex-head bolts.  You have to slightly loosen, but not
remove, the first, second, third and fifth bolts to adjust the right hand
margin adjustment. .Take a screwdriver and slightly move the rear ring that
is attached to the spacing drum.  Move the ring counterclockwise to
lengthen the line length. You don’t have to move the ring very far, so go
slowly.  Temporarily tighten the bolts that you loosened and try the line
length test until you get the desired line length.

73
Russ WA3FRP



On Thu, Apr 16, 2020 at 4:01 PM Ralph Irish <w8roi at wowway.com> wrote:

> Model 28s can have a wider line.  Just a matter of loosening something,
> pulling the carriage or typebox then tightening
> that same thing.  I had a friend who could bet up to 25 points of range at
> 100 WPM with an 80 character line and not
> have any overstrikes or other mistakes.  This was assuming the station
> sending was using  CR  CR  LF  LTRS at the
> end of each line.  At 60 WPM the LTRS could be left off the end of line
> sequence.
>
> This result also assumes no heavy wear on some 'key components'.
>
> 68 characters is probably correct, and if the machine can handle 72
> characters, this gives the 'typist' some leeway about
> formatting.
>
> As for the 15 printer I don't know the maximums.  I owned both a 15 and a
> 19, but remember very little about them.
> They both did what they should and gave me great service.  Never had to
> touch any adjustments.
>
> Good luck!
>
> Ralph - W8ROI
>
> -   -   -   -   -   -   -   - *From: *"ad7i" <ad7i at ad7i.net>
> *To: *"greenkeys" <greenkeys at mailman.qth.net>
> *Sent: *Thursday, April 16, 2020 3:28:13 PM
> *Subject: *[GreenKeys] Tell me about TTY Line Length
>
> Greetings --
>
> In testing my model 15 and 28RO, it looks like both will print 72
> characters per line.  But buried deep in my brain, from some long forgotten
> place, I seem to recall that the max TTY line length was 68 characters.
>
> So my question for my fellow TTY enthusiasts is, when preparing text for
> transmission by TTY, what's the recommended line length to use, and why?
>
> 73, Paul, ad7i
>
>
>
>
>
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