[GreenKeys] Sprocket feed paper

[w9ddd at tapr.org]

Ralph, I'm on trip and will be back home on the 10th.

Common sprocket feed used on dot matrix printers in the last century, is 9.5 wide with sprocket hole 9" apart.  When you rip the edges you get 8.5" wide X 11" long sheets. Strangely I still have some of that.  Seems it outlasted the printer. 

Older version for teletype and other antiques is 8.5" wide with sprocket holes 8.0" apart and generally did not have tear off edges. 

John, W9DDD
Copied to list in case my memory has failed me on the details.

> On Nov 29, 2019, at 11:35 AM, Ralph Irish 
> 
> 73,
> 
> Ralph - W8ROI
> 
> 
> -   -   -   -   -   -   -   - 
> 
> From: w9ddd at tapr.org
> To: "ad7i" <ad7i at ad7i.net>
> Cc: "greenkeys" <greenkeys at mailman.qth.net>
> Sent: Friday, November 29, 2019 7:53:31 AM
> Subject: Re: [GreenKeys] Stunt box operation
> 
> This will be good info for me because I eventually have to get a sprocket feed typer  going.  It's  been on the back burner due to lack of paper
> 
> John, W9DDD
> 
> 
> On Nov 29, 2019, at 7:29 AM, ad7i <ad7i at ad7i.net> wrote:
> 
> Hi Jeff --
> 
> In my particular case, for the horizontal spacing in response to an ampersand, the type box moves rapidly over to the right, just like hitting the tab function on a typewriter.  The TTY does not function (in the time domain) like the selector magnets received 14 space chars.  So far it's always been 14 characters, but I haven't done a lot of testing with that to confirm.  I'll try that later today.  I do know that the right side cable wheel on the front of the typing unit has some flanges that stick out on the front of it about 1/4 inch, like it might be for tab stops, but I don't see an actuator that would engage or stop based on the position of those flanges.  I should probably open the housing cover and watch it as I send it some ampersand characters, to see if I can understand the operation of the tabbing function.
> 
> Paul, ad7i
> 
> 
>> On Fri, Nov 29, 2019 at 7:18 AM Jeffrey Angus <jdangus at att.net> wrote:
>> Separate from Paul's question.
>> 
>> Two things:
>> 1. In Paul's case, " results in 14 spaces or so.
>> Is that actually 14 spaces or does the 28 have a "If I get a
>> tab request, I index the carriage x inches?"
>> Does the sending station know to wait for all 14 spaces
>> before sending the next character?
>> 
>> 2. Can the stunt box decode sequential characters. I.e., if
>> I hear this, and then this, do this?
>> 
>> -- 
>> "I am a river to my people."
>> Jeff-1.0
>> WA6FWI
>> www.foxsmercantile.com
>> 
>> 
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