26 Mar
2021
26 Mar
'21
1:29 p.m.
On Mar 26, 2021, at 3:38 PM, Bill Degnan via cctalk
<cctalk at classiccmp.org> wrote:
On Fri, Mar 26, 2021 at 3:35 PM Al Kossow via cctalk <cctalk at classiccmp.org>
wrote:
The most common widths are for 5 ("baudot") and 8 (ascii) tape, which have that
number of tracks plus a sprocket track on 0.1 inch centers, closely filling the available
space. But there is also 6-track tape (for typesetting machines) and 7 track (for some
very old machines) that have paper width to match -- same track spacing, different track
count. Those are rarely seen but specs for them can be found, I tripped over them not too
long ago.
Then for something nice and obscure there is 2-track tape ("Wheatstone") for
punched Morse code. Creed and MacElroy (in Littleton, MA) made machines for that.
paul
On 3/26/21 12:31 PM, Guy Fedorkow via cctalk
wrote:
Is it baudot width? If so someone in the Greenkeys mailing list can help.
Or they'd be able to help regardless. I can print standard 1 inch tapes, I
have a working Teletype right here in my office. Because that's what
normal people have, right? wow, what format?
The codes I'm punching should line up with a long-dead machine,
Whirlwind from MIT, so I think you'd consider them to be 7-track binary,
i.e., same size as an 8-track teletype tape with one track blank
Real Whirlwind tape is narrower than standard 1" paper tape.
The reason I have not offered to do this is the blank tape that I
have would not be period correct, nor the right width.