[GreenKeys] Physical tape format question

[John Nagle]

> Message: 8
> Date: Tue, 09 Mar 2010 10:39:10 -0600
> From: dmm at lemur.com
> Subject: [GreenKeys] physical tape format question
> To: greenkeys at mailman.qth.net
> Message-ID: <201003091636.CVE92932 at rg6.cniteam.com>
> 
> 
> Ok, here's an actual TTY question (vs. a Linotype matter):
> 
> Was the relative spacing of the holes and drive-sproket holes
> (correct me if I have my terminology wrong!) the same in 
> 5, 6, and 8 level tape, or did it differ between them?
> 
> In other words, if I should run across an 8-level punch, would it
> be possible to make tape-guide adapters for it to allow it to punch
> the narrower 5 or 6 level tape, or would the spacing be off?

    Yes, 5, 6, 7 and 8 level paper tape are all compatible in
that sense.  There were computer readers with adjustable guides
which could read all of them.

    5 level - Baudot teletype
    6 level - Teletypesetter, Flexowriter, post-1930 stock ticker
    7 level - Burroughs computers
    8 level - ASCII devices

					John Nagle