[GreenKeys] Teletype Code Diagram source?

[Richard Knoppow]

----- Original Message ----- 
From: <dmm at lemur.com>
To: <greenkeys at mailman.qth.net>
Sent: Thursday, May 17, 2012 10:56 AM
Subject: Re: [GreenKeys] Teletype Code Diagram source?


>
>>Alf Fisher wrote:
>>> The 'Teletypewriter Code' table is from Freebody Chapter 
>>> 1 page 10.
>
> Well, an almost identical table does indeed appear on p. 
> 10 of Freebody.
> Here's a photograph of that page:
>
> http://www.galleyrack.com/temp/freebody-1958-p010.jpg
>
> But if you compare it to the table at:
>
> http://www.nadcomm.com/fiveunit/fiveunits.htm
> http://www.nadcomm.com/fiveunit/figure5.gif
>
> it isn't quite the same.  In particular, look at the line 
> formatting
> on the second footnote.  This wouldn't matter at all if 
> one were
> just looking for data, but the question had to do with 
> finding the
> literal source.
>
> It would be reasonable, I would think, to conclude that 
> Freebody
> copied this table (which contains pretty standard 
> information)
> from some other source, and that the literal image in 
> Hobbs' paper
> comes from some source other than Freebody.
>
> (Unless there was an edition of Freebody other than this 
> 1958 one
> and that edition was typeset differently.)
>
> This may end up helping your author, since the 1958 
> edition of Freebody
> will be in copyright in the US until 2053 and in the UK 
> until 75 years
> after Freebody's death.
>
> Regards,
> David M.
> ===
> Dr. David M. MacMillan  -  dmm at lemur.com

     I think you can find what you want at:

http://www.tubebooks.org/technical_books_online.htm

Look for the 5th edition of _Reference Data for Radio 
Engineers_  at the bottom of the General Engineering 
section.  The book has charts on P.844 and 845 showing both 
the codes and keyboard charts.  It has code for 7-unit 
Teletype, 5-unit CCIT 2, and ARQ 7-unit Moore code (used by 
RCA).
     The opposite page has the upper case character chart 
for 10 different codes.  It does not have the weather code. 
I have that penciled in to my copy but am not sure the 
special characters can be sent via computer.
     AFAIK, all the stuff on Pete's site are in public 
domain.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com