[GreenKeys] ZZZZ or ZCZC?

[Steve Garrison]

The ZCZC was at the beginning of a message so that the "Tape Apes" could easily identify the beginning of a message from the hole patterns.  At least that's my story and I'm sticking to it!

Here is what the hole pattern of ZCZC would look like:  see attachment

And here is a link to a TTYPUNCH simulator: http://www.kloth.net/services/ttypunch.php

Steve G./N4TTY


-----Original Message-----
From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net> On Behalf Of E.
Sent: Wednesday, October 16, 2019 1:48 PM
To: greenKeys Robert Downs via <greenkeys at mailman.qth.net>
Subject: [GreenKeys] ZZZZ or ZCZC?


Hey all,

I’ve been trying to look this up - hard to come by ;p .  I know at the end of a Teletype message - on some circuits, end of message is NNNN… but what about the beginning?  I’ve seen both ZZZZ and ZCZC… wondering - for those who know, what is the difference between the two ;o ???

Thanks in advance ^^ !~
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