[GreenKeys] ZZZZ or ZCZC?

[E.]

The reason I was confused was because of the Teletype bulletins seen further down in this PDF here from the Weather Service:

https://www.weather.gov/media/publications/assessments/Omaha%20Tornado%201975.pdf

…but if ZZ means Flash, then that might explain why they are used here (in the link above).


> On Oct 16, 2019, at 3:09 pm, Sheldon Daitch <sheldondaitch at yahoo.com> wrote:
> 
> Jim,
> 
> That could very well make sense, for in the formatting, as I remember it,
> the formal message traffic would have several CRs, then LFs followed by the 
> NNNN sequence.
> 
> What I don't know, was exactly what was encoded in the mechanical stuntbox
> for the M28 systems.
> 
> Sheldon
> 
> On Wednesday, October 16, 2019, 04:04:38 PM EDT, Jim Haynes <jhhaynes at earthlink.net> wrote:
> 
> 
> 
> In some of the W.U. Plan 55 logic the required end of message was
> LF preceding the NNNN
> 
> 
> On Wed, 16 Oct 2019, Sheldon Daitch via GreenKeys wrote:
> 
> > Years ago, on the VOA RTTY circuits, we used FAXFAX as the start of tape
> > punching code.  
> > 
> > NNNN was used to turn off the tape punch, but actually, the coding was NNN,
> > but all four Ns
> > were used, in the event of a garble.