[GreenKeys] Fwd: TYYs and the Emergency Broadcast System

[Ralph Irish]

Sorry the .jpg photo did not transfer.  I will try again below with a smaller version of it in
a different graphic format.

Ralph

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Begin forwarded message:

> From: Ralph Irish <w8roi at wowway.com>
> Date: November 17, 2017 1:55:25 PM EST
> To: Paul Birkel <pbirkel at gmail.com>
> Cc: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] TYYs and the Emergency Broadcast System
> 
> After seeing recent mentions of EBS and CONELRAD, I e-mailed a ham friend who worked for the CBS-TV
> station in the Metro Detroit Area, WJBK-TV (Channel 2).  I got a note back from him that I will
> paste below:
> 
> From: 	Jim Prest <jimprestv2 at gmail.com>
> 	Subject: 	Re: [GreenKeys] TYYs and the Emergency Broadcast System
> 	Date: 	November 17, 2017 9:31:26 AM EST
> 	To: 	Ralph Irish <w8roi at wowway.com>
> 
> Hi, Ralph.
> 
> Yes, the UPI and AP machines (Model 15s) each had a contact that closed
> each time the bell rang.  Originally it just flashed a light in the news
> room  by the dispatcher's desk.  After we moved to Southfield in 1972 we
> got a little box with a stepper relay in it that counted the contact
> closures and when it counted ten "dings" it latched a relay and sounded
> an alarm. In the case of a weather alert it was three rings (I think).
> I remember installing the little boxes on the machines and building a
> remote display panel for the Master Control operator since there was
> someone in MCR 24  hours a day but the news room went home after the
> 11:00 news.  I still have the panel and had the counter boxes but can't
> find them. After a few years the Teletype machines were replaced with a
> dot-matrix printer that had the circuitry inside.  Also started "manning"
> the  news room 24/7.  After we moved the MCR to a different location
> the panel was unnecessary so I brought it home.  
> 
> Trust this answers your question.
> 
> 
> 
> 
> 
> His description above pretty well sums up that system for his station, but Jim said
> he would try to answer any questions that might come up.  Address him directly to
> the e-mail address in the header above.
> 
> For now,
> 
> Ralph - W8ROI
> 
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> 
> 
> On Nov 16, 2017, at 1:15 PM, Paul Birkel wrote:
> 
>> https://hackaday.com/2017/11/16/radio-apocalypse-the-emergency-broadcast-system
>>  
>> “The EBS system did take cues from CONELRAD, though. The basic architecture was the same — to create one nationwide network that the government could use to transmit consistent messages and instructions quickly and efficiently. Linking the national carriers into a single network was initiated by a teletype message with codeword authentication to primary stations like the Big Three networks and news services like UPI and AP. To get the attention of station employees tasked with monitoring teletypes in station newsrooms often full of the clattering devices, this Emergency Action Notification (EAN) was preceded by a line of X characters and a bunch of control-Gs to sound the teletype’s bell.”
>>  
>> Does that pre-EAN pattern sound right?  Anyone here with hands-on experience servicing these sorts of messages?
>>  
>> -----
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