[GreenKeys] GreenKeys Digest, Vol 102, Issue 29

[Sheldon Daitch]

As I recall, all of the M-28 equipment we had at VOA
had some type of line monitor.  I am thinking it was
built into the equipment and was not an external box,
but I hadn't seen any of this equipment in about 25 years.

73
Sheldon


On 7/12/2012 7:40 AM, Ralph Irish wrote:
> George and others:
>
> Another device which was on some Model 28 equipment which did the same thing as the
> "Idle Line Monitor" described below was an all mechanical device somewhere on the
> keyboard of the 28.  It had some gears which incrementally cranked something for a
> predetermined amount of time, and when it got to the end of the 'cranking', it would
> open a switch in series with the motor circuit.  It was also sensitive to the loop
> current, and any Start signal (or a static burst, for that matter) would bypass that
> contact which broke the motor circuit and the motor would start again.
>
> We copied the Fleet Broadcast, (Foxtrot Romeo) from the west coast, and any time that
> they ran out of traffic and didn't want to send the "RY/SG" test signals, these
> gadgets would stop the printers after a minute or two.
>
> THESE WERE DEVICES MADE BY TELETYPE, AND EVERY MODEL 28 KSR I EVER SAW ABOARD THE
> USS HANCOCK HAD ONE, including the two printers up on the Aerology deck.  The only
> downside was that when the machine came back to life, you might miss a character or
> two, but that startup was usually five spaces, two carriage returns and a line feed.
> Only on rare occasions would you possibly miss the "FR" number, which was no big deal.
> They were sequential and it was usually easy to find the prior message torn off the
> machine and check the next one after the missing number for verification.
>
> Ralph - W8ROI
> RM on the USS Hancock, CVA-19, May 1959 - March 1961
> (Any of this sound familiar to anyone?)
>
> While we're at it, does anyone remember what Alpha One Alpha was?  (A1A)?
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 11 Jul 2012 11:42:34 -0700
> From: "George B. Hutchison" <w7tty at centurylink.net>
> Subject: Re: [GreenKeys] ASR33 autostart
> To: <greenkeys at mailman.qth.net>,	"Nico de Jong" <nico at farumdata.dk>
> Message-ID: <812CA6E0701947D2AFDEA2D3E91A9243 at MAINCONSOLE>
> Content-Type: text/plain;	charset="iso-8859-1"
>
> Nico - - -
>
> You need a box commonly used in the days of yore called an "Idle
> Line Motor Control". Pulse Com was one manufacturer that comes to
> mind, but there were many otjhers.
>
> It simply monitors a current loop for actiivity, and after sensing
> none for a predetermined amount of time, shuts off power to the
> machine.
>
> As soon as it senses even the slightest keying on the loop, it turns
> on the motor and keeps it running until the next idle period exceeds
> the setting programmed into it, and poof, it shuts the motor off
> again.
>
> I have two or three of them around here somewhere, and it's almost a
> certainty that collectors of "stuff" like Jack Hart or Don House
> probably have some sequestered somewhere in their massive piles of
> "Stuff".
>
> I'll look around here today.
>
> W7TTY
>
>
>
>
> ------------------------------
>
>
>
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