[GreenKeys] [Fwd: RTTY - reforming the autostart group from the1970's]

[Larry Tighe]

Tony,

Where does the SelCal unit come from?  Home brew, surplus?

Lar

----- Original Message ----- 
From: "tony j. podrasky" <hunybuny at eskimo.com>
To: "Green Keys" <greenkeys at mailman.qth.net>
Sent: Friday, April 14, 2006 22:22
Subject: [GreenKeys] [Fwd: RTTY - reforming the autostart group from 
the1970's]


> Hey Guys;
>
> I posted this to rec.amateur.radio.
>
> I'll let you know if I get any responses.
>
> 73,
> W6ESE
> NNNNZCZC
>
> -------- Original Message --------
> Subject: RTTY - reforming the autostart group from the 1970's
> Date: Fri, 14 Apr 2006 19:21:03 -0700
> From: tony j. podrasky <tonyp at m2404txp.nsr.hp.com>
> Reply-To: W6ESE <w6ese at arrl.net>
> Organization: Eskimo North www.eskimo.com (800) 246-6874
> Newsgroups: rec.radio.amateur
>
> GE OMs.
>
> Back in the dim-times of digital communications there were a
> handfull of amateurs that had their Teletype machines set up
> on 14.075 MHz.
>
> They sat on the channel waiting for RTTY traffic from the
> members that were scattered all over the US, Canada, and
> even abroad.
>
> The machines were left running (and pretty much unattended),
> 24 hours a day until the OP came home, read the traffic, and
> fired-off a response. There were QSO's that took place where
> the two OPs were never there at the same time.
>
> Many of these machines had WRU (Who aRe yoU?) capabilites that
> you could access. When the correct sequence was sent the
> machine would kick-in the transmitter and activate an ANSWERBACK
> that would usually send a CWID (FCC mandatory for RTTY operations
> back in those days) or just the station call letters and maybe
> the abreviation of the state/province. When you got a response
> you could tell that the machine was online and responded, and
> get an idea as to the band conditions.
>
> All the machines had SELCALS (SELective CALling devices) that
> would activate the machine only when the OP's call letters came
> thru, or a sequence like "space DE space" - when kept the machines
> from spewing out paper by the mile when QRN was high. All
> transmissions would end with a "NNNN" sequence which would reset
> all the machines on the channel.
>
> We're trying to get this group back together - or rather, form a
> new one. Right now we're hanging out on 14.084.100 Mhz, plus a
> MARK frequency of 2125 Hz - depending on how your transmitter is
> set up.
>
> The only thing needed is a setup that will send 5-level code at
> 45.45 baud, right-side-up, and being able to zerobeat the frequency.
>
> If you're interested, follow-up here or send e-mail to me.
>
> 73,
> tony
>
> W6ESE
>   @
> arrl.net
>
> --
> Tony J. Podrasky | This "telephone" has too many shortcomings to be
>                  | seriously considered as a means of communication.
>                  | The device is inherently of no value to us.
>                  |                         -Western Union memo, 1877
>
> -- 
> Tony J. Podrasky | The game of life is a game of boomerangs:
>                  | Our thoughts, deeds, and words return to
>                  | us, sooner or later, with astounding accuracy.
>                  |                                       -Unknown
>
>
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