[GreenKeys] Help to identify an old "SELCAL" circuit board

[Don and Diana Cunningham]

Mr. Haynes is right on the mark again!!  The group of Navy Mars members
called the group "Data Technologies".  They had a nice, one-board ST-6 copy
called the DT-600 that went with your selcal board.  I still have one of the
TU's around here.  They worked VERY well.  I have the book on the DT-600,
but no info on the selcal unit.
73,
Don, WB5HAK
----- Original Message -----
From: "YIR" <yir at scn.org>
To: <GreenKeys at mailman.qth.net>
Sent: Thursday, July 01, 2004 8:17 PM
Subject: [GreenKeys] Help to identify an old "SELCAL" circuit board


> I collect Teletype and related gear.  I have a circuit board with 32
> chips
> on it and after removing a couple of the large chips I discovered
> a couple of Mars calls from 1974.  I suspect this board has to do with
> "selective calling" in conjunction with using a Terminal Unit etc.
> Hopefully someone will remember something about this board and
> tell me what it is supposed to really do.  And of course where to find
> technical data.
>
> Please have a look at these photo links and let me know if you can help.
>
> Thanks,  Pat  K7YIR   ex N0ETG  ex N0MOD  ex N0MTP
>
>  http://mysite.verizon.net/res17bfm/selcal-1.jpg
>  http://mysite.verizon.net/res17bfm/selcal-2.jpg
>  http://mysite.verizon.net/res17bfm/selcal-3.jpg
>  http://mysite.verizon.net/res17bfm/selcal-4.jpg
>  http://mysite.verizon.net/res17bfm/selcal-5.jpg
>  http://mysite.verizon.net/res17bfm/selcal-6.jpg
>
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