[GreenKeys] What is going on here?

[Pete G]

Yes, Jim is correct. Those are Alden model EA, Series "C" machines.
The top unit has a motor and gearbox assembly, which is capable of copying
maps at two different scanning speeds.
Each of the six "modules" below perform a specific function which made
servicing very easy. A nice option was the module extender, which allowed a
module to remain powered when testing.
Most machines were connected to telephone circuits, but could also be used
with a shortwave receiver and a frequency shift converter. Eventually, the
telephone weather circuits switched to digital (DiFax).
I had a unit for many years copying news photos and weather fax. Eventually
the wet paper was no longer available, and attempts to make my own were
less than successful.

Today there are many software programs which will copy the few remaining
weather fax stations, but like the mechanical teletypes, they just isn't
the same as the old machines.

If Nick or anyone else is interested, I have an operation/service manual,
as well as the schematics.

Pete

On Sat, Jul 16, 2022 at 3:49 PM Jim Haynes <jhhaynes at earthlink.net> wrote:

> On Sat, 16 Jul 2022, Sheldon Daitch via GreenKeys wrote:
>
> >
> > This appears to be the same equipment:
> >
> Yes, and I recognize those machines as having been made by Alden.
> Alden packaged his fax gear in those modular units that you see
> in the table.
>
> Alden had a wet paper that turned sepia colored instead of black
> with passage of current through it.  And he made all kinds of questionable
> statements about the sepia being easier to read, or safer to be around,
> etc.  Hogan had the gray or black toned wet paper.  And Western Union
> had their own Teledeltos which was a dry paper but thought to emit
> toxic fumes when being written.
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