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List:       classiccmp
Subject:    Re: Fwd: Desk-fax interest ?
From:       ard () p850ug1 ! demon ! co ! uk (Tony Duell)
Date:       2011-11-25 21:40:27
Message-ID: m1RU3VW-000J4BC () p850ug1
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>
> Just forwarding this to the list in case there might be some interest  
> here.
>
> These are old 1950s-era fax machines, not 1990s. Apparently they are  
> similar to the ones I present here (which is why he contacted me):
>     http://www.cs.ubc.ca/~hilpert/e/deskfax/index.html
>
> They are located in Northern Ireland.

Drat! Had they been closer (as in I could have collected them), I would
have been somewhat interested.

There's a Rank Xerox RX400 Telecopier going on my bench soon. This is a
1970's vintage analogue fax machine. Alas mine is missing a few parts,
including the telepgone line coupling unit, but I have the service
manual. This is mostly a boardswpper guide, but better than most with an
explanation of how the boards interconenct, what the signals are, tetc.
It also includes a simplified scheamtic of the (misisng) line coupler.

The machine is an interesing mix of discrete transsitors, op-amps (709s
in 14 pin DIL packages) and a custom MOS IC (which seems to be the
control logic, drum motor PLL, etc).

-tony

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