Things FS (dec, ncd, sun, chips), and Info requested

From: Eric Smith <>
Date: Wed Feb 5 20:49:00 2003

Pat writes about the DEC SC008 Star Coupler for CI:
> So would it be worthwhile for me to pop the cover on one of these and
> generate a schematic to post on my website? Or are there not any
> compents inside?

The contents consist of a small number of large custom-wound
transformers, if what I've heard is correct.

I sort of imagine that the base eight-port version would have
a transformer with nine windings, one for each port and one to
attach the optional in-cabinet expansion to sixteen ports.

But I haven't actually torn one apart, so I could be completely

CI was normally run with two redundant paths. I'm not sure if
an eight-port SC008 has two separate transformers to support that,
or if you just had to use two SC008s. It would be desirable to
run the redundant paths through physically separate Star Couplers,
which suggests that each would only have one transformer (two for
a 16-port).
Received on Wed Feb 05 2003 - 20:49:00 GMT

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