UNIBUS extension card/cable sets Was: Looking fo

John Wilson wilson at dbit.com
Mon Jun 22 11:23:38 CDT 2015

On Mon, Jun 22, 2015 at 11:46:08AM -0400, Noel Chiappa wrote:
>    > I've seen M9014s only at the far end of the UBAs on a KS10, so it
>    > wasn't taking the place of a BC11.
>??? If it wasn't take the place of a BC11 (i.e. proving a path for the UNIBUS
>out), what was it doing?

OK then I guess it *was* taking the place of a BC11. :-)  I just meant it
wasn't jumping directly from one DD11 to another, so the "source" end
really was three Bergs, not a DD11 slot.  I've seen that done only with the
fancy flexprint cable, not two paddles and three ribbon cables, so I was
kind of assuming that there's some impedance-matching (etc.) problem with
using ribbon cables for more than one hop.  But then again ...  I chose the
digital version of EE as my major precisely because I knew I'd flunk Fields
and Waves.  Transmission lines are black magic as far as I'm concerned!

John Wilson
D Bit

More information about the cctech mailing list