DD11 backplanes

The DD11 backplanes are a series of UNIBUS and MUD backplane system units. They were normally installed in a BA11 mounting box.

• DD11-A backplane - 4 slot
• DD11-B backplane - 4 slot, with early DEC power distribution connectors
• DD11-C backplane - 4-slot MUD, with later power distribution connectors
• DD11-D backplane - 9-slot MUD
• DD11-P backplane - modified DD11-D used to hold the PDP-11/34 CPU

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