BA11 mounting boxes

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The BA11 is the name for a series of hex system unit backplane mounting boxes for the H960 series of 19"-wide racks produced by DEC. Although they were intended to be rack-mounted, many were available in table-top configuration as well.

The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2", which were further subdividable into a pair of 5-1/4" spaces. The BA11 mounting boxes were designed for these spaces.

They included:

The -F was a 21" box, and the -L a 5-1/4"; the rest were all 10-1/2".

There were also several boxes in the BA11 series which held quad QBUS backplanes: