> "BA" in a DEC part number usually implies some sort of box.  Usually,
> it's a box with a bus backplane.  The BA213 is a Q-bus backplane, also
> commonly referred to as a "skunk box" (modules intended for use in a
> BA213 often have a S suffix).  Your PDP-11/03 is probably in a BA11-N
> or a BA11-S Q-bus backplane.

Yes, you are absolutely correct.. Sorry for that..

The (original) DEC manual was a bit unclear on the matter and
designated the entire box as BA213

> DEC racks usually begin with a "H" (doesn't narrow things down much -
> a huge number of non-rack products also have "H" part numbers, such as
> power supplies.  Of course, the power supplies were originally bolted
> to the rack and independent of the backplane...)

Yup.. 

H9644 for the rack

> > The RA82 sucks 4A of that, so the QBUS chassis is rated at 1.9A
> > (no labels on the QBUS part..)
> 
> This doesn't sound like a BA213 power rating at all.  My BA213 has
> stickers on the front and sides saying "BA213, 100-120V,
> 10.2A".  Divide that by two for your power supply voltage and that's
> still substantially more than 1.9A.

Hmm.. I examined the (broken) BA213 I have here as well and you're right.. 
This ne does have a label and it mentions 4.7A at 230V

Strange.. Whay did DEC put a label on the H9644 with 230V 5.9A when it
includes the RA82 which (according to it's label) is rated for 
220-240V 4A and the BA213 at 4.7A? Weird..

> And a RA82 sucks much more than 4A on spin-up!

Definitely...

								Bye Arno.
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