Unrecognized DEC Power Supply in PDP-11/44 Configuration

[Josh Dersch]

On Thu, Dec 2, 2021 at 6:29 AM pbirkel--- via cctalk <cctalk at classiccmp.org>
wrote:

> Does anyone recognize the (presumably) DEC power supply on the front half
> of
> the rack-bottom in the 11/44 listing at:
>
>
>
> https://www.ebay.com/itm/363640137050
>
>
>
> Blurry photo, but it looks like there are a 4x3, a 3x3, and a 3x5 Molex
> connector, and two brown mini-modules protruding from the right side.
>
>
>
> If so, then what purpose did it likely serve?
>

It's not a DEC power supply, it's a Fujitsu power supply, likely for an
M2284 SMD drive.  Probably went in the empty slot you mention below.

- Josh



>
>
>
> It appears that the 6U immediately below the 11/44 was likely occupied by
> an
> RX02 given the presence of an M8256 in the 11/44 backplane (and skinny
> mounting rails, although I thought those were usually at the bottom of the
> RX02), and that included its own power supply (which wasn't very beefy
> either, nor did it need to be).
>
>
>
> What went into the 6U immediately above the power supply is unclear; there
> is a HEX Wespercorp TC130 Tape Controller as well as three unknown QUAD
> modules in the 11/44 backplane.  Perhaps there was a horizontal autoload
> tape drive mounted there that required a separate power supply?
>
>
>
> Curious!
>
> paul
>
>