decserver 550 in Kansas City

From: Jonathan Engdahl <>
Date: Fri Feb 28 00:04:00 2003

Actually, instead of hacking up the boards, you ought to grab the whole
rack. Do the CPU mods, shove in an RQDX3, figure out how to mount and power
a hard drive, and you're in business.

On my 11/53 that's still in a DECserver chassis, I soldered the disk power
leads to the dummy load board, and the drive rests on the unused card guides
on the left half of the rack. I drilled out the rivets and removed all the
useless superstructure.(unless you have the rack that has a drive bay up

Oh yes, for the RQDX3, you'll either need a distribution board (M9058 or the
thing on the back of a BA23 backplane) or see for how to build a cable.

For the console you'll need MMJ cables and adapters which can be bought from Beware, the 9-pin MMJ adapter they sell is probably VAX
compatible, not for the PC COM1: port. I bought the kit version and wired it
up myself. The VT420 is the best terminal to look for. The 11/53 can do up
to 38400 baud.

Did you see the "DECserver" on eBay that is actually a microVAX III

Jonathan Engdahl
"The things which are seen are temporary,
 but the things which are not seen are eternal."  II Cor. 4:18
----- Original Message -----
From: "McFadden, Mike" <>
To: <>
Sent: Thursday, February 27, 2003 10:35 AM
Subject: decserver 550 in Kansas City
> Wandering through the local surplus I found a decserver 550 in a full
> rack.
> It had the following boards in it.
> 4 X CXA16-M   M3118
> 1 X DESQA-SA  M3127
> 1 X KDJ11-SD  M7554
> Bulkheads, power supply, and cables
> I read somewhere that it could be converted to a 11/53 with a minimal
> effort.  How much trouble?
> Mike
> m m c f a d d e n _at_ c m h . e d u
Received on Fri Feb 28 2003 - 00:04:00 GMT

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