qbus prototyping

From: Jonathan Engdahl <engdahl_at_cle.ab.com>
Date: Fri Jun 29 14:22:56 2001

Douglas Electronics appears to be still in business, and some
Qbus proto boards are listed on their web page:

http://www.douglas.com/hardware/pcbs/breadboards/digital.html
http://209.35.53.132/hardware/pcbs/breadboards/digital.html


I emailed Vector a month or two ago, and the person who answered
me could find neither boards or knowledge of them:

"Sorry, Jonathan, this is not something we make at present. We
moved about 4 years ago and trashed a lot of the old dwgs. etc.
It doesn't look familiar."

--
Jonathan Engdahl             Rockwell Automation
Principal Research Engineer  24800 Tungsten Road
Advanced Technology          Euclid, OH 44117  USA
Euclid Labs                  http://users.safeaccess.com/engdahl
----- Original Message -----
From: "Michael Davidson" <michael_davidson_at_pacbell.net>
To: <brian>
Cc: "Jonathan Engdahl" <engdahl>
Sent: Friday, June 29, 2001 2:48 PM
Subject: Re: qbus prototyping
> OK - actually I believe Jonathan already asked that question
> earlier I just hadn't got around to replying to it and I
didn't
> notice that my reply went just to you and not to the entire
list.
>
> Anyway, as you can see I have more stuff here than I could
ever
> use and I would be perfectly happy to part with one or two of
> them if someone has a good use for them.
>
> Michael
>
> Brian Knittel wrote:
> >
> > Thanks for the detailed info, Michael. I'll forward
> > it to Jonathan Engdahl -- maybe these part numbers
> > will help him find a source for the things.  Apparently
> > most supply houses no longer even remember what qbus
> > is.
> >
> > brian
> >
> > > > Brian Knittel wrote:
> > > >
> > > > Hi Michael,
> > > > What sort of prototyping board are you planning on
using? Someone
> > > > was asking about the availability of prototype boards
just a couple
> > > > of weeks ago and no one responded.
> > >
> > > I have several Qbus prototype boards which I acquired last
year as
> > > part of an auction on eBay. I'm not sure yet which one I
will use
> > > for this particular project, but here's what I have ...
> > >
> > > 2 x DEC W943
> > > 1 x MDB MLSI-WWB1
> > > 2 x Douglas Electronics 9-DE-11
> > > 2 x Douglas Electronics 12-DE-11
> > > 1 x Douglas Electronics 9-DE-8
> > > 2 x Vector 4607
> > >
> > > The DEC W943 is a dual height module originally populated
with 25 x 16
> > > pin DIL sockets, complete with wire-wrap pins on the
component side of
> > > the board, power tracks and decoupling capacitors. On each
of these
> > > boards 2 of the DIL sockets have been removed to make way
for a 40 pin
> > > connector.
> > >
> > > The MDB MLSI-WWB1 is a dual height module laid out with
power tracks,
> > > solder pads and component side wire-wrap pins but no
sockets. It could
> > > accomodate 30 x 16 pin DIL sockets and up to 6" worth of
up to .6"
> > > pitch DIL sockets.
> > >
> > > The Douglas 9-DE-11 is a dual height card populated with
18 x 16 pin
> > > DIL sockets and 2 x 40 way connectors. The board has power
tracks and
> > > decoupling capacitors already fitted. All connections to
the sockets
> > > and connectors are brought out to wirewrap pins on the
component side
> > > of the board. There is also an unpopulated area of the
board where
> > > you could mount up to 5.8" worth of up to .6" pitch DIL
sockets.
> > >
> > > The Douglas 12-DE-11 is a dual height card populated with
18 x 16 pin
> > > DIL sockets, and with two unpopulated areas each capable
of holding
> > > up to 5.8" worth of up to .6" pitch sockets.
> > >
> > > The Douglas 9-DE-8 is a quad height card laid out with
power tracks
> > > and solder pads for 60 x 16 pin DIL sockets, and an area
where you
> > > could mount up to 9.6" worth of up to .6" pitch DIL
sockets. At the
> > > top of the card there are solder pads for 4 x 40 way
connectors.
> > > This is a bare card with nothing mounted on it.
> > >
> > > The Vector 4607 is a dual height card, drilled on .1"
pitch with solder
> > > pads for connecting to the edge connector and nothing
else.
> > >
> > >
> > > A few of these cards had been used for (apparently
unfinished) prototyping
> > > efforts - they are all in good condition and should be
reuseable without
> > > any problems - the Douglas quad height card and the MDB
dual height card
> > > have obviously never been used and are in excellent
condition.
> >
> > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> > _| _| _|  Brian Knittel / Quarterbyte Systems, Inc.
> > _| _| _|  Tel:   1-510-559-7930   Fax: 1-510-525-6889
> > _| _| _|  Email: brian_at_quarterbyte.com
> > _| _| _|  http://www.quarterbyte.com
>

Received on Fri Jun 29 2001 - 14:22:56 BST