29 Jun
2001
29 Jun
'01
10:22 a.m.
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(a)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.
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_| _| _| Brian Knittel / Quarterbyte Systems, Inc.
_| _| _| Tel: 1-510-559-7930 Fax: 1-510-525-6889
_| _| _| Email: brian(a)quarterbyte.com
_| _| _| http://www.quarterbyte.com