6 Apr
2005
6 Apr
'05
4:50 a.m.
Hi Brad,
the connection from the controller board (UNIBUS or QBUS) is a straight
cable AFAIK. The RX01 and RX02 exist as a table top box and uses a DB25
connector to the controller.
If you want to make a complete RX01 drive, the first thing to check is
the *bottom*. Since many parts have been removed for perhaps completing
other drives, check if the drive belt is still there on each drive!
The RX01/RX02 drives have *two* boards mounted on top of the disk drives
and they cover bothe drives, so they are not smallish.
Tony gave (as usual) a good description.
I was surprised to read that the two boards are somehow matched. That is
a pity because I have two *sets*, and since one board has a rather high
connector (relative to the other components on that board, and the other
board is a bit smaller, I have put those two boards together. So there
is a chance that they are kept as a set togethre but I am not 100% sure.
I have also a complete power supply, but it is wired for Europe, that is,
it is set for 230/240 VAC 50 Hz. I don't know if there are taps on the
transformer to make it work at 110 V. Neither if it can cope with 60 Hz.
And I have also the fan and air plenum that is mounted on the back of
the drives ...
Sounds like you have rather a lot to find.
-tony
Well, it looks that I have all what you need. I stripped an RX01 just a
few weeks ago, and the only parts that I threw away is the metal front
(heavily scratched) and the metal frame on which all is mounted).
Small problem though, the power supply is heavy ...
and I live in The Netherlands ! BTW, I do not have spare belts :~)
- Henk, PA8PDP.
6 Apr
6 Apr
9:40 a.m.
On Wednesday 06 April 2005 03:50, Gooijen H wrote:
Hi Brad,
the connection from the controller board (UNIBUS or QBUS) is a
straight cable AFAIK. The RX01 and RX02 exist as a table top box and
uses a DB25 connector to the controller.
Not all RX01's have a DB25 to connect to the controller, on the ones I
recovered with an 11/23 system (rackmount drives), there's just a
ribbon cable connecting the two berg connectors on the controller and
drive together.
Pat
--
Purdue University ITAP/RCS --- http://www.itap.purdue.edu/rcs/
The Computer Refuge --- http://computer-refuge.org
9:49 a.m.
the connection
from the controller board (UNIBUS or QBUS) is a
straight cable AFAIK. The RX01 and RX02 exist as a table top box and
uses a DB25 connector to the controller.
Not all RX01's have a DB25 to connect to the controller, on the ones I
recovered with an 11/23 system (rackmount drives), there's just a
ribbon cable connecting the two berg connectors on the controller and
drive together.
Pat 
12:44 p.m.
On Apr 6, 2005 9:49 AM, Ashley Carder <wacarder at usit.net> wrote:
> > the connection from the controller board
(UNIBUS or QBUS) is a
> > straight cable AFAIK. The RX01 and RX02 exist as a table top box and
> > uses a DB25 connector to the controller.
I believe that the DB25 is only used on the tabletop
version, which has
the usual rack-mount RX01/RX02 mounted inside a nice tabletop box.
Inside the box the ribbon cable coming from the RX01/RX02 boards
connects to an adapter that converts it to a DB25 connector.
Yes. The rack-mounted drives take a 40-pin cable back to the
controller (RX11, RX21, RXV11, RXV21, RX8E)
The other place one sees DB25 drive interfaces is with DECmates.
AFAIK, the same board that's inside the tabletop enclosure is what's
under the wood-grain laminate pedestal top, serving the same
purpose... adapting the external DB25 to the internal 40-pin Berg
connector.
DECmate Is and MINC-11s both come ready to attach to DB25 drives (the
MINC has a DB25-Berg cable that goes right in to the RXV21, and the
DECmate I has a DC37 drive connector on the edge of the CPU board that
connects to either one or two DB25s depending on which cable one has).
In all cases, though, the drives themselves have a 40-pin Berg
connector on the uppermost board of their two board set. With the
exception of the DECmate I (and possibly DECmate II as I have never
seen its 8" drive interface), all DEC controllers have a 40-pin Berg
at the controller end. It's just that there may be a transition cable
between the controller and the outside world.
-ethan
7:57 p.m.
I was surprised to read that the two boards are
somehow matched. That is
a pity because I have two *sets*, and since one board has a rather high
connector (relative to the other components on that board, and the other
board is a bit smaller, I have put those two boards together. So there
is a chance that they are kept as a set togethre but I am not 100% sure.
They're not matched in the sense that a particular controller board is
set to work with a particular read/write board. Any (say) RX01 controller
with work with any RX01 read/write board.
What you can't do is mix a controller from an RX01 with a read/write
board from an RX02 or vice versa. You'd realise this if you tried to do
it, the RX01 uses a cable with 16 pin DIP headers to link the boards, the
RX02 uses a cable with 20 pin BERG connectors.
[Controller == the top board, hinged ot the chassis, read/write == the
lower board that the drives plug into]
I have also a complete power supply, but it is wired for Europe, that is,
it is set for 230/240 VAC 50 Hz. I don't know if there are taps on the
transformer to make it work at 110 V. Neither if it can cope with 60 Hz.
There is some kind of voltage selection done by the cable that links the
15 pin AMP socket on the back of the PSU to the drive motors and fan. I
can't rememebr if you can strap a 230V PSU for 115V though.
What I can rememebr is that this darn thing uses a ferroresonant
transformer, and that the conversion between 50Hz and 60Hz is
non-trivial. I seem to remember it involves a transformer swap.
Of course once you've got the PSU sorted out, you then need to replace
the drive motor pulleys if you're going between 50Hz and 60Hz...
-tony
7075
days inactive
7075
days old
4 comments
5 participants
participants (5)
-
ard＠p850ug1.demon.co.uk -
ethan.dicks＠gmail.com -
GOOI＠oce.nl -
pat＠computer-refuge.org -
wacarder＠usit.net