Well, I went through the hardware I have at home and here is the list.
Most of the stuff hasn't been turned on for over 10 years, probably more
like 15. It has been in my workshop/basement, so it is pretty dry. The
list of manuals will come later. The list of tape drives at work will come
after that, but those (I think) are all 9 track, as are most of these.
Anyway, here is the list of drives/controllers/formatters.
Kennedy 9220 (192-9220-066) two cables, and a Kennedy 5427 mounted on
the back. Formatter maybe.
Cipher F880 1600/3200 BPI, 100/50/25 IPS
IDT (Innovative Data Technology) TD11051, 800/1600 BPI, 45 IPS, 3 connectors,
read, write, motion, 36 pin edge connectors, and a cable from (THIS) drive?
bringing all 3 connectors into a single 50 pin edge higher densidy connector.
Kennedy 9000 (192-9000-019) 9 track 800/1600 BPI, 37.5 IPS
Cipher 910640 800/1600 BPI, 75 IPS
2 Emulex TC01/TU01 board pairs, QBUS
1 Emulex TC02
Pertec F6181-1/0085 Formatter, 2 boards, NRZI Read/Write, PE Read
Datum 10341 Q/HP (Kennedy 120-0025-01) controller
Datum Formatter 5091-120
Pertec f84942(0)/13.9, 901006-01 with R/W 7/9 NRZI
Prime formatter 3101-0001 (Kennedy 9219-509), 3 boards inside
As I said, I have been holding on to this stuff so I could someday set
up a system to read the 15 or 20 tapes I have. All RT-11 or VMS, with a
couple off an RSX-11 system. If there is something here that could help
out with somebodys project, I would be glad to lend it out, or even give
it away, just as long as it either makes it back so I can eventually read
my tapes, or if somebody wants to read the tapes they can have all/any
of the tape drive hardware.
The list of manuals for the formatters/drives will be along shortly.
OK, I'm working in unfamiliar territory... and since there seem to be a lot
of video experts of late, this seems like the time and place to ask...
I'm working on an H-89 that seems to have a problem in the horizontal drive
on the video board. The unit powers up from cold to a good display,
properly sized, and stable. After the unit operates for 10-15 minutes, the
video breaks down, first by jittering slightly for 30-60 seconds, then it
goes to a single vertical line on screen that fades to black. At this time,
the filament on the CRT also stops glowing. If I leave the unit off for
20-30 minutes, it comes back with good video for a bit, then repeats the
above. If I turn the unit back on right away without a cool down, there's
no display/no filament glow.
After tracing the (good) horizontal output signal from the terminal logic
board into various part of the video board, and checking voltages where I
felt I could reach safely in a hot set, I discovered that if I shot
horizontal output transistor Q217 with cold spray I'd get video back right
This unit is the one I posted about on cctalk a few days ago with the NOGDS
board... when I got it, it had a AA battery inside for a clock board that
leaked down onto the flyback transformer. The leak didn't appear excessive,
and most of the "material" on the flyback must have dried long ago and was
brushed away easily, leaving only a slight tarnish on the aluminum heatsink
it's mounted to.
1) Although the flyback _appears_ OK, could the leak have caused some unseen
damage that is now causing excessive current through Q217 and shutting it
down? My limited understanding of flyback construction is that they are
sealed units. It takes several minutes (10-15) before the failure is
observed. Could a flyback failure allow operation for this long? How do I
test this thing?
2) If I proceed under the assumption that the flyback is OK and Q217 is
not... Q217 is a BU500: 1500V, 6A, 75W, SI-NPN. I normally buy from Mouser,
DigiKey, and Jameco, but none of them seems to have this part, and I wasn't
able to turn up anything useful Googling. A possible dealer or two in the
UK, but for a $2-3 part I was hoping for a more-readily-available source or
an equivalent. The closest I can find in the family is BU508A, which is
1500V, 7-8A, 120-125W (depending on whose specs you believe). Is that OK or
too far out of spec? Does anyone know of US source for the real McCoy?
Thanks for any help/advice! --Patrick
Can you tell me a bit more about this virtual tape creation?
I have a few PDP11's working but they all run DSM
It's the only Digital operating system I know - I never used RSX RT11 and
I also have a 9track tapecontroller for pc and a Kennedy 9600 drive on it
but this was used on MSM (the pc version of DSM made by Micronetics)and they
controlled the drive direct without os intervention.
Verzonden: maandag 1 september 2003 21:32
Onderwerp: Re: Digital DSM Disribution tape
The way would be to do one copy of the tape contents in one virtual tape
available to use with one of the PDP11 simulators availables. I use SIMH
and I should like to manage DSM some time :-)
I was able to read a tape this morning, after pulling the drive apart
and making sure every last trace of the old pinch roller was cleaned
>from the shaft. The motor runs HOT (which explains why the old rubber
which was already soft liquified) and any little bit left will
contaminate the cartridge.
It is also souluble in isopropyl alcohol.. So be careful if you try
to clean a tape head with a surviving (unlikely..) roller.
It is a block-addessed device (like DECtape II's).
So that it is saved somewhere, here are the specs:
3M MCD-40 rev 4.0 firmware (Apple Tape 40SC)
4848 blocks 8192 bytes/block (39714816 bytes total)
The drive always retensions when you put in a tape.
It will then do the usual tape head positioning, pause,
then do one last read before extinguishing the red light.
If the light flashes, tape loading failed.
I've put some emails out to people I know who might have
the actual specs/pgmg info, but I'm doubtful that they
I just wanted to take an opportunity to thank Sellam and Walter for the
AS/400. Walter help me load the beast up, along with not one but three
versions of the complete manual set. My back is much better now, if anyone
asks. The system is home, and ticking over nicely. I've spent the balance
of the weekend toying with it. I'd especially like to thank the guys for
the opportunity at an IBM 5364. Walter had this sitting in the back of his
basement and mentioned it while packing up manuals. I've had my eye out for
such a critter for about two years. I haven't got a PC set up as a
controller yet, but I'm very keen to take a crack at it. As always, I can
offer myself as at least a physical resource for the S/36 gear, and now a
bit of the OS/400. Anyone interested in a surplus set of manuals (and
possessed of a strong back) reply quick. The surplus will be dutifully
recycled. That should give you DEC geeks a warm and fuzzy since most of it
will be reincarnated as toilet paper, I'm sure.
---------- Forwarded message ----------
Date: Mon, 11 Aug 2003 12:06:33 -0400
From: W. E. Perry <wperry(a)fiduciary.com>
Subject: AS/400 1991 9404
I have a 1991 vintage AS/400 9404, located in New Jersey, with original
QIC120 distribution of system software through 1993 OS/400 v3 and *ALL*
manuals. In storage since 1995, but working then. Would you want this
machine or could you point me to someone who might?
I'm trying to build a data separator for a floppy disc controller board.
The board uses a NEC 765 (aka uPD765) controller. I've found a schematic for
a ZX Spectrum +2A FDC at http://simandl.jinak.cz/stranky/zxs/zxs_a.htm - this
seems OK, except it uses a 74S188 fuse PROM as part of the data separator
state machine. Does anyone have any spare 74S188s in their junkbox that they
could be persuaded to part with?
I'm also interested in the format the data separator supports - I can't
tell from the state data if the state machine runs in FM or MFM mode. If it's
FM, does anyone have a schematic for an MFM data separator that uses fairly
standard (i.e. 74LS, 40xx, etc) ICs?
Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB,
philpem(a)dsl.pipex.com | ViewFinder, Ethernet (Acorn AEH62),
http://www.philpem.dsl.pipex.com/ | 8xCD, framegrabber, Teletext
"High voltage. Yeah, right. I can hold this 20kV wire with my fingers... YEAARGH!" *thud*
I think I've come up with something that will work.
The outer and inner cross section of the roller is .7" and
.5" so I dug around at Weird Stuff to see if any old DC2000
drives were close. The Colorado 250 appears to be, and with
a bit of work with a small flat blade screwdriver I was able
to remove the rubber from the .5" shaft. Now, I need to clean
the goo out of one of the MCD-40 mechanisms and try it.
This may be a workaround for the HP's as well. If someone has
a caliper handy, I'm curious what the cross sections are for
the roller in that.