does someone has a PDP11 with an Emulex UC?7 oder UC08 (double Version)
running with disks greater than 2GB?
I have some obscure effects when I try to use IBM DCAS-34330 Disks.
Even a DEC RZ26L has the same problems (Format and Verify ok, but no access
>from the OS side..)
Regards,
Holm
--
Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe,
Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583
www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741
A couple of months ago I picked up a Terak, in pieces. I'm now working
on putting it back together as well as I can; the power supply has three
large capacitors that are visibly leaky (i.e. there's crud coming out
the ends) so I would like to replace them before I go any further.
Thing is, I've never run into a capacitor quite like this -- it's a
radial capacitor, about 1" in diameter, and about 4" long, but there are
pairs of terminals on both ends (i.e. a "+" and "-" terminal on both ends).
It's marked as follows:
MALLORY
1300 MF 75V 105C
QLA132U075N3L
235-7838
I considered that this might actually contain two capacitors in one can
(as I've seen in some old radios & TVs I've worked on), but the markings
on the can don't seem to indicate that this is the case, and further it
looks like (based on probing with my DVM) the power supply board is
wired such that the "+" on one side is the same circuit as the "+" on
the other. (I don't have a schematic to confirm this, and I haven't yet
pulled the whole power supply PCB out to validate this.) Additionally,
after removing the capacitor from the circuit, there's continuity (w/ no
apparent resistance) between the "+" terminals on either end of the
capacitor. So it -looks- like this is just a single 1300uF capacitor,
but I'm curious as to why there are terminals at both ends...
Any thoughts?
Thanks as always,
Josh
On Sat, 2 Jun 2012, William Donzelli wrote:
> Please realize that when you are dealing with Apple 1 "level"
> artifacts, the fakes have to be *perfect*. Perfect enough to undergo
> scrutiny under a series of lab grade tests and expert eyeballs.
>
I would think the hardest part would be finding the properly aged, unused board material itself. Boards from 1976 have definite technological characteristics, along with the patina of aging, compared to a board cut today.
- John Singleton
Hi Guys,
Here's a partial list of the stuff I'm looking to sell.. I don't have
any prices yet, so make me an offer.
I will ship the following:
HP 32SII calculator
HP 49G+ calculator
Central point software Copy II PC deluxe board
4-6 tubes of 27C2048 16 bit wide EPROMS date code 97.
Collection of 16032 / 32016 chipsets, Most are engineering samples
Stuff you must pick up in Goldendale Wa, . 100 Mi east from Portland Or.
in the Columbia gorge ( wild flowers are in bloom now )
Tektronix - Most stored in unheated shed, unknown condition, but not
trashed
4025, 4027, 4023 color and mono terminals
Tek 8002 Development system w/ calcomp floppy drives and 100-150 OS
disks (floppies stored in controlled environment)
Tek 6250 32016/32032 systems - Lots of parts, 2 chassis, 2 power
supplies, 20-30 boards including frame buffer and graphics engine (gold
scrap?)
Tons of other stuff - Metheus Omega 400 graphics controller, analog
devices process control computers, thermocouple stuff, old terminal
boards ...
Stored in controlled environment
Tek 4052 with 4662 plotter and ( screen printer - stored in shed) HV
supply dead, logic / CPU and LV supply was OK last I checked.
A pile of Mac+, SE and road-apple macs, SCSI hard and CD drives ( low
capacity )
Apple 2 GS woz with 2 drives, mem expansion, color monitor, joystick
Computer Automation Naked mini chassis, front panel, power supply, CPU /
64 K words memory, TTY interface, extension card and semiconductor test
system interface
Email for details. I'll post some pics later ( dialup sucks )
If you come up, you will be taking something home, sale or not.
Thanks,
Jim Davis.
I've suddenly found myself desperately in need of the following manual. It used to be available at Wilber Williams' Computer Museum web site, but of course that site has shut down and I don't know of any mirrors :(
It was located here:
http://www.computer.museum.uq.edu.au/pdf/DEC-11-H740A-A-D%20H740D%20Power%2…
DEC-11-H740A-A-D H740D Power Supply Maintenance Manual
Thanks for any help!
-Seth
I was able to get a pretty good measurement on this belt (thanks for the
tips) and found one that I believe to be compatible at MCM for under $1.
If anyone is interested, the part is...
SQUARE BELT 10.5X.046/266.70MMX84.89X1.17 Square Belts, I.C.: 10.5,
Thickness: 0.046
I used the string method that was suggest and got a length of 27cm and a
digital caliper to measure the width and it was 1.15mm. So I think the
above should work.
Thanks.
Win
OK, I made an inventory of all the boards. Some of these go with
the BA23 cabinet, but I could mix and match for whoever buys
the box. It has a TK50 and RD54-A disk drive in it.
The board list I have is :
M7169 QDSS
M7620 BA KA650
M7621AF memory
M7621AV memory
M7168 memory - have 2 boards
M3106 quad serial mux
M7555 RQDX3
M8049 DRV11-J with 1 cable
M7555 Disk control (MFM??)
M7546 TK50 controller
M7516YM DELQA - I have a total of 2 of these, listed the
other last night
M8634 IEQ11 - GPIB interface
Of the above modules, the external connector panels are incredibly corroded,
but the boards actually are quite clean.
2 x function selector panel module for KA630/KA650 battery, serial port
baud rate selector, etc.
M7606EF KA630 CPU
M7607 MS630A
M8029 RX02 controller
M7264 LSI-11
M7950 DRV11-B
M7942 no memory chips in sockets
Also, dec-related parts :
Emulex QD211
Dilog DQ686
Dilog DQ696-15 (have 2 units)
Andromeda DC11 (floppy + MFM disk interface for Qbus)
Emulex CS04
M?? Qbus memory MO XI/PL LSI-11
M ?? Qbus memory MSC4601
?? BTA1000 Q-bus terminator
MDB MLSI-DLV-11
Heath H11-2 parallel I/O
I am located in St. Louis, MO
Jon
Well, digging through a bunch of stuff, i have found some items people
might have interest in. I have :
A KA-11 backplane section, 3 pieces of 4 x 6 Unibus-style backplane.
I'm pretty sure the label reads KA-11, which I think it the backplane for
an 11/20 CPU. There is one wire-wrap wire that got scraped when a screw
was removed, otherwise no damage to it. the connector contacts
look clean, too. Free for the shipping cost.
I have a complete KA-650 with cabinet. It is pretty dirty. But, years
ago, I did plug the CPU and memory into my KA-650 system, and
it loaded VMS. I was using 4.7 at the time, and upgrading to the
KA-650 would have required upgrading and cracking the
security on VMS 5.1 Not sure what to ask for this system,
but I could list the board numbers if somebody wants it.
No hard drive, but there is a TK-50 in the cabinet. I got quite a
stack of boards with it, but other than CPU and memory, I did not
test them. Some of them probably have serious corrosion damage.
It must have come out of a chemical plant or something, it was like that
when I got it.
I have a KA-630 maintenance print set. Free for the shipping.
I have a Lear Siegler ADM-36 maintenance manual, with schematics.
I used that print set to double the CPU speed on the ADM-36 that
I had. (Got rid of the terminal a long time ago.)
Got a VT-240, worked last time I powered it up. Also 2 LK-201AA
keyboards. Make an offer.
Got several 9-slot Q-bus backplanes with fan and switching power
supply. These were from the WELL (Whole Earth Lectronic Link)
service. Not sure of the backplane part number, it is covered
by the cabinet. Make offer.
Aviv Q-bus Storage Tek tape interface. All the firmware is marked
R925, so that might be the model #. Make offer.
2 Q-bus printer interface, M8027. Make offer.
Unibus paddle, M9042. Make offer.
MDB Q-bus (or is it Unibus?) MDB-LP11 (name kind of suggests
Unibus, but it is 4-wide. Looks like it handles 2 printers. Make
offer.
2 quad-wide extender boards. 2 dual-wide extender. Make offer.
1 M9202 Unibus jumper module, with the folded-up cable between
the boards. Make offer.
4 M9047 Qbus grant continuity card.
1 G7273 Unibus grant continuity card.
1 M9302 Unibus terminator.
1 Camintonn CM-DRV11-WA Qbus DMA parallel interface.
1 DEC M7941, I think this is a DEC DRV-11, without the DMA.
1 M9400-YE, M9401 set with interconnecting cable, Qbus cabinet-cabinet
extension.
1 Dilog DQ153 Q-bus mag tape control for buffered pertec interface.
1 DELQA Qbus ethernet interface, with cable and MAU connector.
1 CMD CQD-200/T Qbus SCSI tape control. Don't remember if this
one works or not.
1 TD Systems Viking Q/B, Qbus SCSI disk controller, I think.
1 M7546 TK-50 Qbus controller.
I still have more stuff, like the boards that came with the KA-650, I
will have to clean them up and inventory them.
Jon
