On 11/27/22 12:54, Jon Elson via cctalk wrote:
> Anybody need some 1/2" 9-track tape drives?
> I have a Pertec T9640 tape drive (vacuum column, 75 IPS 800/1600 Pertec
> unformatted interface). DEC sold this drive as the TU45. I also have
> an MDB MLSI-TM11 Q-bus tape controller that will run
Hello, thank you for the advice on repairing the failed power supply parts.
I do intend to repair them, my intent was to get one system working, and
then move along to the others. I will admit i am anxious to get a running
rsx system running. I have been working to repair cateract and power
I am looking for advice to get the 11/34 system up and running. I have
started to put together a site to document my progress, to stay on track
with the repair effort. The system has 2 rl02 drives, and an attached 9
track tape drive. I had worked to repair a power supply issue at first,
>
> I think that a good thing is to ramp up the input voltage slowly. Use a
> bench PSU to supply the Vstart voltage and then use a variac with
> insulation transformer to feed the rest if the supply. Use some small
> loads on the 5V and 12V outputs. Now you can safely probe the PSU and
>
I have a box of SCSI stuff that I'm no longer using.
PCI adapters (Adaptec, Symbios)
Cables -- 68-pin, 50-pin Centos, 50-pin Mac-Centos, 50-pin ribbon
cable,
Terminators
Yours in exchange for a PDF of a USPS flat-rate box shipping label.
Everthing might fit in a medium flat-rate box, but
Anybody need some 1/2" 9-track tape drives?
I have a Pertec T9640 tape drive (vacuum column, 75 IPS
800/1600 Pertec unformatted interface). DEC sold this drive
as the TU45. I also have an MDB MLSI-TM11 Q-bus tape
controller that will run this drive on either LSI-11 or uVAX
II systems. DEC
Have you run any (paper tape) diagnostics ? I genuflect to paper tape as XXDP
and TU58 diagnostics are broadly a continuum from the paper tape days. The
seminal 11/40 diagnostics are broadly applicable to all machines (noting that
some addressing modes were implementation dependent ...) and
Hi!
Probably the best way to get an 11 going is to take it by big steps
first, then when that fails switch to one small step at a time and
change as few things as possible between steps.
That said you might want to start by making sure the RL02's come up
first. Open them up, make sure they
There are some pretty good.videos on youtube about the 11/34.and RL02. Ray
Fantini, who lives(d) neat Salisbury, MD.
Bill
On Sun, Nov 27, 2022, 12:48 PM Devin D via cctalk
wrote:
> Greetings,
>
> Been a while since i have posted here. I have several PDP11 systems and
> peripherals. I picked
On 2022/11/27 1:21 a.m., Rob Jarratt via cctalk wrote:
I have done a little more probing around. I have found that the 7812 regulator
that drives Vstart on sheet 1 of Tony Duell’s schematic is shorted, so I will
have to replace this too. I have not found anything else that looks obviously
Greetings,
Been a while since i have posted here. I have several PDP11 systems and
peripherals. I picked the original lot of a system 34 and related tech
in Miami FL a couple years back, and have since found several more pdp
11/34 machines, and a pdp 11/05, 11/85, and others.
It has been a
> On 27 Nov 2022, at 10:21, Rob Jarratt wrote:
>
>
> I have done a little more probing around. I have found that the 7812
> regulator that drives Vstart on sheet 1 of Tony Duell’s schematic is shorted,
> so I will have to replace this too. I have not found anything else that looks
>
I have done a little more probing around. I have found that the 7812 regulator
that drives Vstart on sheet 1 of Tony Duell’s schematic is shorted, so I will
have to replace this too. I have not found anything else that looks obviously
suspicious. I can’t test the output rectifiers for shorts
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