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Cray YMP-EL start up after VCFe 2018

Last year we mainly took care of the CDC 960. It’s time to continue with the small Cray.

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Cray YMP-EL fault LEDs
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Power for the Cray
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Power connection to cab two
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IPI wiring cab2 to cab1
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IO System connectors interchange
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Load IOS
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Unicos up and running

The Cray is running, I am very happy that there was no bigger problem. Now we can take care of the UNICOS and the network.

IBM 360-65 and 360-44 Operator Consoles

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IBM 360 consoles, 360-65 & 360-44

We got two IBM consoles.
From the IBM 360-65 and the 360-44, the special thing about the 44 is that it is labeled in German.

Thanks Wolfgang Kainz- Huber for the quick reaction and the organization.

In the future we will probably build a 360 emulation with a RaspberryPI to make the consoles “blink”.

Vintage Computer Festival Europe 20.0

Yes, it’s VCFe again! This time we are not represented with an exhibition. But there will be a lecture on Cray-Cyber on Saturday. Generally Saturday, Wolfgang Stief continues his lecture series on Cray with the Cray 3, unconditional recommendation.

Program VCFe 20.0: http://www.vcfe.org/D/VCF.html
Lecture Cray-Cyber: http://www.vcfe.org/D/Vortraege.html#11
Lecture Cray 3: http://www.vcfe.org/D/Vortraege.html#2
VCFe 20.0 http://www.vcfe.org/D

Paul Allen

Paul Allen died very suddenly seven days ago.

That was very close to me, although I never met Him personally. I followed his projects like the “living computers museum + labs” with interest and respect.
Our member Gerard van der Grinten was personally on site in Seattle to help with the start-up and repair of the CDC 6500.

The world has lost a great man, he has moved so much.
My condolences to Paul Allen’s family and friends.

https://livingcomputers.org/

Cyber 960 first run without any errors

All variable transformers had to be cleaned, now the power supply is stable again. We tested the currents through the transformers and diodes with the clamp ammeter.

A short video @youtube about the Cyber 960, you can hear the 400Hz and the fans.

Disassembled fan, bearings

Fan housing with field coils

Fan repair at the console CC545, we disassembled the engine and greased the bearings. Now we know that a second fan is installed, because the first one is now quiet.

CDC Cyber 960 starts after 8 years

The installation of the cables is completed, now we start troubleshooting.

interconnection cable CDC Cyber 960

Many thanks to Jerry, he sent us a new IOU to CPU cable.

Console CC545 disassembled

Our Cyber CC545 console urgently needed thorough cleaning. The picture tube works at 17500V so we don’t take any risks. The housing has also been repaired.

Variac 400Hz

Variac disassembled

The IOU transformer had contact problems, we disassembled it and cleaned all contacts and surfaces.

CC545 dead start Cyber 960

CC545 edit dead start routine

The CDC Cyber 960 is alive, we can access the IOU, but the dead start fails.

Stay tuned!

Working on the CDC960 and reading the backup tape for the CRAY Y-MP EL

A lot has happened in the last few weeks:

  • For the operation of the CDC 960 almost all devices are installed in our computer room.
  • The power distributor is rebuilt and equipped with new fuses, as well as the 400Hz cable from the generator and the 50Hz supply line within our room is laid and connected.
  • The 400Hz generator has been successfully tested.
  • Also from the Cray Y-MP EL there is something pleasing to report, we could read the urgently needed SCAN files from a defective original tape.

Here are some impressions:

CDC405, CDC960

QIC Tape Tension Band Replacement