On a lighter note and I hope I don't jinx anything.
I think its a bit of a marvel that I am witness to a Speedtronic MK1 panel still operating a gas turbine since 1978. It was probably powered up earlier so could be around 47 years old or more. Probably will be decommissioned in a few years so a bit sad to think it will just end up on a scrap heap after such good service.
Be interesting to know if there is anything comparable or older running a gas turbine to this day. Location and serial number withheld.

 

Probably through-hole single layer PC boards, DIP chips, maybe some socketed PROMs? All linear DC power supplies?

Does it have ribbon cables (which I despise)?

 

That's actually been "modified" with some things that didn't come standard with the Mark* I. But there are LOADS of printed circuit cards for Mark* I still around and GE did release the schematics for the printed circuit boards and they were single-layer making them easily repairable. I don't recall seeing any DIP switches, but there were a LOT of pots. The printed circuit cards slid into slots and were interconnected with Termi-point/Wire-Wrap wires. It made making logic changes fun, to say the least. Troubleshooting was difficult at best; a multi-channel chart recorder was required and sometimes multiple voltmeters (back when DMMs were just coming out and they were very expensive). It was a fairly robust control system for its time, and there are many still in use around the world--though they generally get replaced when the tech's keeping them running retire. Minimal redundancy though. And the power supply system could be a real pain to troubleshoot and repair, though I would have to imagine all the original power supplies have long since been replaced in an panels still in service today. (That would have been my first "upgrade"/replacement!) Good schematics for the system, but sometimes a little hard to "follow" a signal through multiple pages/rungs (yes, it used relay ladder logic). Not difficult for some of us, even easy, actually. GE had a good habit of naming conventions and drawing standards. (Sometimes!)

They took a licking and kept ticking!

 

While there may be other comparable or older systems running gas turbines, it’s increasingly rare. In general, equipment of this vintage often finds its way into museums, technical archives, or private collections after decommissioning, as they serve as historical artifacts of industrial progress.

 

On a lighter note and I hope I don't jinx anything.
I think its a bit of a marvel that I am witness to a Speedtronic MK1 panel still operating a gas turbine since 1978. It was probably powered up earlier so could be around 47 years old or more. Probably will be decommissioned in a few years so a bit sad to think it will just end up on a scrap heap after such good service.
Be interesting to know if there is anything comparable or older running a gas turbine to this day. Location and serial number withheld.

Nice, looks like a Alstom package, Frame 5?

We had 3 of the same units, one remains operating Mark ii.