02041974

311 photos tagged 02041974, from 1 member of Flickr Commons.

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The last upload was November 2025.

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26_0026505 Rohr Collection Image

from SDASM Archives

  • Chuck Walla said:
    Looks like a headset jack under the console writing surface.

26_0026405 Rohr Collection Image

from SDASM Archives

  • Chuck Walla said:
    In any center with a similar function, the persons whose desks are closest to the screens are responsible for a subset of the system, (on the display in front of them). The person in the back (right of frame) is the shift supervisor.

    I am told the original 1970s BART communications backbone was a single-sideband, frequency-division multiplex analog coaxial cable system akin to Bell System L-Carrier. If true, the SCADA and block signals all ran over the coaxial cable.

    These images are sub-snapshot level quality.

26_0026430 Rohr Collection Image

from SDASM Archives

  • Chuck Walla said:
    Guess: is that Rohr's Arriflex 16mm movie camera?

    Me: "The BART employee appears to be reading a printout inside the acoustic cabinet and taking notes with a pen. That's how it was done in 1974."
    My friend: "That, and five dollars, will buy you an espresso drink at Starbucks."