slottedcable

2 photos tagged slottedcable, from 1 member of Flickr Commons.

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The last upload was July 2025.

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Chuck Walla said:
Original BART system used a General Electric VHF Railroad Radio Service system R160.410 110.9 T161.505 110.9. Slotted Heliax coaxial cable "Radiax" was strung along all underground sections. It leaked signal that allowed communication with trains underground. You can see the Radiax and hangers as a line along the track and above the riders' heads.

2019 photo: