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Portable CTA Transmitter Unit65 views
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Portable CTA Transmitter Unit61 views
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Portable CTA Receiver Unit61 views
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Portable CTA Receiver Unit59 views
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Portable Communication System60 views
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Portable Communication System59 views
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Portable Communication System56 views
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Portable Communication System59 views
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UR Interlocking machine, South Portal or 18th St. Interlocking84 views
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UR Interlocking machine with towerman V.C.Lanier, South Portal or 18th St. Interlocking83 views
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Signal location A-48 near South Portal78 views
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Compressors at 13th St. Interlocking68 views
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Compressors at 13th St. Interlocking61 views
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Compressors at 13th St. Interlocking60 views
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Compressors at 13th St. Interlocking59 views
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Power Panel in Compressor Room, 13th St. Interlocking66 views
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Power Panel in Compressor Room, 13th St. Interlocking61 views
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Relay room at 13st. St. Interlocking, showing plug-in relays, RPQ rectifiers, and Ground Detector apparatus66 views
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Rear of Relay Rack in Relay Room, 13th St. Interlocking66 views
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Motorman (Charles R. Blade) operating tripper release at signal location A-18 and B-18, 13th St. Interlocking74 views
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Southbound train at signal location A-18 and B-18, 13th St. Interlocking70 views
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Southbound train at signal location A-18 and B-18, 13th St. Interlocking62 views
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G.E. Transformer, power panel, RPQ-41 rectifiers and relay panel in signal room AB-94 on continuous platform near Jackson65 views
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Relays, transformers, and RPQ-41 rectifiers in signal room AB94 on continuous platform near Jackson63 views
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Looking north from Jackson on Continuous Platform showing singal location A-9368 views
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UR Interlocking machine, North Portal62 views
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UR Interlocking machine with 1st trick towerman, W.K. Wallace, North Portal78 views
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Plug-in relays in relay room, North Portal Interlocking66 views
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Rear of transformer & terminal panel showing North Portal Interlocking59 views
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Transformer & terminal panels, North Portal Interlocking62 views
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RPQ-121 Rectifier, North Portal Interlocking59 views
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Lake-Paulina60 views
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