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Portable CTA Transmitter Unit88 views
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Portable CTA Transmitter Unit81 views
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Portable CTA Receiver Unit81 views
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Portable CTA Receiver Unit80 views
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Portable Communication System85 views
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Portable Communication System79 views
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Portable Communication System76 views
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Portable Communication System81 views
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UR Interlocking machine, South Portal or 18th St. Interlocking142 views
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UR Interlocking machine with towerman V.C.Lanier, South Portal or 18th St. Interlocking109 views
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Signal location A-48 near South Portal104 views
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Compressors at 13th St. Interlocking95 views
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Compressors at 13th St. Interlocking89 views
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Compressors at 13th St. Interlocking83 views
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Compressors at 13th St. Interlocking78 views
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Power Panel in Compressor Room, 13th St. Interlocking88 views
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Power Panel in Compressor Room, 13th St. Interlocking81 views
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Relay room at 13st. St. Interlocking, showing plug-in relays, RPQ rectifiers, and Ground Detector apparatus89 views
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Rear of Relay Rack in Relay Room, 13th St. Interlocking91 views
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Motorman (Charles R. Blade) operating tripper release at signal location A-18 and B-18, 13th St. Interlocking104 views
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Southbound train at signal location A-18 and B-18, 13th St. Interlocking91 views
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Southbound train at signal location A-18 and B-18, 13th St. Interlocking75 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 Jackson82 views
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Relays, transformers, and RPQ-41 rectifiers in signal room AB94 on continuous platform near Jackson86 views
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Looking north from Jackson on Continuous Platform showing singal location A-9387 views
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UR Interlocking machine, North Portal78 views
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UR Interlocking machine with 1st trick towerman, W.K. Wallace, North Portal92 views
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Plug-in relays in relay room, North Portal Interlocking82 views
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Rear of transformer & terminal panel showing North Portal Interlocking70 views
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Transformer & terminal panels, North Portal Interlocking80 views
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RPQ-121 Rectifier, North Portal Interlocking78 views
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Lake-Paulina80 views
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