Prime Focus of the 140-foot

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Prime Focus of the 140-foot

Original ring feed of the 140-foot telescope

Sitting 60 feet above the dish of the 140-foot telescope was this original feed ring. Radio waves bouncing from the 43-meter parabolic dish came to a focus directly where the receiver would have been placed, inside the black cartridge of this ring.

Credit: NRAO/AUI/NSF

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Prime Focus of the 140-foot

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