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This has a heck of a lot more guts to it than the usual VCR RF modulator. Seven transformers/coils and four pots? Hard to imagine what that's for unless maybe this has a lower sideband suppression filter so it can be used in a master antenna system and not interfere with another source on channel 2.
Is there a frequency marking on the crystal in the lower right?
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Old TV literature, New York World's Fair, and other miscellany
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