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it def needs some kind of antenna, even a short lengh of wire will help, but a good dipole antenna is best.
IIRC this one does not make the normal rushing sound that you get so quiet maybe normal with no signal.
As Reese said the osc maybe not working, and also you should check that 1st FM RF amp tube, but again the antenna is the 1st thing to check out.
You may also want to check out and plate load resistors that are in the FM sections to see if they have driffed way high.
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