There is a loop antenna that was thrown around an attic interior several decades ago, of long forgotten dimensions. I found the feed line. Is there a way to measure what (U.S. amateur) bands on which it might radiate most efficiently (if at all) without physical access?
Possible resources: A vintage Philmore FS-45 field strength meter. An old Versa Tuner with an SWR meter. Two portable SW radios.
ADDED: Is there a way to test or measure the characteristics of this antenna without keying a transmitter?