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Antique tunable electrical resonator
Antique tunable electrical resonator patented in 1951 by JM Wolf. Patent # 2566050. Can be used as an echo box to test radar. This unit is essentially a tunable capacitor. The knob moves a silver plated plate back and forth in a cavity.
Solid brass construction. Three Silver plated connectors. Interior is silver plated. Knob turns to tune frequency. With carrying handle and rubber isolation feet.
Patent office drawings can be viewed at www.uspto.gov.
