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7F7 High Mu Twin Triode Tube. Designed for use as a voltage amplifier in resistance coupled cascade or phase inverter service.. MFR: RCA, GE, Sylvania, Crosley. SKU: 7F7. New old stock. No
7F7 TUBE -Experience Pure Analog Sound with our Premium Vacuum Tube for High-Fidelity Audio Systems – Big River Hardware
NOS GE 7F7 Vacuum tube - White box - Tested | eBay