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 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
VinylSavor: Tube of the Month : The 7F7
VinylSavor: Tube of the Month : The 7F7
7F7 Sylvania rebranded GE round gray plates NOS 1952 (2.0/2.4ma)
NOS RCA 7F7 Black Plates AUDIO AMPLIFIER VACUUM TUBE Tested Strong USA | eBay