6SF5 High Mu Triode Tube. Designed for service as a high gain audio-frequency amplifier and is especially useful in resistance-coupled amplifier circuits in AC or DC operated equipment. MFR: GE, Tung-Sol, Westinghouse,
VinylSavor: The Octal Phono Preamplifier, Part 1 : Circuit
6SF5 Sylvania NOS 1960's (1.1ma Gm=1500)
G.E 6sf5 nos .tested new | Reverb
Stereo Tube Amplifier
NOS NIB Date Matched Pair Radiotron RCA USA 6SF5 Metal Vacuum Tubes 100+% - VIVA TUBES
6SF5 Tube NOS RCA | Reverb
RCA 6SF5 Vacuum Tube Valve NOS NIB - Etsy
4 RCA 6SF5 Vacuum Tubes Valves NOS NIB Lot of Four - Etsy