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Fun Stuff (not insulators) > Small 6S4A tube amplifier, front view
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6S4A RCA Audio Vacuum Tube Valve - Bangybang
6S4A Medium Mu Triode Tube. Designed to be used as the vertical deflections amplifier in TV receivers. MFR: GE, RCA, Sylvania. SKU: 6S4A. New old stock. No longer available for export.
6S4A - Vint'Elec - Vintage electronic tubes
Has anyone tried a 6S4A as a 300B driver tube? | Page 2 | diyAudio
True NOS NIB RCA USA 6S4A Grey Plate Top O Get Vacuum Tube - VIVA TUBES
Power tubes
VinylSavor: Tube of the Month : The 6S4A
6S4A Tube USA Brand 6S4 Vacuum Tube DL92 VT-174 N17 2P2 CV484 CV820 3S4 NOS | eBay