ECC83B339F92MullardBranded MarconiPinched TipCode On Tubef92 B91CountryGreat BritainFactory CodeB - Mullard, BlackburnGlass ColorClear GlassPermanentid1zmm7bep4wPlate ColorMatte GrayPlate LookRibbed / ScalePlate Size17mmTip ShapePinched TipYear1959More ECC83 type tubesECC83, 12AX7ATelefunkenBranded LafayetteECC83, 12AX7, MC0SiemensBranded Tungsram12AX7, ECC83PhilipsBranded Hammond12AX7A, ECC83, 7025EiBranded Philips EcgECC83BrimarBranded ArkayECC83Branded United ElectronECC83Branded MiniwattDarioECC83, MCAValvoBranded TekadeECC83, MC1ValvoBranded PhilipsMiniwattECC83Branded TelefunkenMore B339 type tubesB339Branded HaltronECC83, B339, F91MullardBranded MarconiECC83, B339, I61Branded MarconiECC83, B339, I61MullardBranded MarconiECC83, B339Branded MarconiB339, 12AX7Branded Osram12AX7, ECC83, B339, I63Branded MarconiECC83, B339, I63PhilipsBranded MarconiB339, 12AX7Branded MarconiECC83, B339Branded MarconiMore tubes manufactured by MullardEL34, XF2MullardBranded SylvaniaCV491MullardEL37MullardBranded AmperexEL34, XF2MullardBranded Philips6CA7, EL34, XF2MullardBranded AmperexECC33, FX1MullardBranded ValvoECC82, I61MullardBranded ValvoEL34, XF2MullardBranded PhilipsEL34, 6CA7, XF2MullardBranded Siemens12AU7, K61MullardBranded TungsramMore tubes branded MarconiZ729, EF86Branded Marconi6CA7, XF4Branded MarconiECC82, B329, K61MullardBranded Marconi12AX7A, 7025AMarconiBranded Marconi12AX7Branded MarconiECC83, B339, F91MullardBranded MarconiECC83, 12AX7Branded MarconiB329, 12AU7Branded MarconiECC83, B339, I61Branded MarconiKT66Branded Marconi