6SN7GTPhilipsBranded MiniwattBaseBlackBrand ExtendedPhilips MiniwattCountryHollandGlass ColorSmoked GlassPermanentid7ol7e6k0Pin ColorSilver PinsMore 6SN7GT type tubes6SN7GTBranded Cossor6SN7GT, VT-231RCABranded Crc6SN7GT, VT-231Branded Ge6SN7GTBranded CbsHytron6SN7GT, R92Branded Mullard6SN7GT, R93MazdaBranded PhilipsMiniwatt6SN7GTBranded Brimar6SN7GTBranded Sylvania6SN7GT, VT-231Branded Tung-Sol6SN7GTBranded TungsramMore tubes manufactured by PhilipsEL34, SYOPhilipsBranded Tekade12AX7, ECC83PhilipsBranded Hammond12AX7APhilipsBranded AmiRoweEL34, XF4PhilipsBranded Valvo12AX7PhilipsBranded RogersECC83, MC0PhilipsBranded Valvo7693PhilipsBranded AmperexGZ34PhilipsBranded MullardEL34PhilipsBranded PopeEL34, 6CA7, SYOPhilipsBranded MullardMore tubes branded MiniwattECC83, MC1ValvoBranded PhilipsMiniwattECC83Branded MiniwattDarioE90FBranded MiniwattECC40Branded PhilipsMiniwatt6SN7GT, R93MazdaBranded PhilipsMiniwattECC83 12AX7Branded Miniwatt6189Branded MiniwattDario12AX7SBranded RTCMiniwattDario4654, 4654KBranded MiniwattDarioPhilipsEL34Branded MiniwattDario