572STANDARD_TUBE_SET 598STANDARD_TUBE_SET 157STANDARD_TUBE_SET NOS-X199 NOS-75 NOS-6DJ8 567STANDARD_TUBE_SET 599STANDARD_TUBE_SET 557STANDARD_TUBE_SET NOS-6SC7GT NOS-6J5G NOS-12AU7A-RCA 581STANDARD_TUBE_SET 474STANDARD_TUBE_SET 550STANDARD_TUBE_SET NOS-6AS7G NOS-6E5-U NOS-6689 577STANDARD_TUBE_SET 600STANDARD_TUBE_SET