106STANDARD_TUBE_SET GROUPING_QUAD_GL-KT77 78STANDARD_TUBE_SET 112STANDARD_TUBE_SET GROUPING_QUAD_EH-KT90 241STANDARD_TUBE_SET 227STANDARD_TUBE_SET GROUPING_QUAD_TS-6L6G NOS-5U4GB-RCA 508STANDARD_TUBE_SET 278STANDARD_TUBE_SET NOS-12AU7-CT 506STANDARD_TUBE_SET 58STANDARD_TUBE_SET NOS-12AY7 72STANDARD_TUBE_SET NOS-EF804S NOS-12AU7-TS 71STANDARD_TUBE_SET NOS-6072-GE-3MICA