506STANDARD_TUBE_SET 58STANDARD_TUBE_SET NOS-12AY7 72STANDARD_TUBE_SET NOS-EF804S NOS-12AU7-TS 71STANDARD_TUBE_SET NOS-6072-GE-3MICA NOS-6SN7GT-B-RCA 505STANDARD_TUBE_SET NOS-4CX250B NOS-12AX7-SYL-DOM 61STANDARD_TUBE_SET GROUPING_QUAD_TS-KT120 NOS-12AU7-RCA-BP 329STANDARD_TUBE_SET 62STANDARD_TUBE_SET NOS-12AX7-GE GROUPING_QUAD_JJ-KT88B NOS-7199