NOS-42 NOS-47 166STANDARD_TUBE_SET GROUPING_PAIR_SO-12AX7WB 354STANDARD_TUBE_SET 156STANDARD_TUBE_SET JJ-7027A TS-12AT7 164STANDARD_TUBE_SET GROUPING_PAIR_TS-12AX7 NOS-12AX7-TELERP 221STANDARD_TUBE_SET GL-N709 TS-12AU7 323STANDARD_TUBE_SET NOS-5U4GB-GE NOS-6CA7-MULLARD-XF1 209STANDARD_TUBE_SET NOS-5814A-JAN SO-5AR4