6CL6 GE Power Pentode Miniature Vacuum Tube - NOS - TESTED

6CL6 Raytheon Power Pentode Miniature Vacuum Tube - NOS - TESTED

6CL6 Westinghouse Power Pentode Miniature Vacuum Tube - NOS - TESTED

6677/6CL6 RCA Power Pentode Vacuum Tube - NOS - TESTED

12DQ6B 12GW6 Sylvania Beam Power Pentode Vacuum Tube - NOS - TESTED

Sylvania 6BF5 l Beam Power Pentode AF Output Vacuum Tube - NOS - TESTED

6CU5 Sylvania Beam Power Pentode Vacuum Tube - NOS - TESTED

Sylvania USA Type 6JN6A Beam Power Pentode Sweep Vacuum Tube NOS/NIB