6CU5, Westinghouse, Beam Power Amplifier Vacuum Tube - NOS - TESTED

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

6CU5 RCA Power Pentode Vacuum Tube - NOS - TESTED

LOT OF 6 5AQ5 BEAM POWER PENTODE AMPLIFIER VACUUM TUBES,VARIOUS BRANDS TESTED

VINTAGE SLEEVE OF 5 NOS RCA 6GU5 PENTODE BEAM POWER VACUUM TUBES

ZENITH 7695 BEAM POWER PENTODE 9 PIN AUDIO AMPLIFIER VACUUM TUBE TESTED,BOXED

One ZENITH 6AD10 Tube NOS NIB Pentode/Beam Power Tube B&K Test Results

6AS5 RCA Beam Power Pentode Vacuum Tube - NOS - TESTED