6A10
Ballast Regulator
Base: Octal
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6A10	Amperite	NOS			NA

6A7
Pentagrid Converter
Base: 7-Pin
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6A7

6AB4
Hi-Mu Triode
Base: 7-mini
Alias: EC92
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AB4

6AC7
Sharp Cut-Off Pentode
Base: Octal
Alias: 1852
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AC7	Sylvania	NIB		Metal Can
6AC7	RCA	NIB		Metal Can

6AG7
Power Pentode
Base: Octal
Alias: 6AK7
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AG7	Sylvania	NIB		Metal Can	7000	5000
6AG7	RCA	NIB		Metal Can
6AG7	GE	NIB		Metal Can

6AH4, 6AH4GT
Low-Mu Triode
Base: Octal
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AH4GT	Sylvania	NIB

6AH6
Sharp Cut-Off Pentode
Base: 7-Mini
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AH6

6AK5, 6AK5W
Sharp Cut-Off Pentode
Base: 7-Mini
Alias: EF95, 6096, 5654
Data Sheet, Data Sheet(6AK5W)

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AK5
6AK5	Sylvania	Used
6AK5W	TungSol	NIB
6AK5W	RCA	NIB
6AK5W

6AK6
Power Pentode
Base: 7-Mini
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AK6	TungSol	NIB
6AK6	RCA	NIB
6AK6	Raytheon	USED
6AK6	RCA	USED	63-04
6AK6

6AL5
Twin Diode, Full wave Rectifier
Base: 7-Mini
Alias: 6EB5
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AL5	RCA	NIB	58-04
6AL5	Westinghouse	NIB	62-17
6AL5	Standard Brand	NIB	61-8
6AK5	Admiral	USED
6AK5

6AM6
Sharp Cut-Off Pentode
Base: 7-Mini
Alias: 6F91
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AM6	Mullard Italy	NIB			5250	3800
6AM6	Mullard Italy	NIB			5250	3800
6AM6	Mullard Italy	NIB			5250	3800
6AM6	Mullard Italy	NIB			5250	3800
6AM6	CEI	USED			5250	3800

6AM8, 6AM8A
Diode + Sharp Cut-Off Pentode
Base: 9-Mini
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AM8	Admiral	USED
6AM8		USED
6AM8A

6AN5
Beam Power Pentode
Base: 7-Mini
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AN5

6AN8, 6AN8A
Medium-Mu Diode, Sharp Cut-Off Pentode
Base: 9-Mini
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AN8	Westinghouse	NIB	61-17
6AN8A	Westinghouse	NIB	64-09
6AN8A

6AQ5, 6AQ5A, 6AQ5W
Beam Power Pentode
Base: 7-Mini
Alias: 6HG5, 6005
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AQ5
6AQ5A	GE	NIB
6AQ5A	RCA	NIB
6AQ5A	Sylvania	USED	6722-JFE
6AQ5A	GE	USED	KU 188-5
6AQ5W

6AQ8
Twin High-Mu Triode
Base: 9-Mini
Alias: ECC85
Data Sheet: NONE

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AQ8

6AS5
Beam Power Pentode
Base: 7-Mini
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AS5	Sylvania	NIB

6AS6
Dual Control Pentode
Base: 7-Mini
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AS6	RCA	NIB
6AS6	Raytheon	NIB
6AS6	TungSol	NIB
6AS6

6AS7, 6AS7GA
Low-Mu Twin Triode
Base: Octal
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AS7
6AS7GA	GE	NIB	60-30, 188-5
6AS7GA	GE	USED

6AS8
Diode, Sharp Cut-Off Pentode
Base: 9-Mini
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AS8	RCA	NIB
6AS8

6AT6
Dual Diode + Hi-Mu Triode
Base: 7-Mini
Alias: 6BK6
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AT6

6AU4, 6AU4GT, 6AU4GTA
Diode
Base: Octal
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AU4GTA	Westinghouse	Used	63-39
6AU4GT	Admiral	Used	Raytheon (280, 6-06)

6AU5, 6AU5GT
Beam Pentode
Base: Octal
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AU5GT	GE	NOS
6AU5GT	Westinghouse	NOS
6AU5GT	Raytheon	NOS

6AU6, 6AU6A, 6AU6WA
Sharp Cut-Off Pentode
Base: 7-Mini
Alias: EF94
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AU6A	RCA	USED
6AU6	Sylvania	USED	61-22
6AU6A	GE	NIB
6AU6	Mullard/Great Britain	NIB
6AU6	RCA	NIB

6AU8A
Sharp Cut-Off Pentode + Medium Mu Triode
Base: 9-Mini
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AU8A

6AV6
Dual Diode + Hi-Mu Triode
Base: 7-Mini
Alias: EBC91
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AV6	Standard Brand	NIB
6AV6	RCA	NIB
6AV6	Sylvania	NIB	64-41

6AW8, 6AW8A
Sharp Cut Pent. + Med.Mu Triode
Base:
Alias:
Data Sheet
Data Sheet-A

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AW8	RCA	NIB
6AW8A	CEI-Japan	NIB
6AW8A	Westinghouse	USED
6AW8	RCA	USED
6AW8A	Raytheon	NIB	Tektronix Matched
6AW8A	Raytheon	NIB	Tektronix Matched

6AX4GT
Diode
Base: Octal
Alias:
Data Sheet

Tube	Manufacturer	Condition	Date Code	Shape	Test 539C	Minimum 539C
6AX4GT	CEI-Holland	NIB

6A10 Ballast Regulator Base: Octal Data Sheet

6A7 Pentagrid Converter Base: 7-Pin Data Sheet

6AB4 Hi-Mu Triode Base: 7-mini Alias: EC92 Data Sheet

6AC7 Sharp Cut-Off Pentode Base: Octal Alias: 1852 Data Sheet

6AG7 Power Pentode Base: Octal Alias: 6AK7 Data Sheet

6AH4, 6AH4GT Low-Mu Triode Base: Octal Data Sheet

6AH6 Sharp Cut-Off Pentode Base: 7-Mini Data Sheet

6AK5, 6AK5W Sharp Cut-Off Pentode Base: 7-Mini Alias: EF95, 6096, 5654 Data Sheet, Data Sheet(6AK5W)

6AK6 Power Pentode Base: 7-Mini Alias: Data Sheet

6AL5 Twin Diode, Full wave Rectifier Base: 7-Mini Alias: 6EB5 Data Sheet

6AM6 Sharp Cut-Off Pentode Base: 7-Mini Alias: 6F91 Data Sheet

6AM8, 6AM8A Diode + Sharp Cut-Off Pentode Base: 9-Mini Alias: Data Sheet

6AN5 Beam Power Pentode Base: 7-Mini Alias: Data Sheet

6AN8, 6AN8A Medium-Mu Diode, Sharp Cut-Off Pentode Base: 9-Mini Alias: Data Sheet

6AQ5, 6AQ5A, 6AQ5W Beam Power Pentode Base: 7-Mini Alias: 6HG5, 6005 Data Sheet

6AQ8 Twin High-Mu Triode Base: 9-Mini Alias: ECC85 Data Sheet: NONE

6AS5 Beam Power Pentode Base: 7-Mini Alias: Data Sheet

6AS6 Dual Control Pentode Base: 7-Mini Alias: Data Sheet

6AS7, 6AS7GA Low-Mu Twin Triode Base: Octal Alias: Data Sheet

6AS8 Diode, Sharp Cut-Off Pentode Base: 9-Mini Alias: Data Sheet