Radio Valve Data: 1915-1960

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Radio Valve Data: 1915-1960

Keith R Thrower OBE, The Valve Museum, April, 2022.

Extras ▼

Note: The date given is for when the valves became generally available in the UK. Many of these, however, were sold in Britain in the early 1930s.

Within the museum USA makers and brands have separate sets of entries. eg ITT - Philco - Raytheon - RCA - Western Electric - Westinghouse et al.

Help information: Abbreviations - Explanations - Notes.

Post-1925 amplifying valves, frequency changers and signal diodes
Type	Description	Filament		Anode		Auxillary Grid		Grid	r_a	g_m/g_o	R_L	P_o	R_k	Base^{(1)Pin-out details for non-exhibits can be found with the base details.}		Year
		Volts	Amps	Volts	mA	Volts	mA	-V	kΩ	mA/V	kΩ	Watts	Ω	Type	Ref
US (American Type designations)
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
00-A	Triode	5.0*	0.25	90	2.5	-	-	4.5	11.0	0.73				USM4b	1	1937
01-A	Triode	5.0*	0.25	90	3.2	-	-	4.5	9.4	0.85				USM4b	1	1937
1A4-P = 1D5 1A4-T	VM RF pentode VM RF tetrode	2.0*	60mA	135	2.2	67.5	0.9	3.0	1MΩ	0.65				USS4+tc	2	1936
1A5-G, 1A5-GT	Output pentode	1.4*	50mA	90	4.0	90	1.1	4.5	300.0	0.85	25.0	115mW		IO	78	1939
1A6	Heptode FC	2.0*	60mA	mix135 osc135	1.8 2.0	67.5	2.1	3.0	400.0	0.27⅄				USS6+tc	1	1936
1A7-G, 1A7-GT	Heptode FC	1.4*	50mA	mix90 osc90	0.55 1.2	90	0.6	0	600.0	0.25⅄				IO	76	1938
1A8	Diode, triode & pentode	1.4*	0.1*	90	1.2	90	0.3	0	600.0	0.75				IO+tc	94
1AB5	RF pentode	1.2*	50mA	90	3.5	90	0.8	0	270.0	1.1				B8G	39
1AC5	Output pentode	1.25*	40mA	67.5	2.0	67.5	0.4	4.5	150.0	0.75	25.0	50mW		Wires	-
1AD4	RF pentode	1.25*	0.10	45	3.0	45	0.8	0	500.0	2.0				Wires	-
1AD5	RF pentode	1.25*	40mA	67.5	1.85	67.5	0.7	0	700.0	0.74				Wires	-
1AE5	Heptode	1.25*	60mA	45	0.9	45	2.0	0	200.0	0.2⅄				Wires
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
1B4-P	RF pentode	2.0*	60mA	180	1.7	67.5	0.6	3.0	1MΩ	0.64				USS4+tc	2	1938
1B5/25S	Double diode triode	2.0*	60mA	135	0.80	-	-	3.0	35.0	0.57				USS6+tc	3	1936
1B7-GT	Heptode FC	1.4*	0.10	mix90 osc90	1.5 1.6	45.0	1.3	0	350.0	0.35⅄				IO+tc	76
1B8-GT	Diode, triode & output pentode	1.4*	0.10	t90 p90	0.15 6.3	- 90	- 1.4	0 6		0.275 1.15	14.0	0.21		IO+tc	92
1C5-G, 1C5-GT	Output pentode	1.4*	0.10	90	7.5	90	3.5	7.5	115.0	1.55	8.0	0.24		IO	78	1939
1C6	Heptode FC	2.0*	0.12	mix135 osc135	1.3 3.1	67.5	2.5	3.0	600.0	0.30⅄				USS6+tc	1	1936
1C7-G	Heptode FC	2.0*	0.12	mix135 osc135	1.3 3.1	67.5	2.5	3.0	600.0	0.30⅄				IO+tc	76	1937
1C8	Heptode FC	1.25*	40mA	30	0.32	30	0.75	0	300.0	0.1⅄				None	-
1D5-GT	VM RF pentode	2.0*	60mA	180	2.3	67.5	0.8	3/15	1MΩ	0.75				IO+tc	77	1937
1D7-G	Heptode FC	2.0*	60mA	mix135 osc135	1.8 2.0	67.5	2.1	3.0	400.0	0.2⅄				IO+tc	76	1937
1D8-GT	Diode, triode & output pentode	1.4*	0.10	p90 t90	5.0	90	1.0	9.0 0	200.0 43.5	0.92 0.57	12.0	0.2		IO	92	1940s
1DN5	Diode & RF pentode	1.4*	50mA	67.5	2.1	67.5	0.55	0	600.0	0.63				B7G	11
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
1E4-G	Medium-μ triode	1.4*	50mA	90	1.4	-	-	3.0	19.0	0.76				IO	81
1E5-G, 1E5-GT	RF tetrode	2.0*	60mA	135	1.7	67.5	0.4	3.0	950.0	0.64				IO+tc	77	1937
1E5-GP	RF pentode	2.0*	60mA	180	1.7	67.5	0.6	3.0	1.5M	0.64				IO+tc	77
1E7-G 1E7-GT	Double output pentode (Class A push-pull)	2.0*	0.24	135	10.5	100	3.5	7.5			24.0	0.57		IO	97	1937
1E8	Heptode	1.25*	40mA	67.5	1.0	45	1.5		300.0	0.2⅄				Wires	-
1F4 1F5-G	Output pentode	2.0*	0.12	135	8.0	135	2.4	4.5	200.0	1.70	16.0	0.31		USM5 IO	3 78	1936 1937
1F6 1F7-G	Double diode pentode	2.0*	60mA	180	2.2	67.5	0.7	1.5	1MΩ	0.65				USS6+tc IO	10 79	1936 1937
1G4-GT	Low-μ triode	1.4*	50mA	90	2.3	-	-	6.0	10.7	0.83				IO	81	1940s
1G5-G	Output pentode	2.0*	0.12	135	9.5	135	3.6	13.5	160.0	1.55				IO	78	1938
1G6-GT	Double output triode Class B2 push-pull	1.4*	0.10	90	2/11	-	-	0	45.0	0.68	12.0	0.35		IO	96	1940s
1H4-G	Low-μ triode	2.0*	60mA	180	3.1	-	-	13.5	10.3	0.90				IO	81	1937
1H5-G 1H5-GT	Single diode triode	1.4*	50mA	90	0.15	-	-	0	240.0	0.28				IO+tc	91	1939
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
1H6-G	Double diode triode	2.0*	60mA	135	0.80	-	-	3.0	35.0	0.58				IO	80	1937
1J5-G	Output pentode	2.0*	0.12	135	7.0	135	2.0	16.5	100.0	0.95	13.5	0.45		IO	78
1J6-G, 1J6-GT	Class B double triode	2.0*	0.24	135	5/27	-	-	0			10.0	2.1		IO	96	1937
1L6	Heptode FC	1.4*	50mA	mix90 osc90	0.5 2.0	45	0.6		650.0	0.3⅄				B7G	90
1LA4	Output pentode	1.4*	50mA	90	4.0	90	1.1	4.5	300.0	0.85	25.0	0.115		B8G	27	1940s
1LA6	Heptode FC	1.4*	0.05	mix90 osc90	0.55 1.2	90	0.6	0	600.0	0.25⅄				B8G	29	1940s
1LB4	Output pentode	1.4*	0.10	90	5.0	90	1.0	9.0	200.0	0.93	12.0	0.20		B8G	27	1940s
1LB6	Heptode FC	1.4*	50mA	9067.5	0.4	0	2.2							B8G	30
1LC5	VM RF pentode	1.4*	50mA	90	1.15	45	0.2	0	1.5MΩ	0.78				B8G	24
1LC6	Heptode FC	1.4*	50mA	90	0.8	45	1.9	0	800.0	0.25⅄				B8G	29	1940s
1LD5	Diode & RF pentode	1.4*	50mA	90	0.6	45	0.1	0	950.0	0.60				B8G	31
1LE3	Medium-μ triode	1.4*	50mA	90	1.3	-	-	3.0	19.0	0.76				B8G	36
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
1LG5	VM RF pentode	1.4*	50mA	90	1.7	45	0.4	0	1MΩ	0.80				B8G	33
1LH4	Single diode triode	1.4*	50mA	90	0.15	-	-	0	240.0	0.28				B8G	26	1940s
1LN5	RF pentode	1.4*	50mA	90	1.6	90	0.35	0	1.1MΩ	0.80				B8G	28	1940s
1N5-G, 1N5-GT	RF pentode	1.4*	50mA	90	1.2	90	0.3	0	1.5M	0.75				IO+tc	77	1939
1N6-G	Diode & output pentode	1.4*	50mA	90	3.4	90	1.2	4.5	300.0	0.80	25.0	0.10		IO	84
1P5-GT	VM RF pentode	1.4*	50mA	90	2.3	90	0.7	0	800.0	0.75				IO+tc	77
1Q5-GT	Output beam tetrode	1.4*	0.10	90	9.5	90	1.3	4.5	75.0	2.20	8.0	0.27		IO	78	1940
1R4 = 1294	Single diode	1.4*	0.15	30	0.34									B8G	23	1940s
1R5	Heptode FC	1.4*	50mA	90	0.80	45	1.9	0	800.0	0.25⅄				B7G	3	1940s
1S4	Output beam tetrode	1.4*	50mA	90	7.4	67.5	1.4	7.0	100.0	1.58	8.0	0.27		B7G	4	1940s
1S5	Diode & RF pentode	1.4*	50mA	67.5	1.6	67.5	0.4	0	600.0	0.63				B7G	5	1940s
1SA6	RF pentode	1.4*	50mA	90	2.45	67.5	0.68	0	800.0	0.97				IO	89
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
1T4	VM RF pentode	1.4*	50mA	90	3.5	67.5	1.5	0	900.0	0.90				B7G	2	1940s
1T5-GT	Output beam tetrode	1.4*	50mA	90	6.5	90	1.5	6.0	250.0	1.15	14.0	0.17		IO	78	1940s
1T6	Diode & RF pentode	1.25*	40mA	67.5	1.6	67.5	0.4	0	400.0	0.60				Wires	-
1U4	RF pentode	1.4*	50mA	90	1.6	90	0.45	0	1.5MΩ	0.45				B7G	2
1U5	Diode & RF pentode	1.4*	50mA	67.5	1.6	67.5	0.40	0	600.0	0.625				B7G	11
1V5	Output pentode	1.25*	40mA	67.5	2.0	67.5	40ma	4.5	170.0	0.75				Wires
1W5	RF pentode	1.25*	40mA	67.5	1.85	67.5	0.75	0	700.0	0.74				Wires	-
2A3	Output triode Class AB1 push-pull	2.5*	2.50	250 300	60.0 147	-	-	45.0 62.0	0.8	5.25	2.5 3.0	3.5 15.0	750	USM4	1	1936
2A5	Output pentode	2.5	1.75	250	34.0	250	6.5	16.5	100.0	2.20	7.0	3.0		USM6	8	1936
2A6	Double diode triode	2.5	0.80	250	0.40	-	-	1.35	91.0	1.10				USS6	4	1936
2A7, 2A7S	Heptode FC	2.5	0.80	mix250 osc200	3.5 4.0	100	2.2	3/35	360.0	0.52⅄				USS7+tc	1	1936
2AF4-A	Medium-μ triode	2.35	0.60	80	16.0	-	-	-	2.27	6.60				B7G	60
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
2B6	Direct coupled double triode	2.5	2.25	250	40.0	-	-	24.0	5.2	3.50	5.0	4.0		USM7	4	1936
2B7	Double diode VM RF pentode	2.5	0.8	250	9.0	125	2.3	3.0	650.0	1.10				USS7+tc	2	1936
2B7S	Double diode VM RF pentode	2.5	0.8	250	6.0	100	1.5	3.0	800.0	1.00				USS7+tc	2
2BN4	Medium-μ triode	2.3	0.60	150	9.0			6.0	6.3	6.8				B7G	91
2C21	Double triode	6.3	0.60	250	8.3	-	-	16.5	7.0	1.40				USS7+tc	15
2C22	Triode	6.3	0.30	300	11.0	-	-	10.5	6.6	3.00				IO+2tc	107
2C23 = Type 10	Output triode (Class B push-pull)	7.5*	1.25	425 425	18.0 55.0	-	-	40.0 50.0	5.0	1.60	10.2 8.0	1.6 25.0	0	USM4	1
2C51	Double triode	6.3	0.30	150	8.2	-	-	2.0	5.5	2.20				B9A	4
2CY5 = 6CY5	RF tetrode	2.4	0.60	10.0	80	1.5	1.0	100.0	8.0					B7G	14
2E30	Power pentode	6.3*	0.65	250	50	200	10.0	50.0						B7G	92
2E31	RF pentode	1.25*	50mA	22.5	0.4	22.5	0.3	0		0.5				Wires	-
2E32	RF pentode	1.25*	50mA	22.5	0.4	22.5	0.3	0	350.0	0.5				Wires	-
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
2E41	Diode & RF pentode	1.25*	30mA	22.5	0.35	22.5	0.12	0						Wires	-
2E42	Diode & RF pentode	1.25*	3mA	22.5	0.35	22.5	0.12	0	250.0	0.37				Wires	-
3A5	Double triode	1.4*	0.22*	90	3.7	-	-	2.5	8.3	1.80				B7G	8
3A8-GT	Diode, triode & pentode	1.4*	0.10*	p90 t90	1.5 0.2	90	0.50	0 0	800.0 200.0	0.75 0.35				IO	94
3AF4-A	Medium-μ triode	3.15	0.45	80	16.0	-	-	2.4	2.27	6.60				B7G	60
3AL5	Double diode	3.15	0.60	150	9.0	-	-	-	-	-				B7G	18
3AU6	RF pentode	3.15	0.60	250	10.8	150	4.3	1.0	1MΩ	5.2				B7G	16
3AV6	Double diode triode	3.15	0.60	250	1.2	-	-	2.0	62.5	1.60				B7G	19
3B5	Output beam tetrode	1.4*	0.10*	67.5	8.0	67.5	0.60	7.0	100.0	0.65	5.0	0.2		IO	87
3B7 = 1291	RF double triode	1.4*	0.22*	90	5.2	-	-	0	11.35	1.85				B8G	34	1940s
3C5	Output pentode	1.4*	0.10*	90	6.0	90	1.4	9.0		1.55	8.0	0.24		IO	87
3C6	Double triode	1.4*	0.10*	90	4.5	-	-	0	11.2	1.30				B8G	35
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
3D6	RF tetrode	1.4*	0.22*	135	5.7	90	0.7	6.0	150.0	2.20				B8G	32	1940s
3E6	RF pentode	1.4*	0.10*	90	3.8	90	1.3	0	300.0	2.1				B8G	44
3LE4	Output pentode	2.8*	50mA	90	9.0	90	1.8	9.0	110.0	1.60	6.0	0.30		B8G	32
3LF4	Output beam tetrode	1.4*	0.10*	90	8.0	90	1.0	4.5	80.0	2.00	7.0	0.23		B8G	32
3Q4	Output pentode	1.4*	0.10*	90	9.5	90	2.1	4.5	100.0	2.15	10.0	0.27		B7G	6	1940s
3Q5-GT	Output beam tetrode	1.4*	0.10*	110	10.0	110	1.4	6.6	100.0	2.20	8.0	0.40		IO	87	1940s
3S4	Output pentode	1.4* 2.8*	0.10* 0.05	90 90	6.1 7.4	67.5 67.5	1.1 1.4	7.0 7.0		1.43 1.58	8.0 8.0	0.23 0.27		B7G	6	1940s
3SB6	RF pentode	1.4*	50mA	90	1.45	67.5	0.38	0	700.0	0.67				IO	78
3V4	Output pentode	1.4*	0.10*	90	9.5	90	2.1	4.5	100.0	2.15	10.0	0.27		B7G	9
4A6-G	Class B double triode	2.0*	0.12*	90	1.5	-	-	1.5		0.9	8.0	1.0		IO	95
6A3	Output triode (Class AB1 push-pull)	6.3*	1.00	250 300	60.0 100.0	-	-	45.0	0.8	5.25	2.5 5.0	3.2 10.0	750 300	USM4	1	1937
6A4/LA	Output pentode	6.3*	0.30	180	22.0	180	3.9	12.0	45.0	2.20	8.0	1.4	465	USM5	3	1936
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6A5-G	Output triode	6.3	1.00	250	60.0	-	-	45.0	0.8	5.25	2.5	3.75	800	IO	20	1940s
6A6	Double output triode (Class B2 push-pull)	6.3	0.80	300	35.0 70.0	-	-	0	23.0	1.60	8.0	10.0		USM7	5	1936
6A7, 6A7S	Heptode FC	6.3	0.30	mix250 osc100	3.5 4.0	100	2.7	3.0	550.0	0.55⅄				USS7+tc	1	1936
6A8, 6A8-G 6A8-GT	Heptode FC	6.3	0.30	mix250 osc100	3.5 4.0	100	2.7	3.0	550.0	0.55⅄				IO	1	1936
6AB4	High-μ triode	6.3	0.15	250	10.0	-	-	2.0	10.0	5.50				B7G	45
6AB6-G	Direct coupled output triode	6.3	0.50	250	34+5	-	-	0	4.0	1.80	8.0	3.5		IO	23
6AB7 = 1853	VM RF pentode	6.3	0.45	300	12.5	200	3.2	3.0	700.0	5.00				IO	10	1940s
6AC5-G, 6AC5-GT	Output triode Class B2 push-pull	6.3	0.40	250	32.0 110pk	-	-	from driver	36.0	3.40	7.00 10.0	3.7 8.0		IO	20
6AC6	Direct coupled twin triode	6.3	1.10	180	45	-	-	0		3.0	4.0	3.8		IO	23
6AC7 = 1852	RF pentode	6.3	0.45	300	10.0	150	2.5	2.0	1M?	9.00				IO	10	1940s
6AD5-G/-GT	High-μ triode	6.3	0.30	250	0.90	-	-	2.0	66.0	1.50				IO	20
6AD7-G	Triode & output pentode	6.3	0.85	t250 p250	3.7 36.0	250	10.5	25.0 16.5	19.0 80.0	0.33 2.50	7.0	3.2		IO	42
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6AE5-GT	Low-μ triode	6.3	0.30	95	7.0	-	-	15.0	3.5	1.20				IO	20
6AE6-G	Twin anode triode	6.3	0.15	250	6.5	-	-	1.5	23.0	1.00				IO	23
6AE7-GT	Twin input triode	6.3	0.50	250	5.0	-	-	13.5	9.3	1.5				IO	24
6AF4-A	Medium-μ triode	6.3	0.225	80	16.0	-	-	2.4	2.27	6.60				B7G	60
6AF5	Low-μ triode	6.3	0.30	180	7.0	-	-	18.0	4.9	1.5				IO	20
6AG5	RF pentode	6.3	0.30	250	7.0	150	2.0	1.8	800.0	5.0				B7G	14
6AG7	Power pentode for TV	6.3	0.65	300	30.0	150	7.0	3.0	130.0	11.0	10.0	3.0		IO	11
6AH5-G	See 6L6													-	-
6AH6	RF pentode	6.3	0.45	300	10.0	150	2.5	-	50.0	9.00			160	B7G	16
6AG5, 6AQ5-A	Output beam tetrode	6.3	0.45	250	45.0	250	4.5	12.5	52.0	4.10	10.0	1.1	240	B7G	27
6AL5	Double diode	6.3	0.30	150	9.0	-	-	-	-	-				B7G	18
6AL6	Output beam tetrode	6.3	0.90	250	72.0	250	5.o	14.0	22.5	6.0	2.5	6.5	180	IO+tc	38
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6AM4	High-μ triode	6.3	0.225	200	10.0	-	-	1.0	8.7	9.80				B9A	38
6AN5	Output pentode	6.3	0.50	120	35.0	120	12.0	6.0	12.5	8.00				B7G	14
6AN6	Quad diode	6.3	0.20	75	3.5	-	-	-	-	-				B7G	38
6AQ5, 6AQ5-A	Output beam tetrode Class AB1 push-pull	6.3	0.45	250 250	45.0 2x35	250 250	4.5 2x2.5	12.5 15.0	52.0	4.10	5.0 10.0	4.5 10.0		B7G	27
6AQ6	Double diode triode	6.3	0.15	250	1.1	-	-	3.0	58.0	1.20				B7G	19
6AQ7-GT	Double diode triode	6.3	0.30	250	2.3	-	-	2.0	44.0	1.60				IO	32	1940s
6AR5	Output pentode	6.3	0.40	250	35.0	250	5.5	16.5	65.0	2.4	7.0	3.2		B7G	41
6AR6	Output beam tetrode	6.3	1.20	250	77.0	250	5.0	22.5	21.0	5.4				IO	37
6AR7	Diode, triode & rectifier	6.3	0.30	250	1.30	-	-	2.0	66.5	1.05				IO	33
6AS5	Output beam tetrode	6.3	0.80	150	36.0	110	6.5	8.5		5.6	4.5	2.2		B7G	42
6AS6	RF pentode	6.3	0.175	120	5.5	120	3.5	2.0		3.5				B7G	12
6AS7-G	Double triode series regulator	6.3	2.50	135	125.0	-	-	31.5	0.28	7.50			250	IO	26
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6AT6	Double diode triode	6.3	0.30	250	1.0	-	-	3.0	58.0	1.20				B7G	19
6AU5-GT	Output beam tetrode	6.3	1.25	450	85.0	175		50.0		6.00				IO	140
6AU6	RF pentode	6.3	0.30	250	10.6	150	4.3	6.5	1MΩ	5.20			68	B7G	16
6AU7	Medium-μ double triode	6.3	0.30*	250	10.5	-	-	8.5	7.7	2.20				B9A	1
6AV6	Double diode triode	6.3	0.30	250	1.2	-	-	2.0	62.5	1.60				B7G	19
6B4-G	Output triode	6.3*	1.00	250	60.0	-	-	45.0	0.8	5.25	2.5	3.2	750	IO	81	1937
6B5 = 6N6	Triode & direct coupled output triode	6.3	0.80	t300 ot300	9.0 42.0	- br>	-	0 int. to k	24.0	2.40	7.0	4.0		USM6	5	1936
6B6-G	Double diode triode	6.3	0.30	250	0.9	-	-	2.0	91.0	1.10				IO+tc	29	1940
6B7, 6B7S, 6B8, 6B8-G	Double diode & VM RF pentode	6.3	0.30	250	9.0	125	2.3	3.0	600.0	1.12				USS7+tc IO+tc	2 15	1936 1937
6BA6	VM RF pentode	6.3	0.30	250	11.0	100	4.2	0/20	1MΩ	4.4			68	B7G	16
6BA7	Heptode FC	6.3	0.30	250	3.8	100	10.0	1.0	1MΩ	0.95⅄				B9A	3
6BD6	VM RF pentode	6.3	0.30	250	9.0	100	3.5	3.0	700.0	2.00			240	B7G	16
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6BE6	See Brimar													-	-
6BF6	Double diode triode	6.3	0.30	250	9.5	-	-	9.0	8.5	1.90				B7G	19
6BG6-G 6BG6-GA	Line timebase output beam tetrode	6.3	0.90	700	70.0	350	6.0		30.0	6.00				IO+tc	39
6BJ6	See Brimar													-	-
6BQ5	See Brimar													-	-
6BQ7, 6BQ7-A	See Brimar													-	-
6BR5 6BR8-A	See Brimar													-	-
6C4	Power triode	6.3	0.15	250	10.5	-	-	8.5	7.7	2.20				B7G	15
6C5, 6C5-G/-GT	Medium-μ triode	6.3	0.30	250	8.0	-	-	8.0	10.0	2.00				IO	20	1936
6C6	RF pentode	6.3	0.30	250	2.0	100	0.5	3.0	1MΩ	1.20				USS6+tc	2	1936
6C7	Double diode triode	6.3	0.30	250	4.5	-	-	9.0	16.0	1.25				USS7+tc	9	1937
6C8-G	Double triode	6.3	0.30	250	3.2	-	-	0	22.5	1.60				IO+tc	28
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6CB6, 6CB6-A	RF pentode	6.3	0.30	200	9.5	150	2.8	-	600.0	2.2				B7G	32
6CY5	RF tetrode	6.3	0.20	125	10.0	80	1.5	1.0	100.0	8.0				B7G	14
6D5-G	Output triode	6.3	0.70	275	31.0	-	-	40.0	2.24	2.10	7.2	1.4	1300	IO	20	1936
6CD6-G, 6CD6-GA	See Brimar													-	-
6D6	VM RF pentode	6.3	0.30	250	8.2	100	2.0	3.0	800.0	1.60				USS6+tc	2	1936
6D7 = 6J7	RF pentode	6.3	0.30	250	2.0	100	0.50	3.0	1MΩ	1.23				USS7+tc	11
6D8-G	Heptode FC	6.3	0.15	mix250 osc135	3.5 4.3	100	2.6	3.0	400.0	0.55⅄				IO+tc	1	1937
6E6	Double output triode (Class A push-pull)	6.3	0.60	250	18.0	-	-	27.5	3.5	1.70	14.0	1.6		USM7	5	1937
6E7	VM RF pentode	6.3	0.30	250	8.2	100	2.0	3.0	800.0	1.60				USS7+tc	11	1937
6EH6	RF pentode	6.3	0.15	250	7.4	150	2.9	1.0	1.4MΩ	4.6				B7G	32
6F4	UHF triode	6.3	0.225	80	13.0	-	-	-	2.9	5.8			150	7-pin
6F5, 6F5-G/-GT	High-μ triode	6.3	0.30	250	0.9	-	-	2.0	66.0	1.50				IO+tc	18	1936
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6F6, 6F6-G/-GT	Output pentode	6.3	0.70	285	38.0	285	12.0	22.0	78.0	2.55	7.0	4.5	440	IO	36	1936
6F7, 6F7S	Triode pentode FC (See also below)	6.3	0.30	mix250 osc100	2.8 2.4	100	0.6	3.0	2MΩ	0.3⅄				USS7+tc	13
6F7, 6F7S	Triode & VM pentode (See also above)	6.3	0.30	t100 p250	6.3 6.5	- 100	- 1.5	3.0 3.0	20.0 850.0	0.53 1.10				USS7+tc	13	1936
6F8-G	Medium mu double triode	6.3	0.60	250	9.0	-	-	8.0	7.7	2.60				IO+tc	28	1940s
6G6-G	Output pentode	6.3	0.15	180	15.0	180	2.5	9.0	175.0	2.30	10.0	1.1	540	IO	36	1937
6G8-G	Double diode & VM RF pentode	6.3	0.30	250	6.5	100	1.5	3.0	850.0	1.10				IO+tc	15
6H4-GT	Single diode	6.3	0.10	100	4.0	-	-	-	-	-				IO	56	1940s
6H6, 6H6-G/-GT	Double diode	6.3	0.30	150	8.0	-	-	-	-	-				IO	53	1936
6H8	Double diode & RF pentode	6.3	0.30	250	8.5	100		2.0	650.0	2.40				IO+tc	15
6J4	UHF triode	6.3	0.40	150	15.0	-	-	-	4.5	12.0			100	B7G	30
6J5, 6J5-G/-GT	Medium-μ triode	6.3	0.30	250	9.0	-	-	8.0	7.7	2.60				IO	20	1936
6J6	Medium mu double triode	6.3	0.45	100	8.5	-	-	0.85	7.1	5.3				B7G	17
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6J7, 6J7-G/-GT	RF pentode	6.3	0.30	250	2.0	100	0.5	3.0	1.5MΩ	1.25				IO+tc	8	1936
6J8-G	Triode heptode FC	6.3	0.30	h250 t100	1.3 5.0	100	2.9	3.0	290.0	0.29⅄				IO+tc	3
6K4	Medium-μ triode	6.3	0.15	100	12.0	-	-	2.0	3.65	5.50				Wires	-
6K5G, 6K5-GT	High-μ triode	6.3	0.30	250	1.1	-	-	3.0	50.0	1.40				IO+tc	19	1936
6K6-GT	Output pentode	6.3	0.40	315	28.0	250	9.0	21.0	75.0	2.10	9.0	4.5	570	IO	36	1937
6K7, 6K7-G/-GT	VM RF pentode	6.3	0.30	250	10.5	125	2.6	3.0	600.0	1.65				IO+tc	8	1936
6K8, 6K8-G/-GT	Triode hexode FC	6.3	0.30	h250 t250	2.5 3.8	100	6.0	3.0	600.0	0.36⅄				IO+tc	4	1938
6L4	See 6F4													-	-
6L5-G	Medium-μ triode	6.3	0.15	250	8.0	-	-	9.0	9.0	1.90				IO	20	1936
6L6, 6L6-G, 6L6-GB	Output beam tetrode (Class AB1 push-pull)	6.3	0.90	350 360	54.0 100.0	250 270	2.5 17.0	18.0	33.0	5.20	4.2 9.0	11.0 24.0	300 250	IO	36	1936
6L7, 6L7-G	VM heptode mixer	6.3	0.30	250	5.3	100	6.5	3.0	600.0	0.30⅄				IO+tc	2	1937
6M6-G	Output pentode	6.3	1.20	250	36.0	250	4.0	6.0		9.50	7.0	4.4	150	IO	36	1940
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6M7	RF pentode	6.3	0.30	250	10.5	125	2.8	2.5	900.0	3.40				IO+tc	8
6M8	Diode, triode & pentode	6.3	0.60	t100 p100	0.5 8.5	- 100	-	1.0 3.0	91.0	2MΩ				IO+tc	17
6M8-G 6M8-GT	Diode, triode & pentode	6.3	0.60	p100 t100	8.5 0.5	100		3.0 1.0	200.0 91.0	1.90 1.10				IO+tc	17
6N4	UHF triode	6.3	0.20	180	12.0	-	-	3.5	5.3	6.00				B7G	37
6N6-G	Triode & direct coupled output triode	6.3	0.80	t300 ot300	9.0 42.0	-	-	0 int. to k	24.0	2.40	7.0	4.0		IO	23	1936
6N7, 6N7-G, 6N7-GT	Double triode (Class B2 push-pull)	6.3	0.80	300	70.0	-	-	0	23.0	1.60	8.0	10.0		IO	22	1937
6P5-G, 6P5-GT	Medium-μ triode	6.3	0.30	250	5.0	-	-	13.5	9.5	1.45				IO	20
6P7-G	Triode & VM RF pentode	6.3	0.30	t100 p250	6.3 6.5	- 100	- 1.5	3.0 3.0	20.0 850.0	0.53 1.10				IO+tc	5	1938
6P8	Triode hexode FC	6.3	0.80	h250 t100	2.2 2.3	80	3.0	3.0	700.0	0.65⅄				IO+tc	4	1938
6Q6-GT	Single diode triode	6.3	0.15	250	1.2	-	-	3.0	61.0	1.05				IO+tc	30	1936
6Q7, 6Q7-G/-GT	Double diode triode	6.3	0.30	250	1.0	-	-	3.0	58.0	1.20				IO+tc	29	1936
6R6	RF pentode	6.3	0.3	250	7.0	100	1.7	3.0	-	1.45				IO+tc	12
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6R7, 6R7-G/-GT	Double diode triode	6.3	0.30	250	9.5	-	-	9.0	8.5	1.90				IO+tc	29	1936
6S4, 6S4-A	Medium-μ triode	6.3	0.60	250	24.0	-	-	8.0	3.7	4.50				B9A	7
6S6	VM RF pentode	6.3	0.45	250	13.0	100	3.0	2.0	350.0	4.00				IO+tc	13
6S7, 6S7-G	VM RF pentode	6.3	0.15	250	8.5	100	2.0	3.0	1MΩ	1.75				IO+tc	8	1936
6S8-GT	Triple diode triode	6.3	0.30	250	0.9	-	-	2.0	91.0	1.10				IO+tc	158
6SA7, 6SA7-G/-GT	Heptode mixer	6.3	0.30	250	3.5	100	8.5	0/25	1MΩ	0.45⅄				IO IO	6 7
6SB7-Y	Heptode mixer	6.3	0.30	250	3.8	100	10.0	1.0	1MΩ	0.95⅄				IO	6
6SC7	High-μ double triode	6.3	0.30	250	2.0	-	-	2.0	53.0	1.30				IO	25	1940s
6SD7-GT	VM RF pentode	6.3	0.30	250	6.0	100	1.9	2/11	1MΩ	3.60				IO	10	1940s
6SE7-GT	RF pentode	6.3	0.30	250	4.5	100	1.5	1.5	1.1MΩ	3.40				IO	10
6SF5, 6SF5-GT	High-μ triode	6.3	0.30	250	0.9	-	-	2.0	66.0	1.50				IO	21	1940s
6SF7, 6SF7-GT	Diode & VM RF pentode	6.3	0.30	250	12.4	100	3.3	1/35	700.0	2.05				IO	71
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6SG7	Semi-VM RF pentode	6.3	0.30	250	9.2	150	3.4	2.5	1MΩ	4.00				IO	14	1940s
6SH7	RF pentode	6.3	0.30	250	10.8	150	4.1	1.0	900.0	4.90				IO	14
6SJ7, 6SJ7-GT	RF pentode	6.3	0.30	250	3.0	100	0.8	3.0	1MΩ	1.60				IO	10	1940s
6SK7, 6SK7-GT	VM RF pentode	6.3	0.30	250	9.2	100	2.6	3.0	800.0	2.00				IO	10	1940s
6SL7-GT	High-μ double triode	6.3	0.30	250	2.3	-	-	2.0	44.0	1.60				IO	26	1940s
6SN7-GT, 6SN7-GTA, 6SN7-GTB	Medium-μ double triode	6.3	0.60	250	9.0	-	-	8.0	7.7	2.60				IO	26	1940s
6SQ7, 6SQ7-GT	Double diode triode	6.3	0.30	250	0.9	-	-	2.0	91.0	1.10				IO	31	1940s
6SR7	Double diode triode	6.3	0.30	250	9.5	-	-	9.0	8.5	1.90				IO	31	1940s
6SS7	VM RF pentode	6.3	0.15	250	9.0	100	2.0	3.0	1MΩ	1.85				IO	10	1940s
6ST7	Double diode triode	6.3	0.15	250	9.5	-	-	9.0	8.5	1.90				IO	31
6SU7 = 6SL7	High-μ double triode	6.3	0.30	250	2.3	-	-	2.0	44.0	1.60				IO	26
6SV7	Diode & pentode	6.3	0.30	250	7.5	150	2.8	1.0	800.0	3.40				IO	71
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6SZ7	Double diode triode	6.3	0.15	250	1.0	-	-	3.0	58.0	1.20				IO	31
6T6	RF pentode	6.3	0.45	250	10.0	100	2.0	1.0	1MΩ	5.50				IO+tc	9
6T7-G	Double diode triode	6.3	0.15	250	1.2	-	-	3.0	62.0	1.05				IO+tc	29	1937
6T8, 6T8-A	Triple diode triode	6.3	0.45	250	1.0	-	-	3.0	58.0	1.20				B9A	2
6U6-GT	Output pentode	6.3	0.75	250	56.0	135	3.0	14.0	20.0	6.20	3.0	5.5	240	IO	36	1940s
6U7-G	VM RF pentode	6.3	0.30	250	8.2	100	2.0	3.0	800.0	1.60				IO+tc	8	1937
6U8, 6U8-A	Triode pentode FC	6.3	0.45	mix250 osc150	5.2 5.7	100	1.9	0	400.0	1.90⅄				B9A	25
6V6, 6V6-G, 6V6-GT	Output beam tetrode (Class AB1 push-pull)	6.3	0.45	315 285	34.0 70/92	225 285	2.2 4/13.5	13.0 19.0	77.0 70.0	3.75 3.60	8.5 8.0	5.5 14.0	360	IO	36	1937
6V7-G	Double diode triode	6.3	0.30	250	8.0	-	-	20.0	7.5	1.10				IO+tc	29	1937
6W6-GT	Output beam tetrode	6.3	1.25	135	61.0	135	12.0	9.5		9.0	2.0	3.3	130	IO	36
6W7-G	RF pentode	6.3	0.15	250	2.0	100	0.5	3.0	150.0	1.23				IO+tc	8
6Y6-G	Output beam tetrode	6.3	1.25	200	66.0	135	9.0	14.0	18.3	7.10	2.6	6.0	186	IO	36	1938
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6Y7-G	Double output triode (Class B2 push-pull)	6.3	0.30	250	10.0	-	-	0			14.0	8.0		IO	22
6Z7-G	Double output triode (Class B2 push-pull)	6.3	0.30	180	60.0	-	-	0			12.0	4.2	0	IO	22	1938
7A4 = 6J5	Medium-μ triode	6.3	0.30	250	9.0	-	-	8.0	7.7	2.60				B8G	15	1940s
7A5	Output beam tetrode	6.3	0.76	125	45.0	135	9.5	9.0	17.0	6.00	2.7	2.2	165	B8G	10	1940s
7A6	Double diode	6.3	0.15	150	10.0	-	-	-	-	-				B8G	11	1940s
7A7	VM RF pentode	6.3	0.30	250	8.6	100	2.0	3.0	800.0	2.00				B8G	3	1940s
7A8	Octode FC	6.3	0.15	mix250 osc100	3.0 4.2	100	3.2	3.0	700.0	0.55⅄				B8G	9	1940s
7AB7	RF pentode	6.3	0.15	250	1.75	100	0.60	2.0	800.0	1.20				B8G	46
7AC7	RF pentode	6.3	0.45	300	10.0	150	2.50	2.0	1MΩ	9.00				B7G	16
7AD7	RF pentode	6.3	0.60	300	28.0	150	7.0	-	300.0	9.5				B8G	3
7AF7	Double triode	6.3	0.30	250	9.0	-	-	10.0	7.6	2.10				B8G	14
7AG7	RF pentode	6.3	0.15	250	6.0	250	2.0	2.0	750/0	4.20				B8G	3
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
7AH7	RF pentode	6.3	0.15	250	6.8	250	1.9	-	1MΩ	3.3				B8G	3
7B4 = 6S5	High-μ triode	6.3	0.30	250	0.9	-	-	2.0	66.0	1.50				B8G	15	1940s
7B5	Output pentode	6.3	0.40	315	28.0	250	9.0	21.0	75.0	2.10	9.0	4.5	570	B8G	10	1940s
7B6	Double diode triode	6.3	0.30	250	0.9	-	-	2.0	91.0	1.10				B8G	2	1940s
7B7	VM RF pentode	6.3	0.15	250	8.5	100	1.7	3.0	750.0	1.75				B8G	3	1940s
7B8	Heptode FC	6.3	0.30	mix250 osc100	3.5 4.0	100	2.7	3.0	360.0	0.55⅄				B8G	9	1940s
7C4	Single diode	6.3	0.15	150	8.0	-	-	-	-	-				B8G	23	1940s
7C5 = 6V6	Output beam tetrode	6.3	0.45	250	45.0	250	4.5	12.5	52.0	4.10	5.0	4.5		B8G	10	1940s
7C6	Double diode triode	6.3	0.15	250	1.3	-	-	1.0	100.0	1.00				B8G	2	1940s
7C7	RF pentode	6.3	0.15	250	2.0	100	0.5	3.0	2MΩ	1.30				B8G	3	1940s
7D7	Triode hexode FC	6.3	0.45	mix250 osc100	1.3 5.0	100	2.8	3.0	1.5MΩ	0.275⅄				B8G	8
7E5	UHF triode	6.3	0.15	180	5.5	-	-	3.0	12.0	3.0				B8G	45
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
7E6 = 6SR7-GT	Double diode triode	6.3	0.30	250	9.5	-	-	9.0	8.5	1.90				B8G	12	1940s
7E7	Double diode & VM RF pentode	6.3	0.30	250	7.5	100	1.6	3.0	700.0	1.30				B8G	13
7F7 = 6SL7-GT	High-μ double triode	6.3	0.30	250	2.3	-	-	2.0	44.0	1.60				B8G	14	1940s
7F8	Medium-m double triode	6.3	0.30	250	10.0	-	-	2.5	10.4	5.00				B8G	20
7G7/1232	RF pentode	6.3	0.45	250	6.0	100	2.0	2.0	800.0	4.50				B8G	3	1940s
7G8	Double beam tetrode	6.3	0.30	250	4.5	100	0.8	2.5	230.0	2.10				B8G	18
7H7	VM RF pentode	6.3	0.30	250	9.5	150	3.5	2.5	800.0	3.80				B8G	3	1940s
7J7	Triode heptode FC	6.3	0.15	h250 t100	1.3 5.4	100	2.9	3.0	1.5MΩ	0.3⅄				B8G	8	1940s
7K7	Double diode triode	6.3	0.30	250	2.3	-	-	2.0	44.0	1.60				B8G	21	1940s
7L7	RF pentode	6.3	0.30	250	4.5	100	1.5	1.5	100.0	3.10				B8G	3	1940s
7N7	Medium-m double triode	6.3	0.60	250	9.0	-	-	8.0	7.7	2.60				B8G	14	1940s
7Q5	Output beam tetrode	6.3	0.40	315	28.0	250	9.0	21.0	75.0	2.10	9.0	4.5	570	B8G	10
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
7Q7	Heptode FC	6.3	0.30	250	3.5	100	8.5	2.0	1MΩ	0.55⅄				B8G	37	1940s
7R7	Double diode & VM RF pentode	6.3	0.30	250	5.7	100	1.7	1.0	1MΩ	3.20				B8G	13	1940s
7S7	See Brimar													-	-
7T7	RF pentode	6.3	0.30	250	10.8	150	4.1	1.0	900.0	4.90				B8G	3
7V7	RF pentode	6.3	0.45	300	9.6	150	3.9	2.5	300.0	5.80				B8G	3
7W7	VM RF pentode	6.3	0.45	300	10.0	150	3.9	2.2	300.0	5.80				B8G	19
7X7	Double diode triode	6.3	0.30	250	1.9	-	-	1.0	67.0	1.50				B8G	22
10	Output triode (Class B push-pull)	7.5*	1.25	425 425	18.0 55.0	-	-	40.0 50.0	5.0	1.60	10.2 8.0	1.6 25.0	0	USM4	1	1937
11 12	General-purpose triode	1.1*	0.25	135	3.0			10.5	15.0	0.44				USM4b USM4	1 1
12A	AF triode	5.0*	0.25	180	7.7	-	-	13.5	5.0	1.80	10.6	0.28		USM4	1	1937
12A5	Output pentode	6.3	0.60*	180	48.0	180	14.0	25.0	35.0	2.40	3.3	3.4	400	USS7	7	1936
12A6	Output beam tetrode	12.6	0.15	250	30.0	250	3.5	12.5	70.0	3.00	7.5	3.4		IO	36	1940s
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
12A7	Output pentode & HW rectifier	12.6	0.30	p135 r125	9.0 30.0	135	2.5	13.5	100.0	0.98	13.5	0.55	1200	USS7+tc	3	1937
12A8-GT	Heptode FC	12.6	0.15	mix250 osc100	3.5 4.0	100	2.7	3.0	360.0	0.55⅄				IO+tc	1	1940s
12AD6	See Brimar													-	-
12AE6	See Brimar													-	-
12AH7-GT	Medium-μ double triode	12.6	0.15	180	7.6	-	-	6.5	8.4	1.90				IO	27	1940s
12AL5	Double diode	12.6	0.15	150	9.0	-	-	-	-	-				B7G	18
12AT6	Double diode triode	12.6	0.15	250	1.0	-	-	3.0	58.0	1.20				B7G	19
12AT7	High-5 double triode	12.6	0.15*	250	10.0	-	-	12.0	10.9	5.50				B9A	1
12AU6	RF pentode	12.6	0.15	250	10.6	150	4.3	6.5	1MΩ	5.20			68	B7G	16
12AV6	See Brimar													-	-
12AU7, 12AU7-A	Medium-5 double triode	12.6	0.15*	250	10.5	-	-	8.5	7.7	2.20				B9A	1
12AW6	RF pentode	12.6	0.15	250	7.0	150	2.2	1.8	800.0	5.00				B7G	14
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
12AW7	RF pentode	12.6	0.15	250	7.0	150	2.0	1.8	800.0	6.50				B7G	32
12AX7	High-5 double triode	12.6	0.15*	250	1.2	-	-	2.0	62.5	1.60				B9A	1
12AY7	Medium-μ double triode	12.6	0.15*	250	3.0	-	-	4/11	22.8	1.75				B9A	1
12AZ7	High-μ double triode	12.6	0.225*	250	10.0	-	-	12.0	10.9	5.50				B9A	1
12B6	Single diode triode	12.6	0.15	250	0.9			2.0	91.0	1.10				IO	30
12B7 = 14A7	VM RF pentode	12.6	0.30	250	9.2	100	2.6	3.0	800.0	2.00				B8G	3	1940s
12B8	Triode & RF pentode	12.6	0.30	t90 p90	2.8 7.0	- 90	- 2.0	0 3.0	37.0 200.0	2.4 1.8				IO+tc	16
12BA7	Heptode FC	12.6	0.15	250	3.8	100	10.0	1.0	1MΩ	0.95⅄				B9A	3
12BD6	RF pentode	12.6	0.15	250	9.	100	3.5	3.0	700.0	2.0				B7G	16
12BF6	Double diode triode	12.6	0.15	250	9.5	-	-	9.0	8.5	1.9				B7G	19
12BH7, 12BH7-A	See Brimar													-	-
12C8	Double diode & VM RF pentode	12.6	0.15	250	9.0	125	2.3	3.0	600.0	1.12				IO+tc	15	1940s
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
12E5-GT	Medium-μ triode	12.6	0.15	250	5.0			13.5	2.7	9.50				IO	20
12F5-GT	High-μ triode	12.6	0.15	250	0.9	-	-	2.0	66.0	1.50				IO+tc	18	1940s
12G7-G	Double diode triode	12.6	0.15	250	-	-	-	3.0	58.0	1.20				IO+tc	29
12H6	Double diode	12.6	0.30	150	8.0	-	-	-	-	-				IO	53	1940s
12J5-GT	Medium-μ triode	12.6	0.15	250	9.0	-	-	8.0	7.7	2.60				IO	20	1940s
12J7-GT	RF pentode	12.6	0.15	250	2.0	100	0.5	3.0	1.5MΩ	1.25				IO+tc	8	1940s
12K7-GT	VM RF pentode	12.6	0.15	250	10.5	125	2.6	3.0	600.0	1.65				IO+tc	8	1940s
12K8, 12K8-GT	Triode hexode FC	12.6	0.15	h250 t250	2.5 3.8	100	6.0	3.0	600.0	0.36⅄				IO+tc	4	1940s
12L6-GT	Output beam tetrode	12.6	0.60	200	50.0	110	2.0	8.0	30.0	9.5	3.0	4.3	160	IO	36
12L8-GT	Double output pentode	12.6	0.15	180	13.5	180	4.6	9.0	160.0	2.5	10.0	1.0		IO	41
12Q7-GT	Double diode triode	12.6	0.15	250	1.0	-	-	3.0	58.0	1.20				IO+tc	29	1940s
12S8-GT	Triple diode triode	6.3	0.30	250	0.90	-	-	2.0	91.0	1.10				IO+tc	158
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
12SA7 12SA7-GT	Heptode mixer	12.6	0.15	250	3.5	100	8.5	0	1MΩ	0.45⅄				IO IO	6 7	1940s
12SC7	High-μ double triode	12.6	0.15	250	2.0	-	-	2.0	53.0	1.30				IO	25	1940s
12SF5, 12SF5-GT	High-μ triode	12.6	0.15	250	0.9	-	-	2.0	66.0	1.50				IO	21	1940s
12SF7	Diode & VM RF pentode	12.6	0.15	250	12.4	100	3.3	1/35	700.0	2.05				IO	71
12SG7	VM RF pentode	12.6	0.15	250	9.2	150	3.4	2.5	1MΩ	4.00				IO	14	1940s
12SH7	RF pentode	12.6	0.15	250	10.8	150	4.1	1.5	900.0	4.90				IO	14	1940s
12SJ7, 12SJ7-GT	RF pentode	12.6	0.15	250	2.0	100	0.5	3.0	1.5M	1.25				IO	10	1940s
12SK7, 12SK7-GT	VM RF pentode	12.6	0.15	250	9.2	100	2.6	1.0	100.0	2.30				IO	10	1940s
12SL7-GT	High-μ double triode	12.6	0.15	250	2.3	-	-	2.0	44.0	1.60				IO	26	1940s
12SN7-GT	Medium-μ double triode	12.6	0.30	250	9.0	-	-	8.0	7.7	2.60				IO	26	1940s
12SQ7, 12SQ7-GT	Double diode triode	12.6	0.15	250	0.9	-	-	2.0	91.0	1.10				IO	31	1940s
12SR7, 12SR7-GT	Double diode triode	12.6	0.15	250	9.5	-	-	9.0	8.5	1.90				IO	31	1940s
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
12SW7	Double diode triode	12.6	0.15	250	9.5	-	-	9.0	8.5	1.90				IO	31
12SX7	Double triode	12.6	0.30	250	9.0	-	-	8.0	7.7	2.60				IO	26
12SY7	Heptode mixer	12.6	0.15	250	3.5	100	8.5	2.0	1MΩ	0.45⅄				IO	6
12V6-GT	Output beam tetrode	12.6	0.225	315	34.0	225	2.2	13	80.0	3.75	8.0	5.5		IO	36
14A4	Medium-μ triode
14A5	Output beam tetrode	12.6	0.15	250	30.0	250	3.5	12.5	70.0	3.00	7.0	2.8	375	B8G	10
14A7/12B7	VM RF pentode	12.6	0.15	250	9.2	100	3.6	3.0	800.0	2.00				B8G	3	1940s
14AF7	Medium-μ double triode	12.6	0.15	250	9.0	-	-	10.0	7.6	2.10				BRG	14
14B6	Double diode triode	12.6	0.15	250	0.9	-	-	2.0	110.0	0.90				B8G	2	1940s
14B8	Heptode FC	12.6	0.15	mix250 osc100	3.5 4.0	100	2.7	3.0	360.0	0.55⅄				B8G	9
14C5 = 6V6	Output beam tetrode (Class AB1 push-pull)	12.6	0.22	315 285	35.0 92.0	225 285	6.0 13.5	13.0 19.0	77.0	3.75	8.5 8.0	5.5 14.0	315 250	B8G	10
14C7	RF pentode	12.6	0.15	250	2.2	100	0.70	3.0	1MΩ	1.58				B8G	3
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
14E6	Double diode triode	12.6	0.15	250	9.5	-	-	9.0	8.5	1.90				B8G	12
14E7	Double diode & VM RF pentode	12.6	0.15	250	7.5	100	1.6	3.0	700.0	1.30				B8G	13
14F7	High-μ double triode	12.6	0.15	250	2.3	-	-	2.0	44.0	1.60				B8G	14
14F8	Medium-μ double triode	12.6	0.15	250	10.0	-	-	2.5	10.4	5.00				B8G	20
14H7	VM RF pentode	12.6	0.15	250	9.5	150	3.5	2.5	800.0	4.20				B8G	3	1940s
14J7	Triode heptode FC	12.6	0.15	mix250 osc100	1.3 5.4	100	2.9	3.0	1.5MΩ	0.3⅄				B8G	8
14R7	Double diode & VM RF pentode	12.6	0.15	250	6.2	100	1.6	1.0	1MΩ	3.40				B8G	13	1940s
14S7	Triode heptode FC	12.6	0.15	mix250 osc250	1.8 5.0	100	3.0	2.0	1.25M	0.53⅄				B8G	8	1940s
14V7	RF pentode	12.6	0.22	300	9.6	150	3.9	2.0	300.0	5.8				B8G	3
14W7	RF pentode	12.6	0.22	300	10.0	150	3.9	2.2	300.0	5.8				B8G	19
15	RF pentode (IH)	2.0	0.22	135	1.8	67.5	0.3	1.5	800.0	0.75				USS5+tc	2	1937
18	Output pentode	14.0	0.30	250	34.0	250	6.5	16.5	80.0	2.35	7.0	3.5		USM6	8	1937
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
19 = 1J6-G	Class B double triode	2.0*	0.26	135	10/27	-	-	0			10.0	2.1		USS6	7	1936
19J6	Medium-5 double triode	18.9	0.15	100	0.85			8.5	7.1	5.30				B7G	16
19T8	Triple diode triode	19.0	0.15	250	1.0	-	-	3.0	58.0	1.20				B9A	2
20	Output triode	3.3*	0.132	135	6.5	-	-	22.5	6.3	0.52	6.5	0.11		USS4	1	1937
20C6	Double diode triode	26.5	70mA	250	9.5	-	-	9.0	8.5	1.90				B7G	19
20J8	Triode heptode FC	20.0	0.15	mix250 osc100	1.5 1.5	100	3.4	3.0 1.5	2.5MΩ	0.29⅄				IO+tc	3
22	RF tetrode	3.3*	0.132	135	3.7	67.5	1.3	1.5	325.0	0.50				USM4+tc	2	1936
21A7	Triode hexode FC	21.0	0.16	mix250 osc150	1.3 3.5	100	2.8	3.0 3.0	17.0	0.27⅄ 1.90				BB8G	8
24A, 24S	RF tetrode	2.5	1.75	250	4.0	90	1.7	3.0	600.0	1.00				USM5+tc	2	1936
25A6, 25A6-G 25A6-GT	Output pentode	25.0	0.30	160	33.0	120	12.0	18.0	42.0	2.40	5.0	2.2	450	IO	36	1936
25A7-G 25A7-GT	Output pentode & rectifier	25.0	0.30	p100 r125	20.5 75.0	100	4.0	15.0	50.0	1.80	4.5	0.77	615	IO	99	1937
25AC5-G 25AC5-GT	High-μ output triode (Class B push-pull)	25.0	0.30	180	4.0	-	-	0	15.2	3.8	4.8	6.0	0	IO	20
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
25B5	Direct coupled power amplifier	25.0	0.30	ot180 t100	46.0 5.8	-	-	0 0	15.0	2.30	4.0	3.8	-	USM6	5	1937
25B6-G	Output pentode	25.0	0.30	200	71.0	135	13.0	23.0	18.0	5.00	2.5	7.1	325	IO	36	1936
25B8-GT	Triode & VM RF pentode	25.0	0.15	t100 p100	0.6 7.6	- 100	-	1.0 3.0	75.0 180.0	1.5 2.0				IO+tc	16
25C6-G	Output beam tetrode	25.0	0.30	200	66.0	135	9.0	14.0	18.3	7.1	2.6	6.0	186	IO	36
25D8	Diode, triode & RF pentode	25.0	0.15	t100 p100	0.5 8.5	- 100	- 2.7	1.0 3.0	91.0 200.0	1.1 1.9				IO+tc	17
25L6, 25L6-GT	Output beam tetrode	25.0	0.30	200	50.0	110	2.0	8.0	30.0	9.50	3.0	4.3		IO	36	1937
25N6-G	See 25B5													IO	23	1937
25SN7-GT	Medium-μ double triode	25.0	0.15	250	9.0	-	-	8.0	7.7	2.60			110	IO	26	1940s
26	Low-μ triode	1.5*	1.05	180	6.2	-	-	14.5	7.3	1.15				USM4	1	1937
26A6	VM RF pentode	26.5	70mA	250	10.5	100	4.0	1.8	1MΩ	4.0				B7G	15
26A7	Double beam tetrode	26.5	0.6	26.5	20.0	26.5	2.0	4.5	2.50	5.5	1.5	0.2		IO	41
26D6	Heptode mixer	26.5	70mA	250	3.0	100	7.8	1.5	1MΩ	0.47⅄				B7G	29
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
27, 27S	Low-μ triode	2.5	1.75	250	5.2	-	-	21.0	9.0	1.00			4000	USS5	1	1936
28D7	Double beam tetrode	28.0	0.40	28	9.0	28	0.7	-			4.0	80mW		B8G	38
30	Low-μ triode	2.0*	0.06	135	3.0	-	-	9.0	10.3	0.90				USS4	1	1936
31	Output triode	2.0*	0.13	180	12.3	-	-	30.0	3.6	1.05	5.7	0.37		USS4	1	1936
32	RF tetrode	2.0*	0.06	135	1.7	67.5	0.4	3.0	1MΩ	0.60				USM4+tc	2	1936
32L7-GT	Output beam tetrode and rectifier	32.5	0.30	bt 90 r125	27.0 60.0	90	2.0	7.0	17.0	4.80	2.6	1.0	2400	IO	99
33	Output pentode	2.0*	0.26	180	22.0	180	5.0	18.0	55.0	1.70	6.0	1.4		USM5	3	1936
34	VM RF pentode	2.0*	0.06	67.5	2.7	67.5	1.1	3.0	600.0	0.60				USM4+tc	2	1936
35/51, 35S/51S	VM RF tetrode	2.5	1.75	250	6.5	90	2.5	3.0	400.0	1.05			330	USM5+tc	2	1936
35B5	Output beam tetrode	35.0	0.15	110	41.0	110	7.0	7.5		5.8	2.5	1.5	185	B7G	27
35C5	Output beam tetrode	35.0	0.15	110	41.0	110	7.0	7.5		5.8	2.5	1.5	185	B7G	42
35L6-GT	Output beam tetrode	35.0	0.15	200	41.0	110	2.0	8.0	40.0	5.90	4.5	3.3		IO	36	1938
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
36	RF tetrode	6.3	0.30	250	3.2	90	1.7	3.0	550.0	1.10				USM4+tc	2	1936
37	Low-μ triode	6.3	0.30	250	7.5	-	-	18.0	8.4	1.10				USS5	1	1936
38	Output pentode	6.3	0.30	250	22.0	250	3.8	25.0	100.0	1.20	10.0	2.5		USM5+tc	2	1936
39/44	VM RF pentode	6.3	0.30	250	5.8	90	1.4	3.0	1M	1.10				USM5+tc	2	1936
40	Medium-μ triode	5.0*	0.25	180	0.2	-	-	3.0	150.0	0.20				USM4	1
41	Output pentode	6.3	0.40	315	22.5	285	4.0	21.0	75.0	2.10	9.0	4.5		USS6	8	1936
42	Output pentode	6.3	0.70	250	34.0	250	6.5	16.5	80.0	2.50	7.0	3.5		USM6	8	1936
43 = 25A6	Output pentode	25.0	0.30	160	33.0	120	6.5	18.0	42.0	2.20	5.0	2.2		USM6	8	1936
45	Output triode	2.5*	1.50	250	36.0	-	-	56.0	17.0	2.05	4.6	2.0	1600	USM4	1	1936
46	Output tetrode (triode) (Class B push-pull)	2.5*	1.55	250 400	22.0	Connected to anode		33.0 0	2.4	2.35	6.4 5.8	1.25 20.0	1500 0	USS5	3	1936
47	Output pentode	2.5*	1.75	250	31.0	250	6.0	16.5	60.0	2.50	7.0	2.7	445	USM5	3	1936
48	Output tetrode	30.0	0.40	125	56.0	100	9.5	20.0		3.90	1.5	2.5	310	USM6	8	1936
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
49	Output tetrode (triode connected)	2.0*	0.12	135	6.0	Connected to anode		20.0	4.2	1.12	11.0	0.17	3330	USM5	3	1936
50	Output triode	7.5*	1.25	450	55.0	-	-	84.0	1.5	2.1	4.3	4.6	1500	USM4b	1	1937
50A5	Output beam tetrode	50.0	0.15	200	50.0	110	1.5	8.0	35.0	8.25	3.0	4.7	155	B8G	10
50B5	Output beam tetrode	50.0	0.15	110	49.0	110	4.0	7.5	14.0	7.5	2.5	1.9	140	B7G	27
50C5	Output beam tetrode	50.0	0.15	110	49.0	110	4.0	7.5	10.0	7.5	2.5	1.9	140	B7G	42
50C6-G	Output beam tetrode	50.0	0.15	135	58.0	135	3.5	13.5	9.3	7.00	2.0	3.6	220	IO	36
50L6-GT	Output beam tetrode	50.0	0.15	200	50.0	110	2.0	8.0	30.0	9.50	3.0	4.3	160	IO	36	1940s
51	See 35													USS5+tc	2
53 = 6A6/6N7	Class B double triode	2.5	2.00	300	70.0	-	-	0			8.0	10.0		USM7	5	1936
55, 55S = 85/S	Double diode triode	2.5	1.00	250	8.0	-	-	20.0	7.5	1.10			2500	USS6+tc	4	1936
56, 56S	Medium-μ triode	2.5	1.00	250	5.0	-	-	13.5	9.5	1.45				USS5	1	1937
57 = 6J7	RF pentode	2.5	1.00	250	2.0	100	0.5	3.0	1.5M	1.25				USS6+tc	2	1936
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
58 = 6U7	VM RF pentode	2.5	1.00	250	8.2	100	2.0	3.0	800.0	1.60				USS6+tc	2	1936
59	Triple grid power output	2.5	2.00	250	35.0	250	9.0	18.0	40.0	2.5	6.0	3.0	410	USM7	6	1936
70A7	Output beam tetrode & rectifier	70.0	0.15	110	40.0	110	3.0	7.5		5.8	2.5	1.5	175	IO	105
70L7-GT	Output beam tetrode and rectifier	70.0	0.15	bt110 r110	40.0 70.0	110	3.0	7.5	15.0	7.50	2.0	1.8	175	IO	43
71A	Output triode	5.0*	0.25	180	20.0	-	-	40.5	1.7	1.70	4.8	0.8	2025	USM4b	1	1937
75, 75S = 6SQ7	Double diode triode	6.3	0.30	250	0.9	-	-	2.0	91.0	1.10				USS6+tc	4	1936
76 = 6P5-G/-GT	Medium-μ triode	6.3	0.30	250	5.0	-	-	13.5	9.5	1.45				USS5	1	1936
77	RF pentode	6.3	0.30	250	2.3	100	0.5	3.0	1.5M	1.25				USS6+tc	2	1936
78	VM RF pentode	6.3	0.30	250	10.5	125	2.6	3.0	600.0	1.65				USS6+tc	2	1936
79 = 6Y7-G	Class B double triode	6.3	0.60	250	10.6	-	-				14.0	8.0		USS6+tc	6	1936
85	Double diode triode	6.3	0.30	250	8.0	-	-	20.0	7.5	1.10				USS6+tc	4	1936
89	Triple grid power output	6.3	0.40	250	32.0	250	5.5	25.0	70.0	1.80	6.75	3.4	600	USS6+tc	2	1936
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
112-A	Detector or AF triode	5.0*	0.25	180	7.7	-	-	13.5	4.7	1.80	10.6	0.28	4700	USS4	1	1937
117L7-GT, 117M7-GT	Output beam tetrode & rectifier	117.0	0.09	bt105 r117	43.0 75.0	105	4.0	5.2	17.0	5.30	4.0	0.85	110	IO	44	1940s
117N7-GT	Output beam tetrode & rectifier	117.0	0.09	bt100 r117	51.0 75.0	100	5.0	6.0	16.0	7.00	3.0	1.2	110	IO	45	1940s
117P7-GT	Output beam tetrode & rectifier	117.0	0.09	bt105 r117	43.0 75.0	105	5.5	5.2	17.0	5.30	4.0	0.85	110	IO	45	1940s
183/483	Output triode	5.0*	1.25	250	30.0	-	-	60.0		1.70	5.0	1.8	1750	USS4	1	1937
300B	Output triode	5.0*	1.20	300	60.0	-	-		700Ω	5.4	6.0			USM4	1	1938
485	Detector or AF triode	3.0	1.25	180	9.0	-	-	9.0	8.9	1.40				USS5	1
615	UHF triode	6.3	0.175	250	11.0	-	-	6.0	9.0	2.20			545	IO+2tc	107	1940s
717A	Pentode	6.3	0.175	120	7.5	120	2.5	2.0	390.0	4.00			200	IO	150	1940s
807	Beam power tetrode (Class AB1 push-pull) (Class AB2 push-pull)	6.3	0.90	500 600 750	50.0 145.0 240.0	200 300 300	1.6 10.0 10.0	14.5 30.0 32.0	39.0	5.70	6.0 12.0 7.0	11.5 65.0 120.0	280 - -	USM5+tc	6	1940s
841	Output triode	7.5*	1.25	425	120.0	-	-	5.0			7.0	28.0		USM4	1	1940s
842	Output triode	7.5*	1.25	400	25.0	-	-	100.0	2.0	1.25	7.8	3.2		USM4	1	1940s
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
864	General-purpose triode	1.1*	0.25	90	2.9	-	-	4.5	13.5	0.61				USS4	1
950	Output pentode	2.0*	0.12	135	7.0	135	2.0	16.5	100.0	1.00	13.5	0.45	-	USS5	3	1937
954	Acorn UHF pentode	6.3	0.15	250	2.0	100	0.70	3.0	1M	1.40			1110	7AA	1	1940s
955	Acorn UHF triode	6.3	0.15	250	6.3	-	-	7.0	11.4	2.20			1110	5AA	1	1940s
956	UHF VM pentode	6.3	0.15	250	6.7	100	2.7	3.0	700.0	1.80			325	7AA	1	1940s
957	UHF triode	1.25*	0.05	135	2.0	-	-	5.0	20.8	0.65				5AA	1	1940s
958	UHF triode	1.25*	0.10	135	3.0	-	-	7.5	10.0	1.20				5AA	1	1940s
1201A	See 7E5													B8G	45
1203, 1203A	See 7C4													B8G	23	1940s
1291	See 3B7													IO	154	1940s
1294	See 1R4													B8G	23	1940s
1299	See 3D6													IO	151	1940s
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
1619	Output pentode	2.5	2.00	300	45.0	250	5.0	10.0		4.50	8.8	3.0		IO	36	1940s
1624	Output pentode (Class AB1 push-pull)	2.5	2.0	580	20.0	300	12.0	25.0			7.5	70.0		IO	36	1940s
1626	Output triode	12.6	0.25	250	25.0	-	-	32.0	2.38	2.10		5.0		IO	20	1940s
1630	Hexode	6.3	0.30	415	13.2	110								None	-	1940s
1852	See 6AC7													IO	10
1853	See 6AB7													IO	10
2101	Output pentode	2.0*	0.12	135	8.0	135	2.6	4.5	200.0	1.70	16.0	0.45	-	USS5	3	1940
2102	Double diode triode	2.0*	0.12	135	2.1	-	-	1.5	23.0	1.30				USS6	3	1940
2103	Double output pentode (Class A push-pull)	2.0*	0.26	135	4.0	135	1.2	7.5		1.60	24.0	0.6		USS7	8	1940
2151	Output pentode	14.0	0.30	250	48.0	250	11.6	30.0	50.0	2.30	5.0	5.0	-	USS6	8	1940
5881	Output beam tetrode	6.3	0.90	350	53.0	250		5.5	48.0	5.2	4.2	11.3		IO	36
6973	Output beam tetrode	6.3	0.45	250	46.0	250	3.5	15.0	73.0	4.8				B9A	95
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
9002	UHF triode	6.3	0.15	250	6.3	-	-	7.0	11.4	2.20				B7G	88	1940s
9003 ( 956)	UHF VM pentode	6.3	0.15	250	6.7	100	2.7	3.0	700.0	1.80				B7G	86	1940s
V99 X99	Detector or AF triode	3.3*	63mA	90	2.5	-	-	4.5	15.5	0.43				USM4 USM4	7 1

Rectifiers
Type	Class	Cathode			Va	DC Ia	PIV	DC Vo	Base		Year
		Type	Volts	Amps	Max RMS	mA	Volts	Volts	Type	Ref	Year
US
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
1B3	EHT	DH	1.2	0.20		2	40kV		IO+tc	58
1-V	HW	IH	6.3	0.30	350	50			USM4	5	1936
1V2	HW	DH	0.625	0.30		0.5	8250		B9A	5
1Z2	EHT	DH	1.50	0.30	7800	2.0			B7G+t	10
2B25	EHT	DH	1.40	0.11	1000	1.5			B7G	12
2W3	HW	DH	2.5	1.50	350	55			IO	59
2V3	EHT	DH	2.5	5.00		2	16.5kV		IO+tc	58
2X2	EHT	IH	2.5	1.75	4500	5.0			USM4+tc	8	1940s
2Y2	EHT	DH	2.5	1.75	4500	5.0			USM4+tc	8
2Z2	HW	DH	2.5	1.50	350	50			USM4	4
3B24	HW	DH	5.0	3.00*		30	20kV		USM4b+tc	13
3B25	HW	DH	2.5	5.00		500	4500		USM4+tc	9
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
3B26	EHT	DH	2.5	4.75		26	15kV		IO+tc	58
3B27	HW	IH	2.5	5.00	3000	250			USM4+tc	17
5AZ4	FW	DH	5.0	2.00	500	125			B8G	67
5T4	FW	DH	5.0	3.00	450	225	1250		IO	60	1938
5U4-G, 5U4-GB	FW	DH	5.0	3.00	450	225	1400		IO	60	1938
5V4-G, 5V4-GA	FW	IH	5.0	2.00	375	175	1100		IO	62	1937
5W4, 5W4-GT/G	FW	DH	5.0	1.50	350	100			IO	60	1936
5X3	EHT/FW	DH	5.0	2.00	1275	30			USM4+tc	3
5X4G	FW	DH	5.0	3.00	500	250	1400		IO	61	1937
5Y3-G, 5Y3-GT	FW	DH	5.0	2.00	500	125	1400		IO	60	1936
5Y4-G	FW	DH	5.0	2.00	350	125	1400		IO	61	1937
5Z3	FW	DH	5.0	3.00	500	250			USM4	3	1936
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
5Z4	FW	IH	5.0	2.00	400	125	1100		IO	62	1936
6AX5	FW	IH	6.3	1.20	450	40			IO	54
6W4-GT	HW	IH	6.	1.20		125	3500		IO	109
6W5-G	FW	IH	6.3	0.90	350	100			IO	54	1938
6X5, 6X5-GT	FW	IH	6.3	0.60	350	75			IO	54	1936
6Y3	EHT	IH	6.3	0.70	5000	7.5			IO+tc	102
6Y5	FW	IH	6.3	0.80	350	50			USM6	12	1937
6Z3	HW	IH	6.3	0.30	350	50			USM4	3
6Z4	FW	IH	6.3	0.50	350	60			USM5	5	1937
6Z5	FW	IH	6.3	0.80*	230	60			USM6	13	1937
6ZY5-G	FW	IH	6.3	0.30	325	40			IO	54	1938
7Y4	FW	IH	6.3	0.50	350	60			B8G	1	1940s
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
12Y4	FW	IH	12.6	0.30	325	70			B8G	1
12Z3	HW	IH	12.6	0.30	250	60			USM4	5	1936
12Z5	FW	IH	6.3	0.60*	225	60			USM7	10	1937
14Z3	HW	IH	12.6	0.30	250	60			USM4	5
25W4	HW	IH	25.0	0.30	350	125			IO	109
25X6	VD	IH	25.0	0.15	125	60			IO	53
25Y4	HW	IH	25.0	0.15	250	75			IO	55
25Y5-G	2xHW	IH	25.0	0.30	2 x 235	75			USM6	9	1937
25Z3	HW	IH	25.0	0.30	250	50			USM4	5
25Z4	HW	IH	25.0	0.30	250	100			IO	111
25Z5	2xHW	IH	25.0	0.30	2 x 235	75			USM6	9	1936
25Z6, 25Z6-GY	2xHW	IH	25.0	0.30	125	85			IO	53	1936
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
28Z5	FW	IH	28.5	0.24	325	100			B8G	1
35Y4	HW	IH	35.0	0.15	235	100			IO	50
35Z3	HW	IH	35.0	0.15	250	100			B8G	16	1940s
35Z4-GT	HW	IH	35.0	0.15	235	100			IO	55
35Z5-GT	HW	IH	35.0	0.15*	235	100			IO	51
35Z6-G	2xHW	IH	35.0	0.30	125	100			IO	53
40Z5	HW	IH	40.0	0.15	125	100			IO	51
45Z3	HW	IH	45.0	75Ma	117	65			B7G	20
45Z5-GT	HW	IH	45.0	0.15	235	60			IO	51
50X6	VD	IH	50.0	0.15	117	75			B8G	11
50Y6-GT	2xHW	IH	50.0	0.15	2 x 117	75			IO	53
50Y7	FW	IH	50.0	0.15	2 x 117	65			B8G	49
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
50Z6	VD	IH	50.0	0.30	125	150			IO	53
50Z7	VD	IH	50.0	0.15	117	65			IO	52
80	FW	DH	5.0	2.00	400	110			USM4	3	1936
81	HW	DH	7.5	1.25	700	85			USM4	4	1936
82	FW/MV	DH	2.5	3.00	500	125			USM4	3	1936
83	FW/MV	DH	5.0	3.00	500	250			USM4	3	1936
83-V	FW	IH	5.0	2.00	400	200			USM4	22	1936
84/6Z4	FW	IH	6.3	0.50	350	50			USM5	5	1936
117Z3	HW	IH	117.0	40mA	117	90			B7G	35
117Z4	HW	IH	117.0	40mA	117	90			IO	55
117Z6-GT	2xHW	IH	117.0	0.075	2 x 235	120			IO	53
816	HW/MV	DH	2.5	2.00	7000	125			USS4+tc	9	1940s
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
0Y4	HW	Gas			95	75	300		IO	61
0Z4	FW	Gas			300	75			IO	57	1938

Tuning Indicators
Type	Heater		Anode		Target		-Vg1	Shadow	Base		Year
	Volts	Amps	Volts	mA	Volts	mA	max/min	angle x°	Type	Ref	Year
US
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
2E5	2.5	0.80	250		250		4.0		USM6	11	1937
2G5	2.5	0.80	250	0.24	250	4.0	8/0	0/90	USM6	11	1937
6AB5 / 6N5	6.3	0.15	135	0.13	135	1.9	15.5/0	0/90	USM6	11
6AD6-G (Dual sensitivity)	6.3	0.15	75/-50	3/1.2	150	3.0		0/135	IO	46
6AF6-G	6.3	0.15	160		250	2.2		0/95	IO	100
6AF7-G	6.3	0.30	200	0	200	2.5	4.5/0		IO	48
6AL7	6.3	0.15	0		315		6/0		IO	101
6E5	6.3	0.30	250	0.2	250	2.0	7.5/0	0/90	USM6	11	1937
6G5 = 6H5 = 6U5	6.3	0.30	250	0.24	250	4.0	22/0	0/90	USM6	11	1937
6N5, 6AB5 / 6N5	6.3	0.15	135	0.13	135	1.9	15.5/0	0/90	USM6	11	1937
6T5	6.3	0.30	250	0.24	250	4.0	12/0	0/90	USM6	11
6X6	6.3	0.30	250	0.20	250	2.0	8/0	0/90	IO	46
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
1629	12.6	0.15	250	0.24	250	4.0	8/0		IO	46

Thyratrons
Type	Heater		Anode		Control	fmax	Gas	Base		Year
	Volts	Amps	Pk Volts	Pk mA	Ratio	KHz		Type	Ref	Year
US
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
2A4-G	2.5*	2.50	200	1250				IO	81
2B4	2.5*	1.40	300	300				USM5	1
6Q5	6.3	0.60	300	300				IO	20
629	2.5*	2.60	350	200				USM5	1
884	6.3	0.60	300	300				IO	20
885	2.5*	1.40	300	300				USM5	1

Voltage Stabilisers
Type	AV Stab	Striking	Current mA		Regulation	Base
	Volts	Voltage	Min	Max	Volts	Type	Ref
US
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
OA2 0A2	150	155	5	30	-	B7G	28
OA3 0A3	75	105	5	40	-	IO	74
OB2 0B2	108	133	3	30	-	B7G	28
OB3 0B3	90	125	5	40	-	IO	74
OC3 0C3	105	135	5	40	2.0	IO	74
OD3 0D3	150	185	5	40	4.0	IO	74
1B47	82	225	1	2	-	B7G	28
1C21	-	180	-	0.1	-	IO	108

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rvd-095

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Radio Valve Data: 1915-1960

Keith R Thrower OBE, The Valve Museum, April, 2022.

Extras ▼

Help information: Abbreviations - Explanations - Notes.

Post-1925 amplifying valves, frequency changersand signal diodes

Type

Description

Filament

Anode

Auxillary Grid

Grid

ra

gm/go

RL

Po

Rk

Base (1)Pin-out details for non-exhibits can be found with the base details.

Year

Volts

Amps

Volts

mA

Volts

mA

-V

kΩ

mA/V

kΩ

Watts

Ω

Type

Ref

US (American Type designations)

Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless

00-A

Triode

5.0*

0.25

90

2.5

-

-

4.5

11.0

0.73

USM4b

1

1937

01-A

Triode

5.0*

0.25

90

3.2

-

-

4.5

9.4

0.85

USM4b

1

1937

1A4-P = 1D51A4-T

VM RF pentodeVM RF tetrode

2.0*

60mA

135

2.2

67.5

0.9

3.0

1MΩ

0.65

USS4+tc

2

1936

1A5-G, 1A5-GT

Output pentode

1.4*

Post-1925 amplifying valves, frequency changers
and signal diodes

r_a

g_m/g_o

R_L

P_o

R_k

Base^{(1)Pin-out details for non-exhibits can be found with the base details.}

1A4-P = 1D5
1A4-T

VM RF pentode
VM RF tetrode

mix135
osc135

1.8
2.0

mix90
osc90

0.55
1.2