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List of Valves by Designation with Equivalent Types

W1

1924

B4	1	2	3	4
	a	g1	f	f

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm	μ
	1.8	0.3	120	-3.0	-	19,000	0.38	7.2

 
 

W101

Pentode

W107

Pentode

W118

B8A	1	2	3	4	5	6	7	8
	h	a	s	g3	g2	g1	k	h

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	13.0	0.1	175	100	-2.5	7.0	2.0	1M	2.3

 
W145 10F9

W119

Pentode

10F18 13EC7

W142

B8A	1	2	3	4	5	6	7	8
	h	a	ic	ic	g2	g1	k	h

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	12.6	0.1	170	100	-2.5	6.0	1.75	0.9M	2.3

 
12AC5 UF41

W143

B8B	1	2	3	4	5	6	7	8
	g3	s	g2	g1	a	k	h	h

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	100	-2.5	6	1.7	1.2M	2.0

 
7B7 7H7 CV0303 EF22 W148

W145

B8A	1	2	3	4	5	6	7	8
	h	a	s	g3	g2	g1	k	h

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	13.0	0.1	175	100	-2.5	7.0	2.0	1M	2.3

 
W118 10F9

W148

B8B	1	2	3	4	5	6	7	8
	h	a	g2	g3	s	g1	k	h

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	150	-2.5	9.5	3.5	0.8M	3.8

 
7H7 W81

W149

B8B	1	2	3	4	5	6	7	8
	h	a	g2	g3	s	g1	k	h

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.15	250	100	-3	8.5	1.7	0.75M	1.75

 
7B7

W150

B8A	1	2	3	4	5	6	7	8
	h	a	ic	ic	g2	g1	k,g3	h

 
Pentode

Pentode	Vh	Ah	Va	mAa	mAs	gm
	6.3	0.2	250	6.0	1.7	2.2

 
6CJ5 EF41

W17

1949

B7G	1	2	3	4	5	6	7
	f-	a	g2	ic	f-	g1	f+

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	1.4	0.05	90	67.5	0	3.5	1.5	0.5M	0.9

 
1F3 1T4 CV0785 DF91

W21

1937

B4	1	2	3	4	tc
	g2	f	g1	f	a

 
Pentode

Triode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	2.0	0.18	150	90	0	2.5	0.5	1.4

 
210VPT CV0171 CV3804

W21Met

1937

B4	1	2	3	4	tc
	g2	g1	f	f	a

 
Pentode

Triode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	2.0	0.18	150	90	0	2.5	0.5	1.4

 
VS2 VP210 210VPA 210VPT VP2 PM12M VS210

W25

B7G	1	2	3	4	5	6	7
	f-,g3	a	g2	ic	f-,g3	g1	f+

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	1.4	0.025	85	64	0	1.65	0.55	1M	0.85

 
1AJ4 1F1 DF96

W3

1925

B4	1	2	3	4
	a	g1	f	f

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm	μ
	1.8	0.5	150	-4.5	-	12,000	0.62	8

 
 

W30

1934

B7	1	2	3	4	5	6	7	tc
	m	g1	g3	h	h	k	g2	a

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	13.0	0.3	250	250	-1	12	6	1M	4

 
VPTS W31

W30K

1934

Pentode

CV3805

W31

1935

Pentode

CV3806 CV3807

W42

1936

Pentode

CV1183 NR61

W42M

B7	1	2	3	4	5	6	7	tc
	m	a	g3	h	h	k	g2	g1

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	4.0	0.65	250	250	-3	11.5	4.25	-	2.0

 
AC/VP2 VP4B MVSPen/B A50P

W61

IO	1	2	3	4	5	6	7	8
	m	h	a	g2	g3	-	h	k

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	80	-3	8.5	2.8	0.6M	2.9

 
 

W61M

Pentode

W63

1937

IO	1	2	3	4	5	6	7	8
	m	h	a	g2	g3	nc	h	k

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	125	-3	10.5	2.6	0.6M	1.65

 
6K7G KTW63

W719

B9A	1	2	3	4	5	6	7	8	9
	k	g1	k	h	h	s	a	g2	g3

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	100	-2.0	10.0	2.5	0.5M	6.0

 
6F26 7BY7 EF85

W727

B7G	1	2	3	4	5	6	7
	g1	g3	h	h	a	g2	k

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	100	-1.0	11.0	4.2	1.5M	4.4

 
6BA6 CV0454 EF93

W729

Pentode

W739

B9A	1	2	3	4	5	6	7	8	9
	k	g1	k	h	h	s	a	g2	g3

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	μ
	6.3	0.2	175	100	-1.3	12.0	3.5	0.22M	4.4

 
6F18 6EC7

W76

1945

IO	1	2	3	4	5	6	7	8
	m	h	a	g2	g3	nc	h	k

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	13.0	0.16	175	100	-3	8.5	1.7	0.5M	1.5

 
12K7GT KTW74M

W77

B7G	1	2	3	4	5	6	7
	g1	k	h	h	a	g3	g2

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	150	-0.65	8	2	0.5M	2.5

 
6CQ6 9D6 CV0131 EF92 V884

W81

1947

B8B	1	2	3	4	5	6	7	8
	h	a	g2	g3	s	g1	k	h

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	100	-3.6	10	3.2	0.8M	2.8

 
7H7 W148 W143

WD119

B9A	1	2	3	4	5	6	7	8	9
	g2	g1	k,s	h	h	a	a(d1)	a(d2)	g3

 
Double Diode Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	μ
	19	0.1	200	100	-0	11.0	3.3	0.3M	3.5	20

 
10FD12 19FL8 UBF89

WD142

1948

B8A	1	2	3	4	5	6	7	8
	h	a	a(d)	g3	g2	g1	k	h

 
Diode Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	12.6	0.1	200	115	-2.4	6.0	1.9	1.3M	1.9

 
UAF42

WD30

1935

Double Diode Pentode

CV3810 CV3811

WD709

B9A	1	2	3	4	5	6	7	8	9
	g2	g1	k,s	h	h	a	a(d1)	a(d2)	g3

 
Double Diode Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	85	-2	5.0	1.75	1.4M	2.2

 
6N8 EBF80 ZD152

Wecovalve

1923

Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm	μ
	1.0	0.25	45	-2	1.0	18,000	0.26	4.7

 
 

WL-417A

Klystron

WL734

Photocell

CE1V R59AV VS118 WL734

WL735

Photocell

3554 4GSM 50CG 868 CE1 CMG32 G8 GS146 NU1 PJ23 R59A WL735

WL737

Photocell

4GC 814A CE2 GS117A NU2 R71A

WR1

1924

B4	1	2	3	4
	a	g1	f	f

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.0	0.3	120	-3.0	-	19,000	.038