X101

Triode Hexode

X109

Triode Hexode

X118

Triode Hexode

10C1 X145

X119

B9A	1	2	3	4	5	6	7	8	9
	g2,g4	g1	k,g5,s	h	h	a(h)	g3	a(t)	g1(t)

 
Triode Hexode

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	19.0	0.1	200	119	-2.6	3.7	8.1	1.0M	0.78

 
10C14 19D8 UCH81

X14

Heptode

1A7G DK32 1A7G

X142

B8A	1	2	3	4	5	6	7	8
	h	a	a(t)	g(t),g3	g2,g4	g1	k	h

 
Triode Heptode

Hexode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	14	0.1	200	85	-2	3	3	1M	0.75

 
141TH 14K7 UCH42

X145

Triode Hexode

X118 10C1

X147

Triode Hexode

6K8G X61M

X148

B8B	1	2	3	4	5	6	7	8
	h	a	a(t)	g1(t),g3	g2,g4	g1	k	h

 
Triode Hexode

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	100	-2	1.7	2.2	2.0M	2.0

 
7S7 X81

X150

Triode Hexode

6C10 6CU7 ECH42

X17

B7G	1	2	3	4	5	6	7
	f-	a	g2,g4	g1	f-	g3	f+

 
Heptode

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	1.4	0.05	90	45	-0	0.8	1.9	0.8M	0.25

 
1C1 1R5 CV0782 DK91

X18

B7G	1	2	3	4	5	6	7
	f(-)	a	g2	g1	g4	g3	f(+),g5

 
Heptode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	1.4	0.05	90	67.5	0.0	1.15	2.85	0.6M	0.32

 
1AC6 1C2

X20

B7G	1	2	3	4	5	6	7
	f+	a	g2	g1	g4	g3	f-,g5

 
Heptode

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	1.4	0.05	85	60	0	0.7	0.15	0.65M	0.325

 
1AC6 1C2 DK92

X21

Heptode

CV3816

X21MET

Heptode

CV3817

X22

Heptode

210PG CV1043 CV3818 VHT2A VR43

X23

Triode Hexode

X24

Triode Hexode

220TH CV1082 CV3819

X24MET

Heptode

CV3820

X25

B7G	1	2	3	4	5	6	7
	f-	a	g2	g1	g4	g3	f+,g5

 
Heptode

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	1.4	0.025	85	68	0	0.6	0.14	0.8M	0.3

 
1AB6 1C3 DK96

X30

Heptode

X31

B7	1	2	3	4	5	6	tc
	a(t)	g1(t),g3	g2,g4	h	h	m,k 7_a	g1

 
Triode Hexode

Hexode	Vh	Ah	Va	Vs	Vg	gm
	13.0	0.3	250	80	-1.5	0.55

 
CV3821

X31MET

Triode Hexode

CV3822

X32

Heptode

X41

Triode

20A1 CV1194 CV1460 NR84

X41MET

B7	1	2	3	4	5	6	7	tc
	a(t)	gt,g3	g2,g4	h	h	m,k	a	g1

 
Triode Hexode

Hexode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	4.0	1.3	250	100	-3	3.0	6.0	1.6	0.75

 
CV3823 AC/TH1 4THA 41STH 20A1 A36C

X42

B7	1	2	3	4	5	6	7	tc
	g2	g1	g3,g5	h	h	m,k	a	g4

 
Hexode

Heptode	Vh	Ah	Va	Vs	Vg	gm
	4.0	1.0	250	80	-3	0.5

 
15A2 CV3576 MX40 FC4 VHT4 41MPG A80A

X56

Triode

CV1045 VT45

X61

Triode Hexode

CV3824

X61M

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2,g4	g(t),g3	a(t)	h	k	g1

 
Hexode

Hexode	Vh	Ah	Va	Vs	Vg	mAa	ra	gm
	6.3	0.3	250	100	-3	1.75	2.5M	0.225

 
6K8G CV0281 CV1944 X65 OM10 X147 ECH35

X63

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g3,g5	g1	g2	h	k	g4

 
Heptode

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	100	-3	5	2.7	0.3M	0.49

 
6A8G CV0578 CV3825

X64

Heptode

ARH1 CV1280 NR67

X65

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2,g4	g(t),g3	a(t)	h	k	g1

 
Triode Hexode

Hexode	Vh	Ah	Va	Vs	Vg	mAa	ra	gm
	6.3	0.3	250	100	-3	1.75	2.5M	0.225

 
6K8G CV1193 CV3826 NR82 VR99 X147 ECH35 OM10 Z61M X61M

X66

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2,g4	g(t),g3	a(t)	h	k	g1

 
Triode Hexode

Hexode	Vh	Ah	Va	Vs	Vg	mAa	ra	gm
	6.3	0.3	250	100	-3	1.75	2.5M	0.225

 
CV1099 CV3828 VR99

X719

B9A	1	2	3	4	5	6	7	8	9
	g2-g4	g1	k-g5-s	h	h	a	g1	a(t)	g(t)

 
Triode Hexode

Triode	Vh	Ah	Va	mAa
	6.3	0.3	100	13

 
6AJ8 6C12 CV2128 ECH81

X71M

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2-g4	g(t)-g1	a(t)	h	k	g3

 
Triode Hexode

Hexode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	12.6	0.15	250	100	-3	2.5	6	0.6M	0.36

 
12K8GT X76M

X727

B7G	1	2	3	4	5	6	7
	g1	k	h	h	a	g2-g4	g3

 
Heptode

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Vosc
	6.3	0.3	250	100	-1.5	3	7.1	1M	0.475	10

 
6BE6 CV0453 EK90 X77

X76M

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2-g4	g(t)-g1	a(t)	h	k	g3

 
Triode Hexode

Hexode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	12.6	0.15	250	100	-3	2.5	6	0.6M	0.36

 
12K8GT X71M

X77

B7G	1	2	3	4	5	6	7
	g1	k	h	h	a	g2-g4	g3

 
Heptode

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Vosc
	6.3	0.3	250	100	-1.5	3	7.1	1M	0.475	10

 
6BE6 CV0453 EK90 X727

X78

B7G	1	2	3	4	5	6	7
	g2	g1	h,k	h	a	a(t)	g1(t)

 
Triode Hexode

Hexode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	75	0	4.5	3.4	0.7M	0.78

 
 

X79

Triode Hexode

CV5115

XA3446

Experimental

X81

B8B	1	2	3	4	5	6	7	8
	h	a	a(t)	g1(t),g3	g2,g4	g1	k	h

 
Triode Heptode

Hexode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	100	-2.0	3.0	2.4	1.0M	0.65

 
7S7 X148

XB1

B7G	1	2	3	4	5	6	7
	-	-	r	r	-	-	-

 
Barretter

XB2

Barretter

CV1634

XC12

Voltage Stabiliser

CV6004

XC13

Thyratron

XC15

Voltage Stabiliser

CV5088

XC18

Thyratron

G1/237G

XC23

Thyratron

XC24

Thyratron

XC31

Thyratron

XD60

CV0168

XD61

CV0169

XFG1

Thyratron

XFR1

Pentode

CV2237 DF62 R1AD4

XFR3

Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	1.25	0.12	135	-5	4.0	-	1.65

 
CV2239

XFR5

Pentode

XFW10

B5A	1	2	3	4	5
	a	g2	f+	g1	f-g3

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	0.0675	0.025	22.5	22.5	-0	0.2	0.01	1M	0.18

 
78E

XFW20

Pentode

XFW30

Pentode

XFW40

Pentode

XFW50

Pentode

XFY10

B5A	1	2	3	4	5
	a	g2	f+	g1	f-g3

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm	Pout
	1.4	0.025	22.5	22.5	-1.25	0.5	0.2	0.35	0.003

 
85D

XFY11

Pentode

XFY12

Pentode

XFY14

Pentode

CV2238 DL620

XFY15

Beam Tetrode

XFY21

Beam Tetrode

XFY22

Beam Tetrode

XFY23

Beam Tetrode

XFY31

Beam Tetrode

XFY32

Beam Tetrode

XFY33

Beam Tetrode

XFY34

Beam Tetrode

XFY35

Beam Tetrode

XFY41

Beam Tetrode

XFY43

Beam Tetrode

XFY51

Beam Tetrode

XFY53

Beam Tetrode

XFY54

Beam Tetrode

XG1-2500

Thyratron

XG2

Thyratron

XH1.5V

	1	2	3	4
	g1	f	f	a

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm	μ
	1.5	0.075	50	0	0.45	55k	0.4	22

 
 

XH3-045

Thyratron

Thyratron	Vh	Ah	Va	mAa
	6.3	2.7	3,000pk	50

 
CV0372

XJ

CV0119

XP1.5V

Sm4	1	2	3	4
	g1	f	f	a

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	1.5	0.08	50	-4.5	1.75	7250	0.72

 
CV0176

XRI3200

Thyratron

XR6

Pentode

XR8

Triode

XR9

Triode

XSG1.5

Tetrode

CV0175

XSG2.0V

Sm4	1	2	3	4	tc
	g2	g1	f	f	a

 
Tetrode

Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	2.0	0.08	50	30	0	0.6	0.3	0.5M	0.4