A0897

Triode

A11B

B4	1	2	3	4
	a(1)	a(2)	f	f

 
Rectifier FW

Rectifier	Vh	Ah	Va	mAa
	4.0	2.3	500	120

 
UU5

A11C

B4	1	2	3	4
	a(1)	a(2)	f	f

 
Rectifier FW

Rectifier	Vh	Ah	Va	mAa
	4.0	2.3	500	120

 
UU5

A11D

B4	1	2	3	4
	a(1)	a(2)	f	f

 
Rectifier FW

Rectifier	Vh	Ah	Va	mAa
	4.0	2.3	500	120

 
UU5

A1714

B7G	1	2	3	4	5	6	7
	g1	k	h	h	-	ic	a

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	gm
	6.3	0.5	150	-1	10.0	9.0

 
CV0408

A207

Rectifier HW

CV2160 CV8051

A2087

Noise Diode

CV2171

A2134

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

 
Pentode

Pentode	Vh	Ah	Va	Vs	mAa	mAs	Pout	D
	6.3	0.635	250	165	40	12	13.3W	4.5%

 
CV4062 CV4065 CV2179

A2196

Triode

CV3920

A2235

B5	1	2	3	4	5
	a(4)	k	a(2)	a(3)	a(1)

 
Voltage Stabiliser

Stabiliser	Va	mAa
	280	35

 
AW4 CV1068 STV280/40 VS68

A2244

Triode

CV3921

A2272

Rectifier EHT

CV2318

A2293

Pentode

CV4079

A237

Rectifier HW

CV0482

A239

UX4	1	2	3	4	tc
	f(tap)	f	-	f	a

 
Rectifier HW

Rectifier	Vh	Ah	mAa
	5.0	3.0	60

 
3B24W CV2858

A2521

Triode

CV2453 CR4

A2599

Triode

CV5242 6CT4

A2674

Pentode

A2688

Triode

CV4081

A27D

B7	1	2	3	4	5	6	7	tc
	a(d2)	k	a(d1)	h	h	a	g2	g1

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	4.0	2.25	250	250	-6	36	5.0	50,000	9.5	4.3W	10%

 
Pen4DD

A292

Rectifier HW

CV5998

A3064

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	0.3	250	250	-2	10	2.5	1M	7.6

 
CV4014

A45

B4	1	2	3	4
	a	g1	f	f

 
Triode

Triode	Vh	Ah	Va	Vg	ra	gm
	4.5	0.6	30-120	-6	20k	0.45

 
 

A50A

Pentode

SP4

A50B

Pentode

SP4B

A70B

B5	1	2	3	4	5	tc
	a	g1	h	h	k	g2

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	4.0	1.0	250	250	-15.5	32	6	75k	2.7	3.3W	7%

 
7A2 AC/Pen

A70C

Pentode

7A3 AC2/Pen

A70D

B7	1	2	3	4	5	6	7
	-	g1	g2	h	h	k	a

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	4.0	1.95	250	250	-5.8	36	5.0	50,000	9.5	3.8W	10%

 
PenA4

A70E

Pentode

PenB4

A80A

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

 
Octode

Octode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	4.0	0.65	250	70	-1.5	1.6	3.8	0.6

 
15A2 FC4

A915

Pentode

CV1462

AB500

Triode

AC/DD

Double Diode

AC/DDT

B7	1	2	3	4	5	6	7	tc
	a(d2)	m	a(d1)	h	h	k	a	g1

 
Double Diode Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	4.0	1.0	250	-4	4.0	18,200	2.2

 
MHD4 TDD4

AC/HL

B5	1	2	3	4	5
	a	g	h	h	k

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	4.0	1.0	200	-3.5	5.0	12,500	2.8

 
354V 41MHL AR17 CV0399 CV1037 D4 HL4 MH4 NR31 VR37 A30D MHL4

AC/HLDD

B7	1	2	3	4	5	6	7	tc
	a(d2)	m	a(d1)	h	h	k	a	g1

 
Double Diode Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	4.0	1.0	250	-4	4.0	18,200	2.2

 
MHD4 11A2 DDT DDT4 DH42 H4D TDD4 A234

AC/HLDDD

Triple Diode Triode

AC/ME

B7	1	2	3	4	5	6	7
	-	g	t	h	h	k	a

 
Tuning Indicator

CRT	Vh	Ah	Va	mAa	Vg
	4.0	0.5	250	1.5	-22

 
 

AC/P

Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	4.0	1.0	200	-12	20.0	2650	3.75

 
CV1179 ML4 NR57

AC/P1

Triode

AC/P4

Triode

CV0207

AC/Pen

Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	4.0	1.0	250	250	-15.5	32	6	75k	2.7	3.3W	7%

 
7A2 A70B APP4A CV1174 KT42 MKT4/7 MKT4/5 Pen4VA N40 MP/Pen

AC/S1VM

Pentode

AC/S2

Tetrode

AC/S2Pen

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	gm
	4.0	1.0	250	100	-1.75	3.3	1.0	2.4

 
AC/SG CV1282 8A1 SPT4A MSP4 MS/Pen HP410C

AC/SG

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

 
Tetrode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	4.0	1.0	250	100	-1.75	3.3	1.0	2.4

 
CV1164 CV2822 MSP4 8A1 AC/S2Pen HP4101C SP4 SPT4A MS/Pen

AC/SGVM

B5	1	2	3	4	5	tc
	g2	g1	h	h	k	a

 
Tetrode

Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	4.0	1.0	200	80	0	8.0	1.5	2.9

 
AS4125 CV1165 MVSPen VMS4B VP4 MM4V AS4125

AC/SP1

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
	4.0	1.0	200	200	-3.0	4.9	4.1	0.12M	2.65

 
CV2820

AC/SP3

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	gm
	4.0	1.3	200	100	-2.5	8.0	1.5	4.7

 
CV2823 TSP4

AC/SP3RH

Pentode

CV1430

AC/TH1

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

 
Triode Heptode

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

 
20A1 41STH CV2830 TH4/A/B TH4B X41 4THA MM4V AS4125

AC/TH1A

Triode Heptode

AC/TP

B9	1	2	3	4	5	6	7	8	9	tc
	g2	a	g3	h	h	k	at	gt	m	g1

 
Triode Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	4.0	1.25	250	200	-5	6.5	2.5	0.9M	0.7

 
TP4

AC/VP1

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

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	4.0	0.65	250	250	-2.8	7.4	1.85	1M	2.0

 
9A1 CV0518 HP4106C MVSPen VMP4G VPT4B VP4 VP4A A50M

AC/VP2

MO	1	2	3	4	5	6	7	8	tc
	h	k	a	g2	g3	m	-	h	g1

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	4.0	0.65	250	200	-2.7	7.7	2.0	1.3M	2.0

 
CV2832 W42 VP41 A50P MVS/PenB VP4B

AC042

B4	1	2	3	4
	a	g1	f	f

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm	rk	rl	Pout	D
	2.0	2.0	300	-38	50.0	1,200	5.0	760	2,300	3.5W	5%

 
 

AC044

B4	1	2	3	4
	a	g	f	f

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm	Pout	D
	4.0	1.0	300	-38	50	1200	5	3.5	5%

 
4XP LP4 P12/250 PP3/250 PX4 S30C

AC2/HL

Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	4.0	1.0	250	-1.2	2.5	11,500	6.5

 
41MHL 904V HLA2 MH41 41MH A30B MH4 HLA1 NH41

AC2/P

Triode

AC2/Pen

B7	1	2	3	4	5	6	7
	-	g1	g2	h	h	k	a

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	4.0	1.95	250	250	-5.8	36	5.0	50,000	9.5	3.8W	10%

 
7A3 CV2808 PenA4 PT4 N41 A70C Pen4UB KT41

AC2/PenDD

Double Diode Pentode

PT4D DDPP4B DN41

AC4Pen

Pentode

ARP8 CV1326

AC5Pen

Pentode

PT10

AC5PenDD

Double Diode Pentode

CV1196

AC6Pen

Pentode

CV1189

ACL4

Triode

ACM3

Triode

Pentode	Vh	Ah	Va	Vg	mAa	gm	μ	Pdiss
	6.0	17.0	2,000	-	2,000	27	14	2,000W

 
BR1167

ACP4

Triode

CV1190 CV1198

ACS2/Pen

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
	4.0	1.0	250	100	-1.5	8.0	2.7	0.7	4.6

 
 

ACS4

CR1100

ACS5

Tetrode (Power)

4CX5000A

ACT14

Triode (Power)

BR140

ACT16

Triode (Power)

BR153

ACT17

Triode (Power)

CV0225

ACT22

Triode (Power)

CV0257

ACT24

Triode (Power)

CV0240

ACT36

Triode (Power)

AT37

ACT6

Triode (Power)

AT75 CV1222 CV2825 NT39

ACT70

Triode (Power)

BR1160

ACT9

Triode (Power)

Triode	Vh	Ah	Va	Vg	mAa
	16	22	10,000	-430	170

 
CV0028

AD1

B4	1	2	3	4
	fc	mc	h	h

 
Thermal Delay Switch

Delay	Vh	Ah	Va	mAa
	4.0	1.5	250	6,000

 
CV1314 DLS10

AF3

Ct8	1	2	3	4	5	6	7	8	tc
	m	h	h	k	g3	-	g2	a	g1

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	4.0	0.65	250	100	-3	8.0	2.6	10M	1.8

 
 

AFN202

CV3

AFX203

Thyratron (Xenon)

CV2868

AFX212

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

 
Thyratron (Xenon)

Thyratron	Vh	Ah	Va	Vg	mAa
	6.3	0.25	250	-	25

 
6D4 CV1949

AFX234

Thyratron (Xenon)

CV5023

AG5209

Voltage Reference Tube

QS1209/5651

AG5210

B7G	1	2	3	4	5	6	7
	a	k	ic	k	a	ic	k

 
Voltage Stabiliser

Stabiliser	Va	mAa
	108	30

 
0B2 CV1833 CV8162

AG5211

B7G	1	2	3	4	5	6	7
	a	k	ic	k	a	ic	k

 
Voltage Stabiliser

Stabiliser	Va	mAa
	150	5-30

 
0A2 CV1832 CV8161

AG869B

Rectifier MV

869B

AH201

B4D	1	2	3	4	tc
	f	f	-	-	a

 
Rectifier HW

Diode	Vh	Ah	Va	mAa
	2.5	5.0	3500	250

 
2V/400A 3B28 866A CV0032 ESU866 RG3-250A

AH205

Rectifier MV

CV2673

AH211A

Rectifier MV

CV0532

AH213

Rectifier MV

869B

AH217

Rectifier HW

Rectifier	Vh	Ah	mAa
	5.0	7.5	1250

 
4064B 872 872A CV0642 ESU872

AH221

Rectifier MV

CV0005 ESU200 GU21 RG4-1250 CV1435

AH238

Rectifier MV

CV1629

AH2511

Rectifier MV

6693

AL1

CV0159

AL60

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
	4.0	2.1	800	275	-7	72	8.0	20,000	14.5

 
CV0009

AN1

B5	1	2	3	4	5
	a	g	h	h	k

 
Thyratron

Thyratron	Vh	Ah	Va	mAa
	4.0	1.35	500	1000

 
GT1C CV1128

AP1188

Neon Wattmeter

CV0264

APP4A

B5	1	2	3	4	5	tc
	a	g1	h	h	k	g2

 
Pentode

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	4.0	1.0	250	250	-15.5	32	6	75k	2.7	3.3W	7%

 
7A2 AC/Pen CV1683 MKT4/5 MKT4/7 MP/Pen A70B KT42 N40 P4VA Pen4VA

APP4B

B7	1	2	3	4	5	6	7
	-	g1	g2	h	h	k	a,

 
Pentode

Beam Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm	Pout	D
	4.0	2.0	250	250	-4.4	40	8.5	10.5	4.2W	8%

 
7A3 AC2/Pen CV1181 KT41 PenA4 7A2 Pen4VB N41 A70C PT4 42MP/Pen

APP4G

Pentode

ARP10 CV1329

APV4

B4	1	2	3	4
	a(1)	a(2)	f	f

 
Rectifier FW

Rectifier	Vh	Ah	Va	mAa
	4.0	2.3	500	120

 
CV1039 UU5 MU14 1W4-350 R42 R3 1867

AR

B4	1	2	3	4
	a	g1	f	f

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	4.0	0.75	30-50	-	-	30,000	0.33

 
 

AR10T

Ignitron

BK24/5552A

AR14T

Ignitron

BK42/5551A

AR31

Ignitron

BK66/5550

ARDE

B4	1	2	3	4
	a	g1	f	f

 
Triode

Triode	Vh	Ah	Va	Vg	mAa	gm
	1.8	0.3	20-50	-6	-	0.31

 
 

AS4100

Tetrode

AS4125

B5	1	2	3	4	5	tc
	g2	g1	h	h	k	a

 
Tetrode

Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	4.0	1.0	200	80	0	8.0	1.5	2.9

 
AC/SGVM CV1165 MVSPen VMS4B VP4

ASGL1M

CV0071

ASG5017

Thyratron (Mercury Vapour)

BT19 CV1144

AX105

Thyratron

AX255

Thyratron

AX260

Thyratron

AX4-125A/4D21

Tetrode (Power)

C1108 CV2130

AX4-250A/5D22

Tetrode (Power)

C1112 CV2131

AX50

Rectifier FW

AX9903

B7A	1	2	3	4	5	6	7
	k bp	htap	g1(1)	h	h	g1(2)	g2

 
Tetrode (Power)

Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	mAg	Pdriv	Pout	Pdiss	freq	f.max
	6.3	1.8	600	250	-80	200	18	7	3W	90	40W	275	486

 
C178A/5894 CV2797

AX9904

Triode (Power)

BW1165

AX9904R

Triode (Power)

BR1165

AX9907

CW1100

AX9907R

CR1100

AX9910

B7A	1	2	3	4	5	6	7	tc	tc
	k,bp,s	htap	g1(1)	h	h	g1(2)	g2	a(1)	a(2)

 
Tetrode (Power)

Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	mAg	Pdriv	Pout	Pdiss	freq	f.max
	6.3	1.3	600	250	-60	100	8	1.4	1.5W	48	20W	200	600

 
C1134 CV2799

AX9911

Thyratron (Hydrogen)

FX2505 CV1787 CV5247

AX9912

Thyratron (Hydrogen)

8503 CV6022

AZ1

Ct8	1	2	3	4	5	6	7	8
	-	f	f	-	a(1)	-	-	a(2)

 
Rectifier FW

Rectifier	Vh	Ah	Va	mAa
	4.0	1.1	500	60

 
 

AZ31

Rectifier FW

CV2862 U143

AZ41

B8A	1	2	3	4	5	6	7	8	9	tc

 
Rectifier FW

Pentode	Vh	Ah	Va	mAa
	4.0	0.72	500	60

 
CV3892

Audion

Triode

Augetron

Electron Multiplier