Radio Valve Data: 1915-1960

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

Triode Receiver Valves (pre-1926)^*

Type or
Trademark

Filament

Anode

Grid

r_a

g_m

μ

Year

Base

Notes
and applications

^{(1)The letters indicate the three types of filaments found on these valves. B = bright emitter, D = dull emitter, O = oxide-coated.}

Volts

Amps

Volts

-Volts

kΩ

mA/V

^{(2)The year shown is when it is believed the type was first issued. This date is accurate for most types but cannot be guaranteed for them all.}

^{(3)Pin-out details for non-exhibits can be found with the base details.}

  ^{★This table lists valves that were manufactured in the UK or which were claimed to be of UK manufacture. In practice several of the smaller companies imported their valves from abroad.}

 Army

A.R.

D

2.0

0.40

1921Ω

I/S3-I/S4

Probably the D.E.R.

A.R.3

D

2.0

0.40

Ω

I/S2

UK Government Valves

Type

Commercial Equivalents

Filament

Description & Comments

Base

Volts

Amps

Type

Ref

 Army

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

AR4 = CV1303

210HF (Cos), HL210 (Maz), PM1HF (Mul)

1.8*

0.10

Amplifying triode

B4

1

AR5 = CV1166

P220 (Maz), LP2 (MOV), PM2A (Mul)

2.0*

0.20

Output triode

B4

1

AR6 = CV1304

LP2 (MOV)

2.0*

0.20

Output triode (selected)

B4

1

AR7 = CV1109

HL133 (Maz), 4D1 (Bri)

13.0

0.20

Amplifying triode (modified - B7 base)

B7+tc

23

AR8 = CV1306

HL23DD (Maz)

2.0*

0.05

Double diode triode

MO+tc

7

AR9 = CV1307

210LF (Cos), L2 (Maz), L21 (MOV), PM1LF (Mul)

2.0*

0.10

Amplifying triode

B4

1

AR10 = CV1308

210DDT (Cos), L21DD (Maz), HD24 (MOV), TDD2A (Mul)

2.0*

0.10

Double diode triode

B5+tc

5

AR11 = CV1655

4019B (STC)

4.0*

0.25

Amplifying triode

B4

1

AR12 = CV1653

4020A (STC)

2.0*

0.25

Amplifying triode

BC4

1

AR13 = CV1664

4022AR (STC)

4.0*

0.25

Amplifying triode

BC4

1

AR14 = CV1312

220RC (Cos)

2.0

0.21

Amplifying triode (IH)

B5

1

AR15 = CV1313

220LF (Cos)

2.0

0.21

Output triode (IH)

B5

1

Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others

A616 = CV1032

220B (Cos)

2.0*

0.20

Class B output triode

B7

10

AR17 = CV1037

AC/HL (Maz), MH4 (MOV), 354V (Mul)

4.0

1.00

Amplifying triode

B5

1

AR20 = CV1663

4021B (STC)

4.0*

0.25

Output triode

B4

1

AR21 = CV1055

EBC33 (Mul)

6.3

0.20

Double diode triode

IO+tc

29

ARD2 = CV1078

D1 (Maz)

4.0

0.20

Single diode

B3G

1

ARD4 = CV1302

D42 (MOV)

4.0

0.20

Single diode

B4

8

ARDD1 = CV1300

10D1 (Bri)

13.0

0.20

Double diode

B5

3

ARDD3 = CV1301

D63 (MOV), 6H6G

6.3

0.30

Double diode

IO

53

ARDD5 = CV1054

EB34 (Mul)

6.3

0.20

Double diode

IO

53

ARH1 = CV1280

X64 (MOV), 6L7G

6.0

0.30

Heptode FC

IO+tc

2

ARP1 = CV1118

Pen220 (Maz), KT2 & kt2 (MOV), PM22A (Mul)

2.0*

0.20

Output pentode

B5

6

ARP2 = CV1320

SP2 (Mul)

2.0*

0.18

RF pentode

B7+tc

4

Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others

ARP3 = CV1321

9D2 (Bri)

13.0

0.20

VM RF pentode

B7+tc

6

ARP4 = CV1322

SP210 (Maz)

2.0*

0.10

RF pentode

B7+tc

4

ARP5 = CV1323

VP2 (Mul)

2.0*

0.18

VM RF pentode

B7+tc

4

ARP6 = CV1324

SP4 (Mul)

4.0

1.00

RF pentode

B7+tc

5

ARP7 = CV1325

42MPT (Cos)

4.0

2.00

RF pentode

B7+tc

5

ARP8 = CV1326

AC4/Pen (Maz), PenB4 (Mul)

4.0

1.75

Output beam tetrode

B7

24

ARP9 = CV1327

Pen1340 (Maz)

13.0

0.40

Output pentode (modified)

B7

24

ARP9A = CV1328

7D8S (Bri)

13.0

0.65

Output pentode

B7

24

ARP10 = CV1329

PenA4 (Mul)

4.0

1.95

Output pentode (modified - grid top cap)

B7+tc

15

ARP11 = CV1330

TSP4 (Mul)

4.0

1.30

RF pentode

B7+tc

6

ARP12 = CV1331

VP23 (Maz)

2.0*

0.05

VM RF pentode

MO+tc

1

ARP12T = CV2841

2.0*

0.05

RF pentode

MO+tc

1

Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others

ARP13 = CV1332

VP210 (Maz)

2.0*

0.10

VM RF pentode

B7+tc

4

ARP14 = CV1333

220IPT (Cos)

2.0

0.20

RF pentode (IH)

B7

26

ARP15 = CV1195

KTW63 (MOV)

6.3

0.30

VM RF tetrode

IO+tc

9

ARP16 = CV1074

KTZ63 (MOV)

6.3

0.30

RF tetrode

IO+tc

8

ARP17 = CV1186

KT63 (MOV), 6F6G

6.3

0.70

Output beam tetrode

IO

36

ARP18 = CV1334

KT24 (MOV)

2.0*

0.20

Output beam tetrode

B5

6

ARP19 = CV1335

SP41 (Maz)

4.0

0.95

RF pentode

MO+tc

11

ARP20 = CV1336

SP42 (Maz)

4.0

0.95

RF pentode

MO+tc

11

ARP21 = CV1192

Z62 (MOV)

6.3

0.45

RF pentode

IO+tc

8

ARP22 = CV1337

116/Pen (Cos)

11.5

0.65

Output pentode

B7+tc

15

ARP23 = CV1124

MS/Pen (Cos)

4.0

1.00

RF pentode

B7+tc

5

ARP24 = CV1338

220VPT (Cos)

2.0

0.21

VM RF pentode (IH)

B7

40

Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others

ARP25 = CV1181

KT61 (MOV)

4.0

2.00

Output pentode (modified - 4V heater)

B7

24

ARP26 = CV1340

KT44 (MOV)

4.0

2.00

Output pentode or output beam tetrode (modified)

B7+tc

5

ARP33 = CV1341

MSP4 (MOV)

4.0

1.00

RF pentode

B7+tc

5

ARP34 = CV1053

EF39 (Mul)

6.3

0.20

VM RF pentode

IO+tc

8

ARP35 = CV1091

EF50 (Mul)

6.3

0.30

RF pentode

B9G

1

ARP36 = CV1065

SP41 (Maz)

6.3

0.65

RF pentode (modified - 6.3V heater)

MO+tc

11

ARP37 = CV1342

QP25 (Maz)

2.0*

0.20

Double output pentode

MO

9

ARP38 = CV1343

KTZ73 (MOV)

4.0

0.25

RF pentode (modified - 4V heater))

IO+tc

8

ARS6 = CV1317

S625 (MOV)

6.0*

0.25

RF tetrode

B3+B2

ARS7 = CV1318

S215VM (Maz), VS24 (MOV), PM12M (Mul)

2.0*

0.16

VM RF tetrode

B4+tc

2

ARS8 = CV1319

VS2 (MOV), PM12V (Mul)

2.0*

0.10

VM RF tetrode

B4+tc

2

ARTH2 = CV1347

ECH35 (Mul)

6.3

0.30

Triode hexode FC

IO+tc

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

ARTP1 = CV1344

TP22 (Maz)

2.0*

0.25

Triode pentode FC

B9+tc

1

ARTP2 = CV1345

TP25 (Maz)

2.0*

0.20

Triode pentode FC

MO+tc

23

AT15 = CV2845

= CV1637, LS5 (MOV with BC4 base) = POVT25

4.5*

0.82

Triode

BC4

1

AT16 = CV2846

= CV1647, LS5B (MOV with BC4 base) = POVT40

4.85*

0.85

Triode

BC4

1

AT20 = CV1361

MZ05-20 (Mul)

6.0*

1.10

TX triode

B4

1

AT25

5.8*

TX triode

B4

1

AT26 = CV1360

6.0*

2.00

TX triode (25W dissipation)

B4

1

AT35 = CV1025

DET25 (MOV)

8.0*

2.20

TX triode

L4

1

AT40

7.0*

1.5

TX triode

B4

1

AT40X

Possibly MOV T.30

7.0*

1.8

TX triode

B4

1

AT50

7.5*

3.1

TX triode

S3+ts

-

AT75 = CV1222

ACT6 (MWT)

10.0*

1.65

TX triode

T4

1

Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others

AT100

10.0*

3.5

TX triode

S3+ts

-

AT00A = CV2850

No data found

TX triode

S3+ts

-

AT200

9.6*

3.5

TX triode. Double ended

-

-

AT200B = CV1363

DET16 (MWT)

10.0*

5.50

TX triode

T4

1

AT250

T.2.B

9.6*

3.5

TX triode. Double ended

-

-

ATP4 = CV1366

V248A (Maz)

2.0*

0.30

RF pentode

MO

25

ATP5 = CV1367

V245 (Maz)

3.0*

0.30

RF pentode

B7+tc

4

ATP7 = CV1368

V226 (Maz)

6.0*

0.20

RF pentode

B7+tc

4

ATP10 = CV1369

4061A (STC)

6.3

0.80

RF pentode

USM7

17

ATP35 = CV1370

PV1/35 (Mul)

12.0

0.60

TX RF pentode

B7+tc

39

ATP75 = CV1371

SW75Pen (Cos), PT6 (MOV), PZ1/75 (Mul)

10.0*

2.00

TX RF pentode(Suppressor grid connected to base skirt)

T4+tc

2

ATP100 = CV1372

4069A (STC)

5.4*

10.00

TX pentode

USG5 +tc

Diag. 43

Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others

ATP600 = CV1373

12.0*

7.50

TX pentode

ATS25 = CV1374

5C250/A (STC), 807

6.3

0.90

RF beam tetrode

USM5+tc

6

ATS25A = CV1364

As above

6.3

1.00

RF beam tetrode (1A heater current)

USM5+tc

6

ATS70 = CV1365

4282B (STC)

10.0*

3.00

TX RF tetrode

USM4b+tc

New

ATS250 = CV1031

SG250 (Mul)

11.25*

8.00

TX tetrode

None

-

AU1 = CV1264

U18 (MOV)

4.0*

3.75

Full-wave rectifier

B4

5

AU2 = CV1349

5.0

11.0*

Half-wave mercury-vapour rectifier

ESM+tc

-

AU3 = CV1065

U12/14 (MOV), DW4/500 (Mul)

4.0

2.50

Full-wave rectifier

B4

5

AU3A = CV1039

UU4 (Maz), MU12/14 (MOV), IW4/500 (Mul)

4.0

2.50

Full-wave rectifier

B4

14

AU4 = CV1113

U17 (MOV)

4.0*

1.00

EHT half-wave rectifier

B4+tc

6

AU5 = CV1111

V1907 (Maz), E1132 (MOV)

4.0*

1.10

EHT half-wave rectifier

B4+tc

6

AU6 = CV1072

MU4250 (Cos), GU50 (MOV), RG1-240 (Mul)

4.0*

3.00

High-voltage mercury-vapour rectifier

B4+tc

6

Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others

AU8 = CV1356

U22 (Maz)

2.0

2.00

EHT half-wave rectifier

MO+tc

17

AU12 = CV1266

U15 (MOV), RG1-250 (Mul)

6.0*

2.00

High-voltage half-wave rectifier

L4

3

AU13 = CV1863

5Z4

5.0*

2.00

Full-wave rectifier

IO

62

AW2 = CV1070

7475 (Mul)

Cold

Gas-filled voltage stabiliser. 100V, 4mA

B4

12

AW3 = CV1110

S130 (Cos)

Cold

Gas-filled voltage stabiliser. 115-120V, 10-75mA

B4

12

AW4 = CV1068

STV/280-40 (MOV)

Cold

Gas-filled voltage stabiliser. 40V, 140V, 210V, 280V, 60mA max

B5

15

AW5 = CV1359

ME41 (Maz)

4.0

0.45

Tuning indicator

MO

21

AW6 = CV1077

EM31 (Mul)

6.3

0.20

Tuning indicator

IO

46