Radio Valve Data: 1915-1960

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

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

 Ostar Ganz

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

A.520

General-purpose triode

100/250

0.024

250

4.0

-

-

6.0

8.8

2.50

B5
C7

1
5

1932
1934

B.2

Double diode

100/250

0.024

200

15.0

-

-

C7

4

1934

BA1

Single diode triode

150/250

0.024

200

2.0

-

-

1.0

45.0

2.00

C7

10

1933

BA5

Single diode triode

150.0

0.024

200

5.0

-

-

6.0

10.0

2.00

C7

10

1933

D.130

High-μ triode

100/250

0.024

250

2.0

-

-

1.0

40.0

3.50

B5
C7

1
5

1933
1933

G.5

Heptode FC

100/250

0.024

mix250
osc140

3.5
3.0

75
 

4.5
 

1.0
 

1.5M
 

0.6⅄
 

C7

1

1934

H.3

RF pentode

100/250

0.024

250

3.5

100

1.5

1.5M

3.50

C7

3

1934

K.2050

Output triode

100/250

0.024

300

40.0

-

-

40.0

1.0

5.00

1.8

3.5

B5

1

1934

K.3560

Output triode

100/250

0.024

220

50.0

-

-

50.0

500Ω

6.00

1.2

4.0

B5

1

1933

L.1525

Output triode

100/250

0.024

300

20.0

-

-

20.0

1850Ω

3.00

5.0

0.90

B5

1

1932

M.43

Output pentode

100/250

0.037

250

40.0

200

8.0

24.0

35.0

3.2

6.0

3.5

C7

6

1934

M.44

Output pentode

100/250

0.037

250

40.0

200

5.0

7.5

6.0

9.0

C7

6

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

MS.18

VM RF tetrode

100/250

0.024

250

5.0

100

3.0

2/18

500.0

3.00

B5+tc
C7

2
2

1933
1933

MS.70

VM RF tetrode

100/250

0.024

250

4.0

100

2.5

2/70

500.0

3.00

B5+tc
C7

2
2

1933
1933

Pt.3 Pt4

Multigrid output pentode

100/250

0.024

250

20.0

250

4.0

24.0

100.0

3.5

15.0

1.5

C7
Ct8

6
46

1933
 

S.25

RF tetrode

100/250

0.224

250

4.0

100

0.4

2.0

250.0

3.80

B5+tc
C7

2
2

1933
1933

S.100

RF tetrode

100/250

0.024

250

1.0

100

0.2

1.0

1M

4.00

B5+tc
C7

2
2

1933
1933

U.920

Output triode

100/250

0.024

300

7.0

-

-

7.0

3.7

3.00

10.0

0.75

B5

1

1932

V.3

VM RF pentode

100/250

0.024

250

4.0

100

1.8

2/40

1.5M

3.00

C7

3

1934

W.310

Medium-μ triode

100/250

0.024

300

2.0

-

-

1.0

40.0

3.50

B5

1

1932

Rectifiers

Type

Class

Cathode

Va

DC Ia

PIV

DC Vo

Base

Year

Type

Volts

Amps

Max RMS

mA

Volts

Volts

Type

Ref

Year

 Ostar-Ganz

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

EG50

HW

IH

100/250

0.024

300

50

220

B5

8

1932

EG100

HW

IH

100/250

0.024

300

120

240

B5

8

1932

NG40

VD

IH

100/150

0.024

300

50

440

B5

21

1932

NG50

VD

IH

100/150

0.024

300

50

C7

7

1934

NG100

VD

IH

100/150

0.024

300

100

C7

7

1934

VG45 (Diode bridge)

FW

IH

150/250

0.044

45

260

B4

33

1932