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

 ARA

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

1

General-purpose triode

3.8-4.0*

0.06

30-80

-

-

0-6

B4

1

1926

3

AF triode

3.8-4.0*

0.06

30-80

-

-

0-6

B4

1

1926

6

General-purpose triode

3.5-4.0*

0.06

30-80

-

-

0-6

B4

1

1926

7A

AF triode

3.5-4.0*

0.06

-

-

12.5

1.04

B4

1

1926

8

Output triode

3.5-4.0*

0.25

60-150

-

-

3-12

B4

1

1926

9

AF triode

1.8-2.0*

0.25

50-150

-

-

0-7.5

12.5

0.56

B4

1

1926

13

General-purpose triode

1.8-2.0*

0.08

30-90

-

-

15.0

0.20

B4

1

1926

15

RF or RCC triode

1.3-1.5*

0.20

40-120

-

-

40.0

0.22

B4

1

1926

16

General-purpose triode

2.7-3.0*

0.06

-

-

30.0

0.53

B4

1

1926

17

Output triode

3.5-4.0*

0.23

40-200

-

-

3-15

8.0

0.87

B4

1

1926