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

 Stal

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

A1

General-purpose triode

2.0*

0.06

120

-

-

19.0

0.55

B4

1

1928

A2

General-purpose triode

3.5*

0.06

120

-

-

20.6

0.30

B4

1

1928

A3

Output triode

2.0*

0.22

-

-

6.25

1.33

B4

1

1928