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

 Sutra

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

Microsutra

General-purpose triode

2.0*

0.06

-

-

30.0

B4

1

1927

Supersutra

Output triode

2.0*

0.15

-

-

7.0

B4

1

1927