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

 HMV

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

H2

Triode

2.0*

0.10

B4

1

S33

Triode

B4

1

S34 = DO20

Output triode

7.5*

1.25

B4

1

Rectifiers

Type

Class

Cathode

Va

DC Ia

PIV

DC Vo

Base

Year

Type

Volts

Amps

Max RMS

mA

Volts

Volts

Type

Ref

Year

 HMV

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

S70 = DW15 Mullard

FW

DH

7.5

0.60

B4

5