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

 Midland

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

2V D.E.H.F.

RF triode

2.0*

0.25

-

-

58.0

0.29

B4

1

1927

2V D.E.L.F.

Detector or AF triode

2.0*

0.25

-

-

18.5

0.28

B4

1

1927

4V B.E.H.F.

RF triode

4.0*

0.50

-

-

52.0

0.35

B4

1

1927

4V B.E.L.F.

Detector or AF triode

4.0*

0.50

-

-

12.0

0.60

B4

1

1927

4V D.E.H.F.

RF triode

4.0*

0.20

-

-

52.0

0.35

B4

1

1927

4V D.E.L.F.

Detector or AF triode

4.0*

0.20

-

-

12.0

0.42

B4

1

1927

M.P.2

Output triode

2.0*

0.34

-

-

12.0

0.42

B4

1

1927

M.P.4

Output triode

4.0*

0.50

-

-

14.5

0.34

B4

1

1927

P.2

Output triode

2.0*

0.40

-

-

10.0

0.57

B4

1

1927

P.6

Output triode

6.0*

0.25

-

-

6.5

0.85

B4

1

1927