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

 Octron

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

H210 (red line)

General-purpose triode

1.8*

0.10

30-80

-

-

2.0

43.0

0.28

B4

1

1926

H408 (red line)

General-purpose triode

3.7*

0.08

30-80

-

-

2.0

30.0

0.43

B4

1

1926

H610

General-purpose triode

5.4*

0.10

30-90

-

-

28.0

0.25

B4

1

1926

HF2

General-purpose triode

2.0*

0.10

120

-

-

1.0

30.0

0.50

B4

1

HF4

General-purpose triode

4.0*

0.10

-

-

24.0

0.75

B4

1

1929

HR210 (blue line)

Detector or RCC triode

1.8*

0.10

120

-

-

1.5

50.0

0.36

B4

1

1926

HR408 (blue line)

Detector triode

3.7*

0.08

120

-

-

1.5

25.0

0.44

B4

1

1926

HR610

Triode

5.4*

0.10

-

-

B4

1

1929

L210

Detector or AF triode

1.8*

0.10

30-100

-

-

2-4

25.0

0.30

B4

1

1926

L408 (green line)

AF triode

3.7*

0.08

30-100

-

-

2-4

16.5

0.45

B4

1

1926

L610

AF triode

5.4*

0.10

60-100

-

-

2-5

14.0

0.61

B4

1

1926

LF2

AF triode

2.0*

0.10

-

-

15.0

0.60

B4

1

1929

Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others

LF4

AF triode

4.0*

0.10

-

-

10.0

0.90

B4

1

1929

LP2

AF triode

2.0*

-

-

B4

1

1929

LP4

Output triode

4.0*

0.15

-

-

6.0

1.00

B4

1

1929

LP6

Output triode

6.0*

0.15

120

5.2

-

-

9.0

6.7

0.90

B4

1

1929

LP240 (white line)

Output triode

1.8*

0.40

60-120

-

-

4-12

8.5

0.59

B4

1

1926

LP430 (white line)

Output triode

3.7*

0.30

60-120

-

-

5-12

7.5

0.66

B4

1

1926

LP625

Output triode

5.4*

0.25

60-120

-

-

8-12

6.5

0.77

B4

1

1926

PP4

Output triode

4.0*

0.20

90-120

-

-

12.0

2.7

1.50

B4

1

1929

RC2

RCC triode

2.0*

0.10

-

-

50.0

0.50

B4

1

1929

RC4

RCC triode

4.0*

0.10

-

-

45.0

0.60

B4

1

1929