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

 Micromesh

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

5B1

RF tetrode

2.0*

0.18

150

0.5

75

0.15

400.0

1.25

B4+tc

2

1933

7A2

Output pentode

4.0

1.20

250

32.0

250

8.0

17.0

8.0

3.0

B7

24

1933

8A1

RF pentode

4.0

1.00

250

3.5

100

1.9

375.0

4.00

B5+tc

2

1933

9A1

VM RF pentode

4.0

1.00

250

5.0

100

2.0

1.5

600.0

4.25

B5+tc

2

1933

9A3

VM RF pentode

4.0

0.65

250

10.0

125

3.0

2.0

600.0

1.80

B7+tc

6

1934

11A2

Double diode triode

4.0

1.00

200

3.0

-

-

2.0

18.0

2.80

B7

7

1933

15A2

Heptode FC

4.0

0.65

250
 200

3.5
 

100
 

2.0
 

3.0
 

300.0
 

0.6⅄
0.75

B7+tc

2

1934

HLB1

Detector triode

2.0*

0.10

150

2.0

-

-

3.0

16.0

1.50

B4

1

1933

HLA1

Detector or AF triode

4.0

1.00

200

5.0

-

-

1.0

16.0

8.00

B5

1

1933

HLA2

Detector or AF triode

4.0

1.00

200

6.0

-

-

2.5

9.0

5.50

B5

1

1933

PA1

Output triode

4.0

1.00

200

40.0

-

-

10.5

1050Ω

12.00

4.0

1.25

B5

1

1933

PB1

Output triode

2.0*

0.10

125

7.0

-

-

6.0

4.0

2.00

10.0

0.15

B4

1

1933

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

PenA1

Output pentode

4.0*

1.00

250

32.0

250

7.0

16.0

8.0

2.85

B5

6

1933

PenB1

Output pentode

2.0*

0.20

150

8.0

150

1.8

4.5

4.0

4.00

18.0

0.50

B5

6

1933

SGA1

RF tetrode

4.0

1.00

200

6.0

100

1.5

500.0

3.00

B5+tc

2

1933

VSGA1

VM RF tetrode

4.0

1.00

200

7.0

100

1.8

1.5

200.0

6.15

B5+tc

2

1933