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

 Lustrolux

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

4VBE

See 470BE

206 HF

RF or detector triode

2.0*

0.06

80

-

-

50.0

0.24

B4

1

1926

206 LF

AF triode

2.0*

0.06

80

-

-

25.0

0.28

B4

1

1926

210 HF

RF or detector triode

2.0*

0.10

-

-

B4

1

210 LF

AF triode

2.0*

0.10

-

-

B4

1

210 RC

RCC triode

2.0*

0.10

-

-

B4

1

210SG

RF tetrode

2.0*

0.10

150

80

240.0

0.90

B4+tc

2

1928

212 HF

RF or detector triode

2.0*

0.12

80

-

-

45.0

0.29

B4

1

1926

212 LF

AF triode

2.0*

0.12

80

-

-

20.0

0.35

B4

1

1926

225 PV

Output triode

2.0*

0.25

-

-

B4

1

234 HF

General-purpose triode

2.0*

0.34

100

-

-

50.0

0.20

B4

1

1926

234 LF

AF triode

2.0*

0.34

100

-

-

25.0

0.28

B4

1

1926

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

234 P

AF or output triode

2.0*

0.34

120

-

-

2-6

13.0

0.42

B4

1

1926

234 P (Astra)

AF or output triode

2.0*

0.34

120

-

-

2-6

12.0

0.62

B4

1

1926

234 PV

AF or output triode

2.0*

0.34

-

-

12.0

B4

1

306 HF

RF triode

3.0*

0.06

80

-

-

50.0

0.20

B4

1

306 LF

AF triode

3.0*

0.06

80

-

-

25.0

0.28

B4

1

1926

312P, 312 PV

AF or output triode

3.0*

0.12

120

-

-

3-9

10.0

0.60

B4

1

1926

406 HF

RF or detector triode

4.0*

0.08

80

-

-

40.0

0.37

B4

1

1926

406 LF

Detector or AF triode

4.0*

0.08

80

-

-

3.0

18.0

0.44

B4

1

1926

410 HF

RF or detector triode

4.0*

0.10

-

-

B4

1

410 RC

RCC triode

4.0*

0.10

-

-

B4

1

412P 412 PV

AF or output triode

4.0*

0.12

120

-

-

3-9

12.0

0.67

B4

1

1926

418 PV

Output triode

-

-

B4

1

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

434P, 434 PV

AF or output triode

4.0*

0.34

120

-

-

3-9

12.0

0.67

B4

1

470 BE, 4VBE

General-purpose triode

4.0*

0.70

80

-

-

25.0

0.28

B4

1

1926

525

Output triode

5.5*

0.25

120

7.0

-

-

4.5

8.3

0.80

B4

1

1927

525B

General-purpose triode

5.5*

0.25

120

2.0

-

-

1.5

40.0

0.45

B4

1

1926

534P, 534 PV

Output triode

5.5*

0.34

120

-

-

3-9

7.0

1.00

B4

1

1926

606P, 606 PV

AF or output triode

6.0*

0.08

120

-

-

3-9

12.0

0.58

B4

1

1926

625 PV

Output triode

-

-

B4

1

634 PV

Output triode

-

-

B4

1

1927

Aston

Output triode

2.0*

0.34

120

-

-

2-6

12.0

0.62

B4

1

1926

R.5V

General-purpose triode

5.0*

0.70

30-120

-

-

3-6

30.0

0.30

B4

1

1926

SG2

RF tetrode

2.0*

0.10

150

75-80

240.0

0.90

B4+st

21

1928