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Radio Valve Data: 1915-1960

Keith R Thrower OBE, The Valve Museum, April, 2022.
    
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Help information: Abbreviations - Explanations - Notes.

 

Imported Triode Receiver Valves*

Type or
Trademark
Filament
Anode
Grid
ra
gm
μ
Year
Base
Notes
and applications
(1)The letters indicate the three types of filaments found on these valves. B = bright emitter, D = dull emitter, O = oxide-coated.
Volts
Amps
Volts
-Volts
kΩ
mA/V
 
(2)The year shown is when it is believed the type was first issued. This date is accurate for most types but cannot be guaranteed for them all.
(3)Pin-out details for non-exhibits can be found with the base details.
  ★This table lists valves that were manufactured in the UK or which were claimed to be of UK manufacture. In practice several of the smaller companies imported their valves from abroad.

 Triotron

T.10
D
1.8
0.20
20-100
2.5
18.0
1925Ω
B4
General purpose

 

Post-1925 amplifying valves, frequency changers
and signal diodes

Type
Description
Filament
Anode
Auxillary Grid
Grid
ra
gm/go
RL
Po
Rk
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
 

 Triotron

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
072
RF tetrode
2.0*
0.12
200
3.5
100
285.0
0.70
B4+tc
2
1931
084
RF tetrode
4.0*
0.07
200
2.5
100
310.0
0.80
B4+t
2
1931
094
RF tetrode (DC)
4.0*
0.10
200
4.0
100
350.0
0.90
B4+tc
2
1931
104 AC
RF tetrode
4.0
0.90
200
4.0
60
150.0
1.00
B5+tc
2
1931
124 AC
RF tetrode
4.0
0.90
200
1.5
100
400.0
1.00
B5+tc
2
1931
304 AC
RF tetrode
4.0
1.10
200
5.0
100
150.0
3.00
B5+tc
2
1931
A214
Triode
2.0*
0.10
150
4.0
-
4.5
12.0
1.40
B4
1
1934
A420
Detector triode
4.0*
0.09
150
4.0
-
-
7.5
2.00
B4
1
1931
A430
Detector triode (DC)
4.0*
0.10
150
3.5
-
-
3.0
8.3
3.00
B4
1
1931
A430N
Detector or AF triode
4.0
1.00
200
6.0
-
-
3.5
10.0
2.40
B5
1
1931
A440N
General-purpose triode
4.0
1.00
200
1.0
-
-
1.6
25.0
4.00
B5
1
1932
A2030N
Detector or AF triode
20.0
0.18
200
3.0
-
-
4.0
14.5
2.60
B5
1
1932
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
A2040N
Triode
20.0
0.18
200
0.20
-
-
1.5
30.0
4.00
B5
1
1933
A.D.4
RF or detector triode
4.0*
0.07
150
4.0
-
-
4.5
13.5
1.00
B4
1
1927
A.N.4
General-purpose triode
4.0
0.90
200
4.5
-
-
3.0
14.0
2.00
B5
1
1929
B430N
Single diode tetrode
4.0
1.00
200
0.35
33
0.25
2.3
3.3M
0.30
C7
8
1933
B2030N
Single diode tetrode
20.0
0.18
200
0.35
30
0.25
2.0
333.0
0.30
B7
43
1933
C.W.N.4
RF tetrode
4.0
0.90
200
6.5
75
150.0
1.00
B5+tc
2
1930
D200
Double diode
2.0*
0.10
125
0.5
-
-
B5
3
1935
D210
Bi-grid tetrode
2.0*
0.10
-
-
1.0
1.00
B4
28
1931
D400
Double diode
4.0
0.65
200
0.80
-
-
B5
3
1935
D410
Bi-grid tetrode
4.0*
0.08
10-20
10-20
1.00
B4
28
1931
D410N
B-grid tetrode
4.0
0.90
100
1.7
0
0
0
0.1
B5+st
16
1931
D1300
Double diode
13.0
0.20
200
0.8
-
B5
3
1935
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
DP495
Double diode output pentode
4.0
2.25
250
36.0
250
6.0
B7+tc
22
1938
DP4480
Double diode output pentode
44.0
0.20
200
45.0
200
B7+tc
22
1938
DT215
Double diode triode
2.0*
0.10
135
2.5
-
-
4.5
10.5
1.50
B5+tc
5
1936
DT436
Double diode triode
4.0
0.65
250
4.0
-
-
7.0
7.5
3.60
B7+tc
7
1935
DT1336
Double diode triode
13.0
0.20
200
4.0
-
-
5.0
7.5
3.60
B7+tc
7
1935
1935
E220B
Class B double triode
2.0*
0.30
150
3/7
-
-
0
1.35
18.0
1.35
B7
10
1933
E235
Output triode
2.0*
0.30
200
18.0
-
-
12.0
3.6
3.50
8.0
0.55
B4
1
1932
E414
Output triode
4.0*
0.10
200
9.0
-
-
15.0
4.3
1.40
7.5
0.2
B4
1
1931
E420
Output triode
4.0*
0.15
150
10.0
-
-
18.0
2.5
2.00
6.0
0.35
B4
1
1931
E422
Output triode
4.0*
0.15
200
13.0
-
-
15.0
4.1
2.20
6.0
0.4
B4
1
1931
E425
Output triode
4.0*
0.30
200
26.0
-
-
16.0
2.5
2.50
3.0
1.0
B4
1
1932
E430N
Output triode
4.0
1.00
200
15.0
-
-
15.0
3.0
3.00
10.0
0.35
1000
B5
1
1931
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
E2020N
Output triode
20.0
0.18
200
15.0
-
-
15.0
3.0
2.00
11.0
0.35
1000
B5
1
1931
H412 = RD4
RF or detector triode
4.0*
0.075
150
4.0
-
-
4.0
7.5
1.20
B4
1
1931
HD2
RF or detector triode
2.0*
0.07
0.08
150
200
1.0
5.0
-
 
-
 
3.0
5.0
24.0
15.0
0.70
1.00
B4
1
1929
1933
K420
Output triode
4.0*
0.30
200
26.0
-
-
16.0
2.5
2.00
3.0
1.0
B4
1
1931
K435/10
Output triode
4.0*
1.00
250
40.0
-
-
40.0
1.0
3.50
1.5
2.5
1000
B4
1
1931
K450/25
Output triode
4.0*
2.00
400
60.0
-
-
50.0
1.0
5.00
1.5
5.0
B4
1
1931
K450/40
Output triode
4.0*
2.00
800
50.0
-
-
140.0
1.0
5.00
1.5
12.0
B4
1
1931
K450/50
Output triode
4.0*
3.00
400
120.0
-
-
50.0
1.25
5.00
1.5
12.0
500
B4
1
1933
K480
Output triode
4.0*
2.00
550
45.0
-
-
36.0
2.5
8.00
3.0
5.0
800
B4
1
1933
M.D.4
Bi-grid tetrode
4.0*
0.07
20-80
0-20
0.25
B4
28
1927
O 202
Octode FC
2.0*
0.14
135
0.6
45
2.5
0/12
2.5M
0.25⅄
B7+tc
1
1935
O 406
Octode FC
4.0
0.65
250
1.3
70
3.0
1.5/25
1.6M
0.60⅄
B7+tc
2
1935
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
O 1307
Octode FC
13.0
0.20
200
0.80
70
3.0
1.5/25
1.5M
0.60⅄
B7+tc
Ct8+tc
2
2
1935
1935
P215
Output pentode
2.0*
0.25
150
10.0
150
2.5
15.0
40.0
1.50
10.0
0.5
B4+st
B5
26
6
1931
1934
P225
Output pentode
2.0*
0.20
150
2.0
150
2.0
4.5
15.0
0.5
B5
B4+st
6
26
1933
1935
P420
Output pentode
4.0*
0.15
200
13.0
150
2.5
13.5
2.00
9.5
0.75
1000
B5
6
1931
P425
Output pentode
4.0*
0.25
300
20.0
200
5.0
25.0
24.0
2.50
10.0
1.5
1000
B5
6
1931
P430
Output pentode
4.0*
1.00
400
25.0
200
3.5
35.0
20.0
3.00
10.0
3.0
1400
B5
6
1931
P435
Output pentode
4.0*
1.10
250
250
36.0
48.0
250
250
6.0
5.0
14.0
15.0
8.0
7.0
2.5
2.8
350
400
B5
6
1933
P440
Output pentode
4.0*
2.00
550
45.0
200
10.0
40.0
15.0
4.00
7.0
7.0
730
B5
6
1931
P440N
Output pentode
4.0
1.10
250
24.0
250
5.0
15.0
4.00
7.5
2.0
500
B5+st
B7
16
24
1932
1935
P441N
Output pentode
4.0
1.35
250
36.0
250
3.2
22.0
9.0
2.8
540
B7
24
1934
P460
Output pentode
4.0*
2.00
550
45.0
200
10.0
40.0
7.0
7.0
730
B5
6
1937
P495
Output pentode
4.0
1.50
250
32.0
250
3.0
6.0
8.0
3.5
175
B7
24
1935
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
P520
Output pentode (DC)
5.0*
0.10
150
10.0
150
2.0
13.5
30.0
2.00
10.0
0.55
B5
6
1931
P2020N
Output pentode
20.0
0.18
200
200
20.0
15.0
200
200
4.0
2.0
18.0
18.0
2.00
 
10.0
9.0
1.0
1.35
750
1000
B5+st
16
1931
1934
P2060
Output pentode
24.0
0.20
200
40.0
100
5.0
19.0
7.0
3.5
400
Ct8+tc
4
1935
P2460
Output pentode
24.0
0.18
200
40.0
100
5.0
19.0
7.5
3.5
400
B5+st
16
1934
P3580
Output pentode
35.0
0.20
250
36.0
250
4.5
4.5
4.0
320
B7
24
1936
R.D.4
General-purpose triode
4.0*
0.07
150
6.0
-
-
7.5
7.5
1.20
B4
1
1927
S201A
General-purpose triode
2.0*
0.10
-
-
B4
1
1927
S207
RF tetrode
2.0*
0.15
200
3.5
100
0.5
180.0
0.70
B4+tc
2
1932
S208
VM RF tetrode
2.0*
0.15
200
2.0
100
0.25
0/20
360.0
0.80
B4+tc
2
1932
S209
VM RF pentode
2.0*
0.05
135
2.0
135
0.6
0.5/15
1M
0.65
B7+tc
4
1935
S210
RF pentode
2.0*
0.05
135
2.6
135
1.0
1M
0.80
B7+tc
4
1935
S213
VM RF tetrode
2.0*
0.18
150
4.0
75
0.3
0.5/12
350.0
1.50
B4+tc
2
1935
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
S215
RF tetrode
2.0*
0.18
150
2.75
90
0.5
333.0
1.50
B4+tc
2
1933
S217
VM RF pentode
2.0*
0.18
150
2.5
150
0.5
0.5/16
500.0
1.70
B7+tc
4
1935
S218
RF pentode
2.0*
0.18
150
3.0
150
1.0
550.0
1.85
B7+tc
4
1935
S408
RF tetrode
4.0*
0.075
200
0.80
B4+tc
2
S409
RF tetrode (DC)
4.0*
0.10
200
4.0
200
350.0
0.90
B4+tc
2
1932
S410N
RF tetrode
4.0
1.00
200
200
4.0
3.0
60
100
1.0
0.50
 
2.0
400.0
450.0
1.00
2.00
B5+tc
2
1932
1938
S412N
RF tetrode
4.0
1.00
200
1.5
100
400.0
1.20
B5+tc
2
1932
S415N
VM RF tetrode
4.0
1.10
200
3.0
100
1.0
1.5/40
350.0
1.20
B5+tc
2
1932
S420
VM RF pentode
4.0
0.65
250
11.5
250
3.0
B7+tc
6
1938
S430N
RF tetrode
4.0
1.00
200
4.0
100
0.75
450.0
3.00
B5+tc
2
1932
S431N
VM RF tetrode
4.0
1.00
200
3.0
100
0.75
1/22
350.0
3.00
B5+tc
2
1932
S434N
VM RF pentode
4.0
1.10
200
4.5
100
0.01
1.5/35
1M
3.50
B5+tc
B7+tc
2
5
1933
1935
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
S435N
RF pentode
4.0
1.10
200
3.0
100
0.5
1.45M
3.50
B5+tc
B7+tc
2
5
1933
1935
S1323
VM RF pentode
13.0
0.20
200
4.5
100
1.0
2/22
1M
2.80
Ct8+tc
15
1935
S1324
RF pentode
13.0
0.20
250
3.0
100
1.0
2M
2.40
Ct8+tc
15
1937
S1328
RF tetrode
13.0
0.20
200
3.0
100
1.0
2.0
2M
2.40
Ct8+tc
15
1935
S2010N
RF tetrode
20.0
0.18
200
4.0
100
1.0
400.0
1.00
B5+tc
2
1931
S2030N
RF tetrode
20.0
0.18
200
3.0
100
0.75
450.0
3.00
B5+tc
2
1934
S2031N
VM RF tetrode
20.0
0.18
200
12.0
100
1.5/25
3.00
B5+tc
2
1932
S2034N
VM RF pentode
20.0
0.18
200
5.5
100
0.01
2/35
600.0
3.50
B5+tc
2
1933
S2035N
RF pentode
20.0
0.18
200
3.0
100
0.5
1.45M
3.50
B5
5
1933
S.C.2
RF tetrode
2.0*
0.15
200
4.5
75
300.0
0.70
B4+tc
2
1929
S.C.4
RF tetrode
4.0*
0.07
200
2.5
75
300.0
0.80
B4+tc
2
1929
S.C.G.4
RF tetrode (DC)
4.0*
0.10
200
4.0
75
350.0
1.00
B4+tc
2
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
S.C.N.4
RF tetrode
4.0
0.90
200
100
1.20
B5+tc
2
1929
S.D.2, S.D.2M
Detector triode
2.0*
0.14
0.10
150
150
4.0
4.0
-
 
-
 
3.0
4.5
10.4
12.0
2.00
1.40
B4
1
1929
1933
S.D.4
Detector triode
4.0*
0.14
150
4.5
-
-
3.0
9.1
2.00
B4
1
1927
S.G.4
Detector triode (DC)
4.0*
0.10
150
-
-
3.5
5.0
2.00
B4
1
1927
S.N.4
RF or detector triode
4.0
0.90
150
7.0
-
-
3.5
8.0
2.75
B5
1
1929
SP2
Output triode
2.0*
0.33
189
17.5
-
-
33.0
2.0
2.00
3.5
0.50
B4
1
1930
T.10
Triode
-
-
B4
1
TD2
Detector or AF triode
2.0*
0.07
0.08
0.10
150
150
150
3.5
7.0
5.0
-
 
 
-
 
 
6.0
7.0
6.0
14.4
10.0
8.0
0.75
0.90
1.25
B4
1
1927
1931
1938
TH401
Triode hexode FC
4.0
1.45
250
3.5
150
2.0
0.75⅄
B7+tc
3
1938
TS4
General-purpose triode
3.4-3.7*
0.06
20-50
-
-
18.0
0.50
B4
1
1926
U.D.2
Output triode
2.0*
0.22
180
150
15.0
15.0
-
 
-
 
22.0
15.0
3.0
2.7
1.80
2.00
7.0
5.0
0.27
0.50
B4
1
1927
1933
U.D.4
Output triode
4.0*
0.10
150
11.0
-
-
19.0
3.3
1.45
7.5
0.20
B4
1
1927
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
W213
General-purpose triode
2.0*
0.10
150
1.0
-
-
2.5
22.0
1.30
B4
1
1935
W412
RCC triode
4.0*
0.075
200
2.5
-
-
3.0
21.0
1.20
B4
1
1931
W415N
General-purpose triode
4.0
0.90
200
2.5
-
-
3.0
23.0
1.50
B5
1
1931
W420
RCC triode (d.c.)
4.0*
0.10
200
4.0
-
-
4.5
20.0
2.00
B4
1
1931
W.D.2
RCC triode
2.0*
0.07
0.08
150
200
1.0
1.0
-
 
-
 
1.0
2.5
67.0
37.5
0.65
1.00
B4
1
1927
1933
W.D.4
RCC triode
4.0*
0.07
200
2.0
-
-
2.0
40.0
1.00
B4
1
1927
WG4
RCC triode (d.c.)
4.0*
0.10
200
2.0
-
-
2.5
32.0
1.20
B4
1
1927
W.N.4
RCC triode
4.0
0.90
200
2.0
-
-
2.0
34.0
1.50
B5
1
1929
X.D.4
Output triode
4.0*
0.15
180
17.0
-
-
18.0
2.4
2.50
6.0
0.35
B4
1
1929
Y.D 02
Output triode
2.0*
0.22
150
12.0
-
-
7.5
4.5
2.00
10.0
0.35
B4
1
1936
Y.D.2
Output triode
2.0*
0.22
200
200
10.5
15.0
-
 
-
 
15.0
11.0
3.4
4.5
2.50
2.00
12.5
10.0
0.30
0.35
B4
1
1930
1932
Y.D.4
Output triode
4.0*
0.14
200
10.5
-
-
13.5
4.75
2.00
13.5
0.27
B4
1
1927
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
Y.G.5
Output triode (DC)
5.0*
0.07
180
7.5
-
-
12.0
5.8
1.20
12.5
0.18
B4
1
1927
Y.G.6
Output triode (DC)
6.0*
0.10
200
10.0
-
-
13.0
4.5
2.00
13.0
0.27
B4
1
1927
Y.N.4
AF triode
4.0
0.90
180
15.0
-
-
9.0
4.8
2.50
11.0
0.30
B5
1
1929
Z.D.2
Output triode
2.0*
0.14
0.15
150
150
10.0
10.0
-
 
-
 
15.0
15.0
6.2
5.0
1.00
1.00
14.5
13.0
0.14
0.15
B4
1
1927
1932
Z.D.4
Output triode
4.0*
0.15
120
18.0
-
-
10.0
2.5
1.80
B4
1
1927

 

Rectifiers

Type
Class
Cathode
Va
DC Ia
PIV
DC Vo
Base
Year
 
 
Type
Volts
Amps
Max RMS
mA
Volts
Volts
Type
Ref
Year

 Triotron

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
G429
HW
DH
4.0
0.30
250
30
B4
4
1931
G431
FW
DH
4.0
0.60
250
30
B4
5
1931
G470
FW
DH
4.0
1.00
300
75
B4
5
1931
G2080
HW
IH
20.0
0.20
250
80
B5
Ct8
8
5
1935
1936
G3060
2 x HW
IH
30.0
0.20
2 x 125
120
Ct8
6
1935
G3070
HW
IH
30.0
0.18
250
70
B5
8
1934
G3412
2 x HW
IH
33.0
0.18
250
120
B7
12
1934
G4100
HW
DH
4.0
2.00
750
100
B4
4
1931
G4110
FW
DH
4.0
2.00
250
120
B4
5
1935
G4120
FW
DH
4.0
2.00
500
120
B4
5
1931
G4120N
FW
IH
4.0
2.50
500
120
B4
14
1934
G4150
HW
DH
4.0
3.00
750
150
B4
4
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
G.A.24
FW
DH
4.0
0.90
250
60
B4
5
1929
G.D.24
FW
DH
B4
5
1929
G.N.14
HW
DH
4.0
0.25
250
30
B4
4
1929
G.N.24
FW
DH
4.0
0.25
250
30
B4
5
1929

 

Barretters

Type
Current
Voltage
Base
Year
 
Amps
Min-Max
Type
Ref
Year

 Triotron

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
V60
0.10
40-80
1931

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