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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.

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
mA/V
Watts
Ω
Type
Ref
 

Emitron

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
1S5
Diode & RF pentode
1.4*
0.05
67.5
1.6
67.5
0.4
0
600.0
0.625
B7G
5
1T4
VM RF pentode
1.4*
0.05
90.0
3.5
67.5
1.4
0/16
500.0
0.90
B7G
2
3A4
Output beam tetrode
1.4*
0.20*
150
13.3
90.0
3.2
8.4
100.0
1.90
8.0
0.7
B7G
7
3S4
Output beam tetrode
1.4*
0.10*
90
7.4
67.5
1.4
7.0
100.0
1.58
8.0
0.27
B7G
6
6AL5
Double diode
6.3
0.30
150
9.0
B7G
18
6AM5
Output pentode
6.2
0.20
250
16.0
250
2.4
13.5
130.0
2.60
16.0
1.4
730
B7G
25
6AM6
RF pentode
6.3
0.30
250
10.0
250
2.50
2.0
1M
7.5
B7G
21
6AQ5
Output beam tetrode
6.3
0.45
250
45.0
250
4.5
12.5
52.0
4.10
5.0
4.5
240
B7G
27
6AT6
Double diode triode
6.3
0.30
250
1.0
-
-
3.0
58.0
1.20
B7G
19
6BA6
RF pentode
6.3
0.30
250
11.0
100
4.2
1.0
1M
4.4
B7G
16
6BE6
Heptode frequency changer
6.3
0.30
250
3.0
100
7.1
1.5
1M
0.475⅄
B7G
29
6L6G
Output beam tetrode
6.3
0.90
350
54.0
250
2.5
18.0
33.0
5.20
4.2
10.8
300
IO
36
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
7B7
VM RF pentode
6.3
0.15
250
8.5
100
1.7
3.0
750.0
1.75
B8G
3
7C5
Output beam tetrode
6.3
0.45
250
45.0
250
4.5
12.5
52.0
4.1
5.0
4.5
250
B8G
10
7C6
Double diode triode
6.3
0.15
250
1.3
-
-
1.0
100.0
1.00
B8G
2
7H7
VM RF pentode
63
0.30
250
10.0
150
3.2
2.4
800.0
4.20
B8G
13
7S7
Triode heptode frequency changer
6.3
0.30
h250
t100
1.8
100
3.0
2.0
1,25M
0.525⅄
B8G
8
14S7
Triode heptode frequency changer
12.6
0.15
h250
t100
1.8
100
3.0
5.0
2.0
1,25M
0.525⅄
B8G
8
19X3
See Mullard PY80
-
-
185BT
Line t/b beam tetrode
18.0
4.50
180
180
140
IO
38
185BTA
Line t/b beam tetrode
18.0
0.45
180
180
140
IO
38

Rectifiers

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

 Emitron

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
6X4
FW
IH
6.3
0.60
325
70
B7G
31
6W2
EHT
IH
6.3
90mA
0.5
25kV
Wires
7Y4 = U149
FW
IH
6.3
0.50
325
70
B8G
1
17Z3 = PY81
ED
IH
17.0
0.30
150
4,500
B9A+tc
34
19X3/PY80
ED
IH
19.0
0.30
180
4,000
B9A
18
19Y3
HW
IH
19.0
0.30
250
180
B9A
18
27SU
HW
IH
13.2
0.90*
250
250
IO
106
35Z3
HW
IH
35.0
0.15
250
100
B8G
16
45IU
FW
IH
4.0
3.5
500
250
B4
14
52KU
FW
IH
5.0
2.00
500
150
IO
62
53KU
FW
IH
5.0
2.80
500
250
IO
62
SU25
EHT
IH
2.0
0.50
5,000
1.0
100kV
IO+tc
102
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
SU45
EHT
IH
4.0
0.50
2,500
30
5,400
B7G+tc
22
SU2150A
EHT
IH
2.0
1.50
5,000
10
10kV
B4+tc
17

Voltage Stabilisers

Type
AV Stab
Striking
Current mA
Regulation
Base
 
Volts
Voltage
Min
Max
Volts
Type
Ref

 Emitron

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
S130
120
180
6
75
3
B4
12
S130P
120
135'
5
75
7.5
B4
12

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