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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.

 

Triode Receiver Valves (pre-1926)*

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
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.

Mullard

D.06 (2 gn. rings
D
3.0
0.06
30-100
4.5
17.0
0.41
7.0
1924
B4
AF amplifier
D.06 (2 red rings)
D
3.0
0.06
50-125
60.0
0.28
17.0
1924
B4
RF amp./det./RCC amp.
D.06 (2 wh. rings)
D
3.0
0.06
30-100
4.5
17.0
0.41
7.0
1925
B4
AF amplifier
D.3 (2 gn. rings)
D
2.0
0.30
30-100
4.5
17.0
0.41
7.0
1924
B4
AF amplifier
D.3 (2 red rings)
D
2.0
0.30
50-125
60.0
0.28
17.0
1924
B4
RF amp./det./RCC amp.
D.3 (2 wh. rings)
D
2.0
0.30
30-100
4.5
17.0
0.41
7.0
1925
B4
AF amplifier
D.F.A.0
D
3.5
0.35
50-100
5.0
7.0
0.70
4.9
1924
B4
Output
D.F.A.1
D
5.5
0.20
50-100
4.5
5.5
1.00
5.5
1924
B4
Output
D.F.A.2
D
3.5
0.20
50-100
5.0
7.0
0.70
4.9
1924
B4
Output
D.F.A.3
D
5.5
0.06
50-100
4.0
13.0
0.60
7.6
1924
B4
Output
D.F.A.4
D
5.5
0.20
50-125
3.0
27.0
0.75
20.0
1924
B4
RCC amplifier
D.F.A.6
D
5.0
0.85
400
30.0
4.5
1.45
6.4
1925
B4
Output
D.F.ORA
D
2.0-3.0
0.06
20-100
4.0
12.0
0.33
4.0
1924
B4
General purpose
H.F. (red ring)
B
4.0
0.60
30-90
40.0
0.24
9.8
1924
B4
RF amplifier
K.A.
B
3.3
0.60
20-50
40.0
0.19
7.6
1920
B4
General purpose
K.B.
B
3.3
0.60
20-50
40.0
0.19
7.6
1920
I/S1
GP. Low-capacity
L.F. (green ring)
B
4.0
0.60
30-90
2.5
30.0
0.28
8.4
1924
B4
AF amplifier
L.F.B.1
D
2.0
0.25
50
0.25
1923
B4
General purpose
L.F. ORA-B
D
1.4-1.8
0.30
20-50
22.0
0.23
5.0
1923
B4
Both general purpose.
L.F. ORA-C
D
1.3-1.6
0.40
20-50
22.0
0.23
5.0
1923
B4
I/S2 base as option
One Volt ORA
O
0.8-1.1
0.25
30-75
3.0
45.0
0.18
8.3
1924
B4
RF amp./detector
ORA-A
B
3.8
0.65
30-90
27.0
0.32
8.5
1922
B4
Replaced K.A
ORA-B
B
3.8
0.65
30-90
27.0
0.32
8.5
1922
I/S1
Replaced K.B
P.A.1
B
6.0
1.50
200-400
7-16
8.5
0.88
7.5
1924
B4
Output
P.A.2
B
5.5
0.85
100-200
7-12
7.0
0.57
4.0
1924
B4
Output
P.A.3
B
4.0
0.75
70-120
5-10
10.0
0.40
4.0
1924
B4
Output
P.M.4
O
4.0
0.10
150
10.5
4.4
1.80
8.0
1925
B4
Output
R.A.
B
3.6-4.0
0.70
50-100
0-6
28.0
0.25
7.0
1921Ω
B4
Similar to R
S.3
B
3.6
0.65
15-50
0-4
24.0
0.17
4.0
1924Ω
4C/1
Osc. Low-capacity
S.4
B
3.6
0.65
1924Ω
4C/1
Special. Superseded by S.5Ω
S.5
B
3.6
0.65
20-50
0
200.0
0.25
50.0
1924Ω
4C/1
Equiv. to type Q
S.6
D
3.0
0.20
20-100
100.0
0.22
22.0
1925
4C/1
RCC amplifier
Wecovalve-A
O
0.8-1.1
0.25
20-50
2.0
18.0
0.26
4.7
1923
Peanut
General purpose
Wecovalve-B
O
0.8-1.1
0.25
20-50
2.0
18.0
0.26
4.7
1924
B4
General purpose

 

Four-electrode Valves (Bi-grid)

Type or
Trademark
Filament
Anode (8)The anode and inner grid were usually supplied with the same voltage.
Outer Grid (9)The outer grid is equivalent to the control grid of the triode valve.
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
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.
 

 Mullard

D.E.D.G.
D
2.0
0.4
12.0
4.2
1927
B4 + FL
D.G.
B
3.4-3.8
0.65
0-30
2-8
12.0
4.2
1924
B4 + FL

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
 

 Mullard

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
1A7G
Heptode FC
1.4*
50mA
90
0.6
45
0.7
60.0
0.25⅄
IO+tc
76
1C5G/GT
Output pentode
1.4*
0.10
90
7.8
90
3.5
7.5
115.0
1.55
8.0
0.24
IO
87
1H5G
Diode & high-μ triode
1.4*
50mA
90
0.15
-
-
0
240.0
0.275
IO+tc
91
1N5G
RF pentode
1.4*
50mA
90
1.2
90
0.30
0
1.5MΩ
0.75
IO+tc
77
2D2
Double diode (IH)
2.0
90mA
90
0.5
-
-
-
-
-
B5
3
1936
2D4
Double diode
4.0
0.65
200
0.8
-
-
-
-
-
B5+tc
17
1934
2D4A
Double diode
4.0
0.65
140
0.8
-
-
-
-
-
B5
3
1934
2D4B
Double diode (separate cathodes)
4.0
0.35
140
0.8
-
-
-
-
-
B7
21
1937
2D13
Double diode
13.0
0.20
200
0.8
-
-
-
-
-
Ct5+tc
2
1934
2D13A
Double diode
13.0
0.20
200
0.8
-
-
-
-
-
Ct5
1
1935
2D13C
Double diode
13.0
0.20
200
0.8
-
-
-
-
-
B5
3
1935
3Q5GT
Output beam tetrode
1.4*
0.15*
110
10.0
110
1.4
6.6
100.0
2.20
8.0
0.4
IO
85
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6A7
Heptode FC
6.3
0.30
mix250
osc100
3.5
9.5
100
2.7
3.0
360.0
0.55⅄
USM7 +tc
1
6A8G/GT
Heptode FC
6.3
0.30
mix250
osc100
3.5
9.5
100
2.7
3.0
360.0
0.55⅄
IO+tc
1
6AL5
Double diode
6.3
0.30
117
9.0
-
-
-
-
-
B7G
18
6AS6
Dual control pentode for switching, gating control or FC
6.3
0.175
120
5.5
120
3.5
2.0
3.50
B7G
32
6C5GT
Medium-μ triode
6.3
0.30
250
8.0
-
-
8.0
10.0
2.00
IO
20
6F6G
Output pentode
6.3
0.70
285
38.0
285
12.0
22.0
78.0
2.55
7.0
4.5
440
IO
36
6J5G/GT
Medium-μ triode
6.3
0.30
250
9.0
-
-
8.0
7.70
2.60
IO
20
6J7G/GT
RF pentode
6.3
0.30
250
2.0
100
0.50
5.0
1.5MΩ
1.25
IO+tc
8
6K7G/GT
VM RF pentode
6.3
0.30
250
10.5
125
2.6
3.0
600.0
1.65
IO+tc
8
6K8G/GT
Triode hexode FC
6.3
0.30
mix250
osc100
2.5
3.8
100
6.0
3.0
600.0
0.36⅄
IO+tc
4
6L6G
Output beam tetrode
6.3
0.90
315
3.0
225
6.0
13
77.0
3.75
8.5
5.5
315
IO
36
6N7GT
Class B double triode Class B amplifier
6.3
0.80
250
300
3.0
35.0
-
-
5.0
0
23.0
1.60

8.0

10.0
IO
22
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
6Q7G/GT
Double diode triode
6.3
0.30
250
1.0
-
-
3.0
58.0
1.20
IO+tc
29
6SK7GT
VM RF pentode
6.3
0.30
250
9.2
100
2.6
3.0
800.0
2.00
IO
10
6SN7GT
Medium-μ double triode
6.3
0.60
250
9.0
8.0
7.7
2.60
IO
26
6V6G
Output beam tetrode
6.3
0.45
315
35.0
225
6.0
13.0
77.0
3.75
8.5
5.5
315
IO
36
12A6G
Output beam tetrode
12.6
0.15
250
30.0
250
3.5
12.5
70.0
3.0
IO
36
12J7GT
RF pentode
12.6
0.15
250
2.0
100
0.50
5.0
1.5MΩ
1.25
IO+tc
8
12K7GT
VM RF pentode
12.6
0.15
250
10.5
125
2.6
3.0
600.0
1.65
IO+tc
8
12K8GT
Triode hexode FC
12.6
0.15
mix250
osc100
2.5
3.8
100
6.0
3.0
600.0
0.36⅄
IO+tc
4
12L6GT
Output beam tetrode
25.0
0.30
200
55.0
110
7.0
8.0
30.0
9.5
3.0
4.3
160
IO
36
12Q7GT
Double diode triode
12.6
0.15
250
1.0
-
-
3.0
58.0
1.20
IO+tc
29
12SK7GT
VM RF pentode
12.6
0.15
250
9.2
100
2.6
3.0
800.0
2.00
IO
10
12SN7GT
Medium-μ double triode
12.6
0.30
250
9.0
8.0
7.7
2.60
IO
26
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
25A6G
Output pentode
25.0
0.30
160
36.0
120
12.0
18.0
42.0
2.40
5.0
2.2
450
IO
36
25L6GT
Output beam tetrode
25.0
0.30
200
55.0
110
7.0
8.0
30.0
9.5
3.0
4.3
160
IO
36
35L6GT
Output beam tetrode
35.0
0.15
200
43.0
200
2.0
8.0
34.0
6.10
5.0
3.0
180
IO
36
42
Output pentode
6.3
0.70
285
38.0
285
12.0
22.0
78.0
2.55
7.0
4.5
440
USM6
8
43
Output pentode
25.0
0.30
160
36.0
120
12.0
18.0
42.0
2.40
5.0
2.2
450
USM6
8
50L6GT
Output beam tetrode
50.0
0.15
250
55.0
110
7.0
8.0
30.0
9.50
3.0
4.2
160
IO
36
054V
Output triode
4.0
1.00
200
30.0
-
-
28.0
1.25
4.00
4.0
1.0
B5
1
1931
75
Double diode triode
6.3
0.30
250
0.90
-
-
2.0
91.0
1.10
USS6+tc
4
78
VM RF pentode
6.3
0.30
250
10.5
125
2.6
3.0
600.0
1.65
USS6+tc
2
104V
Output triode
4.0
1.00
200
20.0
-
-
11.0
3.0
4.00
6.0
0.55
B5
A
1929
152T
Output triode
2.5
1.50
150
-
-
B4+st
25
1929
154V
AF triode
4.0
0.65
200
9.0
-
-
6.0
7.5
2.00
B4+st
25
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
164V
AF triode
(Improved version)
(further improved)
4.0
1.00
1.00
0.65
200
200
200
8.0
8.5
12.0
-

-

8.5
8.5
9.0
6.65
4.85
4.7
2.40
3.30
3.40
B5
1
1929
1930
1935
244V
Detector or AF triode
(Improved version)
4.0
1.00
0.65
200
200
5.5
5.5
-
-
3.3
5.6
9.0
9.3
2.80
2.75
B5
1
1933
1935
354V
Detector or AF triode
(Improved version)
(further improved)
4.0
1.00
1.00
0.65
180
200
250
4.5
4.0
6.5
-

-

3.0
4.0
4.5
14.0
12.0
11.5
2.50
3.00
3.50
B5
1
1929
1930
1935
484V
Detector triode
4.0
1.00
200
2.8
-
-
3.0
21.8
2.20
B5
1
1935
904V
Detector or AF triode
(Improved version)
4.0
1.00
0.65
200
200
1.8
2.0
-
-
2.0
2.0
34.0
36.0
2.20
2.00
B5
1
1931
1935
994V
Detector or RCC triode
4.0
0.65
200
1.35
-
-
1.5
33.0
3.60
B5
1
1935
4671
Acorn UHF triode
6.3
0.15
180
4.5
-
-
5.0
12.5
2.00
5AA
1
1940
4672
Acorn UHF pentode
6.3
0.15
250
2.0
100
0.7
3.0
1.5M
1.40
7AA
1
1940
5636 (SQ)
See EF730
-
-
5718 (SQ)
UHF oscillator triode
6.3
0.15
100
8.5
-
-
1.25
4.7
5.80
B8D/F
16
5840 (SQ)
See EF732
-
-
5899 (SQ)
See EF731
-
-
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
5902 (SQ)
See EL71
-
-
6021 (SQ)
See ECC70
-
-
6080 (SQ)
Double power triode
6.3
2.5
100
100.0
300Ω
6.5
300
IO
145
6153T
Triode hexode for television
6.3
0.95
h250
t100
12.7
16.0
100
2.0
2.0
3.00
3.80
Ct8
34
1939
6205 (SQ)
See EF734
7.0
0.20
-
-
AC 042
Output triode
2.0*
2.00
300
50.0
-
-
38.0
1.2
5.00
2.3
3.5
B4
1
1937
AC 044
Output triode
(Improved version)
(further improved)
4.0*
0.70
1.00
1.00
200
250
300
30.0
48.0
50.0
-

-

32.0
20.0
38.0
1.15

1.2
3.50
6.80
5.00
2.5
2.5
2.3
1.0
2.7
3.5

 950
760
B4
1
1930
 1933
AC 054
Output triode

(Class AB push-pull)
4.0*
1.00
250
500
500
48.0
24.0
20.0
-

-

22.0
68.0
70.0
1.7

3.50

1.6
11.5
12.0
1.5
5.3
15.0


-
B4
1
1930
AC 064
Output triode
4.0*
1.00
200
20.0
-
-
21.0
2.0
3.00
5.0
0.62
B4
1
1930
AC 084
Output triode
4.0*
1.00
300
17.0
-
-
22.0
7.3
1.10
B4
1
1930
AC 084N
Output triode
4.0*
1.00
100
21.0
-
-
0
2.8
2.50
4.0
B4
1
1930
AC 104
Output triode
4.0*
1.00
200
11.0
-
-
14.0
2.85
3.50
6.0
0.4
B4
1
1930
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
AL60
Output pentode
(Push-pull)
4.0
2.10
250
250
72.0
45.0
250
250
8.0
5.1
7.0
20.0
14.50
3.5
5.0
8.0
14.5

90
B7+tc
5
WW2
AP4
Acorn UHF pentode
4.0
0.20
250
2.0
100
0.7
3.0
3.5M
1.40
7AA
1
1936
AT4
Acorn UHF triode
4.0
0.25
200
4.5
-
-
6.0
12.5
2.00
5AA
1
1936
CBL1
Double diode output pentode
44.0
0.20
200
45.0
200
6.0
8.5
35.0
8.00
4.50
4.0
167
Ct8+tc
13
1939
CBL31
Double diode output pentode
44.0
0.20
200
45.0
200
6.0
8.5
35.0
8.00
4.50
4.0
167
IO+tc
15
1938
CCH35
Triode hexode FC
7.0
0.20
h250
t100
3.0
3.3
100
3.0
2.0
1.3M
0.65⅄
2.80
IO+tc
3
1940
CL4
Output pentode
33.0
0.20
200
45.0
200
6.0
8.5
35.0
8.00
4.50
4.0
167
Ct8+tc
4
1938
CL6 (replaced by CL4)
Output pentode
(Class AB1 push-pull)
35.0
0.20
200
250
45.0
36.0
100
125
5.5
12.5
9.5
19.0
8.00
4.50
7.00
4.0
13.5

180
Ct8+tc
4
1938
CL30/20P4
Line scan output beam tetrode
38.0
0.20
400
250
IO
38
CL33
Output pentode
33.0
0.20
200
45.0
200
6.0
8.5
35.0
8.00
4.50
4.0
167
IO
36
1940
DA1
Miniature triode
2.0*
50mA
40
0.25
-
-
0.25
80.0
0.40
Sm4
1
1936
DA2
Miniature output triode
2.0*
50mA
40
1.25
-
-
2.15
13.6
0.50
Sm4
1
1936
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
DA3
Miniature output triode
2.0*
50mA
40
1.8
-
-
2.8
7.6
0.62
Sm4
1
1936
DA90
Single diode
1.4*
0.15
117
0.50
-
-
-
-
-
B7G
13
DAC1
Single diode triode
1.4*
50mA
90
0.14
-
-
0
240.0
0.275
Ct8+tc
32
1939
DAC31
Single diode triode
1.4*
25mA
120
0.75
-
-
0
100.0
0.40
IO+tc
91
PW
DAC32
Single diode triode
1.4*
50mA
90
0.15
-
-
0
240.0
0.275
IO+tc
91
PW
DAF70
Single diode pentode
1.25*
25mA
67.5
1.0
67.5
0.25
0
400.0
0.44
B8D/F
1
DAF91
Diode AF pentode
1.4*
50mA
90
2.7
90
0.63
0
500.0
0.72
B7G
5
DAF96
Diode AF pentode
1.4*
25mA
25mA
67.5
0.17
67.5
1.5
0.17
B7G
5
DAL5
Double diode
6.3
0.30
17
9.0
-
-
-
-
-
B7G
18
DAS1
AF tetrode (deaf aid)
2.0*
60mA
120
1.5
60
2.7
500.0
0.58
Sm4+tc
2
1938
DB1
Miniature triode
1.5*
70mA
40
0.25
-
-
0.25
80.0
0.40
Sm4
1
1939
DB3
Miniature triode
1.5*
70mA
40
1.8
-
-
2.8
7.6
0.62
Sm4
1
1939
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
DBC31
Double diode triode
1.4*
50mA
120
1.6
-
-
1.5
28.0
0.90
IO+tc
88
PW
DBS1
Miniature tetrode
1.5*
70mA
120
1.5
60
2.7
500.0
0.58
Sm4+tc
2
1939
DC51
Triode (deaf aid)
1.5*
67mA
45
0.34
-
-
0
66.0
0.38
Sm4
1
1939
DCC90
RF double triode
1.4*
0.22*
90
3.7
2.5
8.3
1.80
B7G
8
DD51
Output triode (deaf aid)
1.5*
67mA
45
1.7
-
-
3.0
10.0
0.50
Sm4
1
1939
DF1
VM RF pentode
1.4*
50mA
90
1.2
90
0.3
0/4
1.5M
0.75
Ct8+tc
26
1939
DF31
Pentode
1.4*
25mA
90
1.2
90
0.25
0
2M
0.70
IO+tc
85
PW
DF32
VM pentode
1.4*
50mA
90
1.4
90
0.3
1.5
1.5M
1.10
IO+tc
85
PW
DF33
VM pentode
1.4*
50mA
90
1.2
90
0.3
0/4
1.5M
0.75
IO+tc
77
PW
DF51
Pentode (deaf aid)
1.5*
67mA
45
0.13
13.5
0
0.17
Sm4+tc
2
1939
DF61
Submin. AF pentode
1.25*
25mA
67.5
1.7
67.5
0.45
0
1.6MΩ
0.95
B5A
3
DF62
Submin. AF pentode
1.25*
0.10
45
3.0
45
0.80
0
50.0
2.0
B5A
2
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
DF64
Submin. AF pentode
0.62*
10mA
15
50mA
15
17mA
0.75
1.2MΩ
0.09
B5A
3
DF66
Submin. AF pentode
0.625*
15mA
22.5
50mA
22.5
15mA
1.05
2.0MΩ
0.10
B5A
1
DF70
RF pentode
0.625*
25mA
30
0.375
30
0.125
0
500.0
0.22
B8D/F
6
DF72
RF pentode
1.25*
25mA
67.5
1.7
67.5
0.5
0
750.0
1.0
B8D/F
2
DF73
VM RF pentode
1.25*
25mA
67.5
1.7
67.5
0.5
0
800.0
0.8
B8D/F
2
DF91
VM RF pentode
1.4*
50mA
90
3.5
67.5
1.4
0
500.0
0.9
B7G
2
DF92
RF pentode
1.4*
50mA
90
3.7
90
1.4
0
500.0
1.0
B7G
2
DF96
IF pentode
1.4*
25mA
85
1.65
64
0.55
0
1MΩ
0.85
B7G
2
DF97
VM RF pentode
1.4*
25mA
85
1.7
62
0.70
0
450.0
0.94
B7G
59
DFA 0
Output triode
3.5*
0.35
100
-
-
8.0
7.0
0.70
B4
1
1924
DFA 1
Output triode
5.5*
0.25
100
-
-
7.0
5.5
1.00
B4
1
1924
DFA 2
Output triode
3.5*
0.25
100
-
-
8.0
7.0
0.70
B4
1
1924
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
DFA 3
Output triode
5.5*
60mA
100
-
-
6.0
13.0
0.60
B4
1
1925
DFA 4
AF triode
5.5*
60mA
100
-
-
4.5
27.0
0.75
B4
1
1925
DFA 6
Output triode
4.5*
0.85
400
26.0
-
-
30.0
4.5
1.45
1.0
B4
1
1925
DFA 7
Output triode
4.5*
0.85
400
25.0
-
-
150.0
2.85
0.85
1.0
B4
1
1927
DFA 8
AF triode
4.5*
0.85
400
9.0
-
-
7.5
15.0
1.30
B4
1
1927
DFA 9
Output triode
6.0*
0.60
250
24.0
-
-
28.0
2.0
2.50
0.84
B4
1
1928
DK1
Heptode FC
1.4*
0.05
mix 90
osc 90
0.55
1.2
45
0.6
0
600.0
0.25⅄
Ct8+tc
31
1939
DK32
Heptode FC
1.4*
50mA
mix 90
osc 90
0.60
1.2
45
0.7
0
600.0
0.25⅄
IO+tc
76
PW
DK40
Octode FC
1.4*
50mA
mix90
osc65.5
1.0
2.6
67.5
0.25
0
1MΩ
0.425⅄
B8A
25
DK91
Heptode FC
1.4*
50mA
90
0.8
45
1.9
0/14
800.0
0.25⅄
B7G
3
DK92
Heptode FC
1.4*
50mA
mix85
osc30
0.7
1.4
60
0.15
0
650.0
0.325⅄
B7G
54
DK96
Heptode FC
1.4**
25mA
mix85
osc35
0.6
1.5
68
0.14
0
300.0
0.30⅄
B7G
54
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
DL1
Output pentode
1.4*
50mA
90
4.0
90
3.0
300.0
1.25
22.0
0.17
Ct8
25
1939
DL2
Output pentode
1.4*
0.10
90
7.5
90
1.6
7.5
115.0
1.55
8.0
0.24
Ct8
25
1939
DL31
Output pentode
1.4*
0.05
90
4.0
90
0.70
3.0
300.0
1.25
IO
78
PW
DL33
Output pentode
1.4*
2.8*
0.10
0.05
90
90
9.5
8.0
90
90
1.3
1.0
4.5
4.5
90.0
80.0
2.20
2.00
8.0
8.0
0.27
0.23
IO
87
PW
DL35
Output pentode
1.4*
0.10
90
7.5
90
1.6
7.5
115.0
1.55
8.0
0.24
IO
78
PW
DL51
Output pentode (hearing aid)
1.5*
0.134
45
1.6
45
0.23
1.5
85.0
1.50
Sm4+tc
2
1939
DL64
Submin output pentode
1.25*
10mA
15
0.16
15
0.04
1.5
400.0
0.18
100.0
9.5mW
B5A
3
DL66 = CV2106
Submin output pentode
1.25*
15mA
22.5
0.3
22.5
0.075
1.4
300.0
0.34
75.0
2.7mW
B5A
1
DL68
Submin output pentode
1.25*
25mA
22.5
0.6
22.5
0.15
2.2
100.0
0.43
37.0
5mW
B5A
1
DL69
Submin output pentode
1.25*
25mA
90
1.74
90
0.04
3.0
600.0
0.85
60.0
0.05
B5A
5
DL70
Output pentode
1.25*
0.11
135
7.5
90
1.5
7.5
150.0
1.90
16.0
0.5
B8D/F
6
DL71
Output pentode
1.25*
25mA
45
0.6
45
0.15
1.25
350.0
0.55
100.0
6.3mW
B8D/F
6
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
DL72
Output pentode
1.25*
25mA
45
1.25
45
0.4
4.5
170.0
0.55
30.0
20mW
B8D/F
6
DL73
Output pentode
1.25*
0.20
100
15.0
100
3.8
9.0
16.0
2.50
B8D/F
6
DL75
Output pentode
1.25*
25mA
90
1.75
90
0.4
2.5
450.0
0.85
60.0
50mW
B8D/F
6
DL91
Output pentode
1.4*
0.10
90
7.4
67.5
1.4
7.0
8.0
5.50
8.0
0.27
B7G
4
DL92
Output pentode
1.4*
0.10*
90
7.4
67.5
1.4
7.0
100.0
1.57
8.0
0.235
B7G
6
DL93
RF or output pentode
1.4*
0.2*
150
13.3
90
2.2
8.4
100.0
1.90
8.0
0.7
B7G
7
DL94
Output pentode
1.4*
0.10*
90
9.5
90
2.1
4.5
100.0
2.15
10.0
0.27
B7G
9
DL96
Output pentode
1.4*
50mA*
85
5.0
85
0.9
5.2
150.0
1.40
13.0
0.20
B7G
9
DL620
Output pentode
1.25*
50mA
67.5
3.25
67.5
1.0
6.5
110.0
0.65
15.0
8.5mW
B5A
1
DO 10
Output triode
6.0*
0.80
400
26.0
-
-
130.0
2.85
0.86
6.0
B4
1
1932
DO 20
Output triode
(Improved version)
7.5*
1.30
1.10
425
425
40.0
40.0
-
-
66.0
66.0
2.0
2.0
2.50
2.50
6.0
5.0
3.0
4.0
B4
1
1929
1931
DO 24
Output triode
4.0*
2.00
1.85
400
400
63.0
63.0
-
-
34.0
40.0
1.4
1.0
6.50
7.50
4.0
3.2
5.0
7.1
540
630
B4
1
1931
PW
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
DO 25
Output triode
(improved)
6.0*
1.80
1.10
400
400
63.0
63.0
-
-
95.0
112.0
1.15
800Ω
2.60
3.75
3.1
4.0
5.0
7.0

1780
B4
1
1930
1931
DO 26
Output triode
4.0*
2.00
400
63.0
-
-
92.0
950Ω
3.80
3.0
7.5
1500
B4
1
1933
DO 30
Output triode
(Class AB push-pull)
4.0*
2.00
500
500
60.0
50.0
-
-
134.0
145.0
580Ω
6.90
6.0
3.4
11.0
45.0
580
-
B4
1
1937
DO 60
Output triode
6.0*
4.00
500
120.0
-
-
95.0
1.0
3.50
1.5
10.0
790
L4
1
1930
DO 75
Output triode
10.0*
2.00
1000
75.0
-
-
55.0
2.0
6.00
6.0
18.0
735
Special
1931
DP425
Output triode
4.0*
0.25
150
-
-
3.3
1.10
B4
1
1926
E55L (SQ)
Wideband output pentode
6.3
0.30
125
50.0
125
5.5
3.0
20.0
45.0
0
B9D
4
E80CC (SQ)
Double triode
6.3
0.60*
250
6.0
-
-
-
7.0
27.0
920
B9A
1
E80CF (SQ)
Triode pentode
6.3
0.33
p170
t100
10.0
14.0
170
2.8
-
400.0
6.2
155
B9A
25
E80F (SQ)
AF pentode
6.3
0.30
250
3.0
100
0.65
-
1.5MΩ
1.85
550
B9A
23
E80L (SQ)
Output pentode Class A amp
6.3
0.70
250
24.0
250
3.3
-
10.0
2.8
270
B9A
36
E83F (SQ)
High slope pentode
6.3
0.30
210
10.0
120
2.1
-
500.0
9.0
165
B9A
96
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
E86C (SQ)
Triode
6.3
0.165
175
12.0
-
-
1.5
5.0
14.0
B7G
24
E88C (SQ)
UHF triode
6.3
0.155
160
12.5
-
-
1.25
5.2
13.5
B9A
75
E88CC (SQ) E88CC/01 (SQ)
Double triode
6.3
0.30
90
15.0
-
-
1.0
12.5
B9A
39
E90CC (SQ)
Double triode
6.3
0.40
100
8.5
-
-
2.1
4.5.
6.0
B7G
17
E92CC (SQ)
Double triode
6.3
0.40
120
8.5
-
-
1.7
7.5
6.0
0
B7G
17
E130L (SQ)
High slope output pentode
6.3
1.70
250
100.0
150
4.0
15.5
10.0
27.5
IO+tc
E180CC (SQ)
Double triode
6.3
0.40*
150
8.5
-
-
1.85
7.2
6.4
0
B9A
1
E180F (SQ)
High slope RF pentode
6.3
0.30
180
13.0
150
3.3
1.25
90.0
16.5
B9A
45
E182CC (SQ)
Double triode
6.3
0.64*
120
36.0
-
-
2.0
1.6
15.0
0
B9A
6
E186F (SQ)
High slope pentode
6.3
0.32
180
13.0
150
3.3
1.25
100.0
16.5
B9A
45
E188CC (SQ)
Double triode
6.3
0.335
90
15.0
-
-
1.2
2.6
12.5
B9A
39
E280F (SQ)
High slope pentode
6.3
0.315
180
20.0
150
6.0
1.6
100.0
26.0
B9A
45
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
E288CC (SQ)
Double RF triode
6.3
0.475
90
30.0
-
-
1.2
1.4
18.0
B9A
39
E810F (SQ)
Wideband RF pentode
6.3
0.34
120
35.0
150
5.0
1.9
42.0
50.0
B9A
90
E1180
Double power pentode Class AB1 push-pull
6.3
0.55
250
26.0
250
8.0
9.1
11.0
8.5
180
B9A
68
EA50
Single diode
6.3
0.15
50
5.0
-
-
-
-
B3G
1
1939
EA52
UHF diode
6.3
0.30
1kV max
-
-
-
-
-
-
Wires
-
EA53
UHF diode
6.3
0.30
1kV max
-
-
-
-
-
-
Coaxial
-
EA76
Sub-min diode
6.3
0.15
150
9.0
-
-
-
-
-
B5B/F
1
EAB1
Triple diode
6.3
0.20
140
0.8
-
-
-
-
-
Ct8
17
1938
EABC80
Triple diode triode
6.3
0.45
250
1.0
-
-
3.0
50.0
1.40
B9A
2
EAC91
Single diode triode
6.3
0.30
200
7.5
-
-
3.2
12.0
2.80
B7G
23
EAF41
Diode & VM RF pentode
6.3
0.20
250
5.0
110
1.0
2.0
1.4MΩ
2.0
B8A
11
EAF42
Diode & VM RF pentode
6.3
0.20
250
5.0
110
1.0
2.0
1.4MΩ
2.0
B8A
12
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EB4
Double diode
6.3
0.20
140
0.8
-
-
-
-
-
Ct8
10
1938
EB34
Double diode
6.3
0.20
140
0.8
-
-
-
-
-
IO
53
1941
EB41
Double diode
6.3
0.30
150
9.0
-
-
-
-
-
B8A
10
EB91
Double diode
6.3
0.30
150
9.0
-
-
-
-
-
B7G
18
1946
EBC3
Double diode triode
6.3
0.20
250
5.0
-
-
5.5
15.0
2.00
Ct8+tc
7
1938
EBC33
Double diode triode
6.3
0.20
250
5.0
-
-
5.5
15.0
2.00
IO+tc
29
1940
EBC41
Double diode triode
6.3
0.23
250
1.0
-
-
3.0
54.0
1.30
B8A
9
EBC81
Double diode triode
6.3
0.23
250
1.0
-
-
3.0
58.0
1.20
B9A
54
EBC90
Double diode triode
6.3
0.30
250
1.0
-
-
3.0
58.0
1.20
B7G
19
EBC91
Double diode triode
6.3
0.30
250
1.2
-
-
2.0
62.5
1.60
B7G
19
EBF2
Double diode RF pentode
6.3
0.20
250
5.0
100
1.6
2.0
1.5M
1.80
Ct8+tc
13
1938
EBF32
Double diode pentode
6.3
0.20
250
5.0
100
1.6
2.0
1.3M
1.80
IO+tc
15
PW
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EBF80
Double diode pentode
6.3
0.30
250
5.0
85
1.75
2/41.5
1.4MΩ
2.20
300
B9A
12
EBF83
Double diode VM RF pentode
6.3
0.30
12.6
0.45
12.6
0.14
1MΩ
1.0
B9A
12
EBF89
Double diode VM RF pentode for AM RX
6.3
0.30
250
9.0
100
2.7
2.0
1MΩ
3.80
B9A
12
EBL1
Double diode output pentode
6.3
1.20
250
36.0
250
5.0
6.0
55.0
9.50
7.0
4.3
146
Ct8+tc
13
1938
EBL21
Double diode output pentode
6.3
0.80
250
44.0
275
5.8
6.2
50.0
9.50
5.7
4.5
125
B8G
6
EBL31
Double diode output pentode
6.3
1.20
250
36.0
250
5.0
6.0
55.0
9.50
7.0
4.3
146
IO+tc
15
1940
EC31
Output triode
6.3
0.65
250
20.0
-
-
16.0
3.0
3.20
10.0
0.5
IO
20
PW
EC52 (was RL16)
UHF oscillator triode
6.3
0.43
250
10.0
-
-
9.2
6.50
B9G
3
1946
EC53 (was RL18)
UHF oscillator triode
6.3
0.25
200
7.5
-
-
3.3
11.4
2.90
B3G+2tp
2
1946
EC54 (was RL37)
Grounded grid triode
6.3
0.43
250
10.0
-
-
1.5
15.1
9.00
B9G
17
1946
EC71
Triode
6.3
0.15
100
8.5
-
-
1.25
4.7
5.80
B8D/F
16
EC86
UHF triode
6.3
0.15
100
8.5
-
-
1.25
4.7
5.8
B9A
74
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EC88
UHF triode
6.3
0.155
160
12.5
-
-
1.25
4.8
13.5
B9A
75
‡ Obtained with grid biasing resistor of 2.2MΩ.
EC90
RF power triode
6.3
0.15
250
10.5
8.5
7.70
2.20
5.5
B7G
15
EC91
Grounded grid triode
6.3
0.30
250
10.0
1.5
12.0
8.50
B7G
24
EC92
Grounded grid triode
6.3
0.15
250
10.0
2.0
11.0
5.50
B7G
66
EC97
RF triode
6.3
0.215
135
11.0
1.0
5.0
13.0
B7G
79
EC98
UHF triode
6.3
0.40
150
13.5
13.5
3.70
13.5
B7G
30
EC1000 (SQ)
VHF triode
6.3
0.185
80
14.0
1.9
14.5
B8D/F +tc
13
ECC31
Medium-μ double triode (common cathode)
6.3
0.95
250
6.0
4.6
14.0
2.30
IO
22
WW2
ECC32
Medium-μ double triode
6.3
0.95
250
6.0
4.6
14.0
2.30
IO
26
WW2
ECC33
Medium-μ double triode
6.3
0.40
250
9.0
4.0
9.7
3.60
IO
26
PW
ECC34
Low-μ double triode
6.3
0.95
250
10.0
16.0
5.2
2.20
IO
26
1946
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
ECC35
High-μ double triode
6.3
0.40
250
2.3
2.5
34.0
2.00
IO
26
PW
ECC40
Double triode
6.3
0.60
250
6.0
5.2
11.0
2.70
B8A
13
ECC70
Double triode
6.3
0.30
100
6.5
1.0
6.5
5.4
B8DF
15
ECC81
Double triode
6.3
0.30*
250
10.0
2.0
25.0
5.50
B9A
1
ECC82
Double triode
6.3
0.30*
250
10.5
8.5
7.7
2.20
B9A
1
ECC83
Double triode
6.3
0.30*
250
1.2
2.0
62.5
1.60
B9A
1
ECC84
Double triode
6.3
0.34
90
12.0
1.5
4.0
6.0
B9A
28
ECC85
RF double triode
6.3
0.435
250
10.0
2.7
9.0
6.1
B9A
39
ECC86
RF double triode
6.3
0.33
6.3
0.9
0.4
5.4
2.6
B9A
39
ECC88
VHF frame grid double triode for cascode amp
6.3
0.365
90
15.0
1.3
2.6
12.5
B9A
39
ECC91
VHF double triode
6.3
0.45
100
8.5
0.85
7.1
5.30
B7G
17
ECC189
VHF double triode
6.3
0.365
90
15.0
1.4
2.5
12.5
B9A
39
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
ECC804/6 - 30L2
Double triode
6.3
0.30
200
10.0
7.7
5.3
3.4
B9A
39
ECC2000 (SQ)
UHF double triode Cascode amplifier
6.3
0.335
i/p90
o/p90
15.0
15.0
-
-
2.0
1.8
12.0
16.0
B10B
2
ECF80
VHF triode pentode frequency changer
6.3
0.43
p250
t100
7.0
14.0
200
1.8
3.2
2.0
900.0
4.0
5.50
5.00
B9A
25
ECF82
Triode pentode frequency changer
6.3
0.45
p250
t150
5.2
18.0
117
1.9
0
1.0

5.0
1.9⅄
B9A
25
ECF86
Triode pentode frequency changer
6.3
0.39
p170
t100
10.0
14.0
50
3.3
1.2
3.0
>350.0
12.0
5.7
B9A
65
ECH2
Triode heptode frequency changer
6.3
0.95
h250
t100
3.25
9.5
100
6.0
2.5/30
1.5MΩ
0.75⅄
Ct8+tc
1
1938
ECH3
Triode hexode frequency changer
6.3
0.20
h250
t100
3.0
3.3
100
3.0
2.0/17
1.3MΩ
0.65⅄
2.8
Ct8+tc
1
1939
ECH21
Triode heptode frequency changer
6.3
0.33
mix250
osc250
3.0
4.5
150
6.2
2.0
1.4MΩ
20.0
0.75⅄
0.55
150
B8G
42
ECH33
Triode hexode frequency changer
6.3
0.20
h250
t100
3.0
3.3
100
3.0
2.0/17
1.3M
0.65⅄
2.80
IO+tc
3
1940
ECH35
Triode hexode frequency changer
6.3
0.30
h250
t100
3.0
3.3
100
3.0
2.0/17
1.3MΩ
8.6
0.65⅄
2.80
215
IO+tc
3
1940
ECH41
Triode hexode frequency changer
6.3
0.225
mix250
osc250
3.0
4.9
104
2.2
2/28
2MΩ
0.50⅄
0.55

33.0
200
B8A
3
ECH42
Triode hexode frequency changer
6.3
0.23
mix250
osc250
3.0
4.8
180
4.5
3.0
2/29
>1MΩ
0.75⅄
0.55

33.0
B8A
3
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
ECH81
Triode heptode frequency changer
6.3
0.30
mix250
osc250
2.5
92
5.5
2/28.5
1MΩ
0.70⅄
0.65

33.0
B9A
24
ECH83
Triode heptode frequency changer
6.3
0.30
mix25
osc2.6
0.46
0.75
25
1.25
0
0
1.1MΩ
47.0
0.39⅄
1.40
B9A
24
ECH84
Triode heptode FC Sync. Pulse generator
6.3
0.30
hep250
t135
1.7
3.0
14
0.9
0
2.20
3.70
B9A
77
ECL80
Triode & frame output pentode for TV
6.3
0.30
p200
t100
17.5
4.0
200
3.3
8.0
150.0
12.5
3.30
1.40
B9A
13
ECL82
Triode & output pentode
6.3
0.78
p250
t100
28.0
3.5
250
5.7
22.5
0
25.0
28.0
5.00
2.50
9.0
3.4
680
B9A
37
ECL83
Triode & output pentode
6.3
0.60
p200
t200
27.0
2.4
200
4.4
13.0
1.5
53.0
34.0
5.0
2.5
7.5
2.5
B9A
27
ECL86
AF triode & output pentode
6.3
0.66
p250
t250
37.0
1.2
250
10.0
-
1.9
-
62.0
-
1.20
7.0
4.0
170
B9A
76
ECL820
Line t/b output pentode
6.3
1.05
250
250
B9A
17
EE50
Secondary emission RF pentode
6.3
0.30
250
Vk2 150
10.0
250
0.6
3.0
2.5M
14.0
B9G
16
1938
EF183
Frame-grid VM RF pentode
6.3
0.30
230
10.5
90
3.6
2.1
650.0
10.6
B9A
10
EF184
Frame-grid RF pentode
6.3
0.30
200
10.0
200
4.1
2.5
380.0
15.0
B9A
10
EF2
VM RF pentode
6.3
0.40
250
4.5
100
1.4
2/22
1.4M
2.20
Ct8+tc
15
1939
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EF5
VM RF pentode
6.3
0.20
250
8.0
100
2.6
3/35
1.2M
1.70
Ct8+tc
15
1938
EF6
RF or AF pentode
6.3
0.20
250
3.0
100
1.1
2.0
2.5M
2.00
Ct8+tc
15
1938
EF8
Low-noise VM RF pentode (with 4th grid)
6.3
0.20
250
8.0
250
0.2
2.5/50
450.0
1.80
Ct8+tc
11
1938
EF9
VM RF pentode
6.3
0.20
250
6.0
100
1.7
2.5/40
1.25M
2.20
Ct8+tc
15
1938
EF22
VM RF pentode
6.3
0.20
250
6.0
100
1.7
2.5/46
1.2MΩ
2.0
325
B8G
3
EF36
RF or AF pentode
6.3
0.20
250
3.0
100
0.8
2.0
2.5M
1.80
IO+tc
8
1940
EF37
Low-microphony AF pentode
6.3
0.20
250
3.0
100
0.8
2.0
2.5M
1.80
IO+tc
8
1946
EF37A
Low microphony, low noise AF pentode
6.3
0.20
250
3.0
100
0.80
2.0
2.5MΩ
1.80
IO+tc
8
EF38
Low-noise VM RF pentode (with 4th grid)
6.3
0.20
250
8.0
250
0.2
2.5/50
450.0
1.80
IO+tc
66
1940
EF39
VM RF pentode
6.3
0.20
250
6.0
100
1.7
2.5/40
1.25M
2.20
325
IO+tc
8
1940
EF40
Voltage amplifier pentode
6.3
0.20
250
3.0
140
0.55
2.0
2.5MΩ
1.85
B8A
15
EF41
VM RF pentode
6.3
0.20
250
6.0
100
1.7
2.5/39
1MΩ
2.20
325
B8A
7
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EF42
High slope RF pentode
6.3
0.33
250
10.0
250
2.3
2.0
440.0
9.5
B8A
8
1947
EF50
VHF pentode
6.3
0.30
250
10.0
250
3.0
2.0
1M
6.50
B9G
1
1939
EF54 (was RL7)
VHF pentode
6.3
0.30
250
10.0
250
1.45
1.7
500.0
7.70
150
B9G
2
PW
EF55
Video frequency pentode
6.3
1.00
250
250
40.0
10.0
250
150
5.5
1.0
4.5
4.0
55.0
100.0
12.00
7.00
100
360
B9G
1
1946
EF70
RF pentode
6.3
0.20
100
3.0
100
2.25
2.0
100.0
2.5
B8D/F
3
EF71
VM RF pentode
6.3
0.15
100
7.2
100
2.2
1.2
260.0
4.5
B8D/F
4
EF72
RF pentode
6.3
0.15
100
7.0
100
2.2
1.4
250.0
5.0
B8D/F
4
EF73
RF pentode
6.3
0.20
100
7.5
100
2.5
2.0
250.0
5.25
B8D/F
5
EF74
RF pentode
6.3
0.20
100
7.0
100
2.4
1.4
200.0
3.1
B8D/F
5
EF80
High slope RF pentode
6.3
0.30
170
10.0
170
2.50
2.0
400.0
7.40
B9A
10
EF83
VM AF pentode
6.3
0.20
250
4.0
50
1.15
1.6
1.25 MΩ
1.6
B9A
23
EF85
VM RF pentode for TV
6.3
0.30
250
10.0
100
2.5
2/35
500.0
6.00
B9A
10
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EF86
Low noise AF pentode
6.3
0.20
250
3.0
140
0.6
2.0
2.5MΩ
1.80
B9A
23
EF89
VM RF pentode
6.3
0.20
250
9.0
100
3.0
2.0
1MΩ
3.60
B9A
36
EF91
High slope RF pentode
6.3
0.30
250
10.0
250
2.6
2.0
500.0
7.60
B7G
21
1947
EF92
VM RF pentode
6.3
0.20
250
8.0
200
2.1
2.5/21
500.0
2.5
B7G
21
EF93
VM RF pentode
6.3
0.30
250
11.0
100
4.2
1/20
1.5MΩ
4.4
B7G
16
EF95
VHF pentode
6.3
0.175
180
7.7
120
2.4
2.0
400.0
5.10
B7G
14
EF97
RF pentode
6.3
0.30
12.6
3.0
6.3
1.1
-
150.0
1.90
B7G
68
EF98
RF pentode
6.3
0.30
12.6
2.0
6.3
0.7
20.0
2.0
B7G
68
† Obtained with grid biasing resistor of 10MΩ.
EF730
RF pentode
6.3
0.15
100
5.3
100
4.1
1.0
110.0
3.2
B8D/F
8
EF731
VM RF pentode
6.3
0.15
100
7.2
100
2.0
1.0
260.0
4.5
B8D/F
14
EF732
RF pentode
6.3
0.15
100
7.5
100
2.4
1.0
260.0
5.0
B8D/F
14
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EF734
RF pentode
6.3
0.15
100
7.5
100
2.4
1.5
Ω175
5.0
0
B8D/F
17
EF812/6F23
RF pentode
6.3
0.30
170
10.0
170
2.6
1.9
9.2
B9A
10
EFL200
Double pentode for video o/p & sync separator
6.3
0.85
B10B
1
EFM1
AF amplifier & tuning indicator
6.3
0.20
146
185
0.8
0.5
40
180
0.6
0.2
2.0
20.0
Ct8
18
1938
EH2
Hexode - IF amplifier
Freq. changer
6.3
0.20
250
250
4.2
1.85
100
100
2.8
3.8
3/25
3/25
1M
2M
1.40
0.40⅄
530
430
Ct8+tc
16
1938
EH90
Dual control heptode
6.3
0.30
100
0.75
30
1.11
1.0
900.0
1.2
B7G
29
EK2
Octode FC
6.3
0.20
mix250
osc200
1.0
2.5
50
1.1
2/25
2.0
0.55⅄
490
Ct8+tc
2
1938
EK3
Octode FC
6.3
0.60
mix250
osc100
2.5
5.5
100
6.0
2.5/38
2M
0.65⅄
190
Ct8+tc
2
1938
EK32
Octode FC
6.3
0.20
mix250
osc200
1.0
2.5
50
0.8
2.0/25
2.0
0.55⅄
490
IO+tc
1
1940
EK90
Heptode FC
6.3
0.30
mix250
osc190
3.0
100
7.1
1.5/30
1 MΩ
0.475⅄
B7G
29
EL2
Output pentode
6.3
0.20
250
32.0
250
5.0
18.0
70.0
2.80
8.0
3.60
Ct8+tc
33
1938
EL3
Output pentode (triode connection)
6.3
0.90
250
250
36.0
20.0
250
4.0
6.0
8.5
50.0
3.0
9.00
6.50
7.0
7.0
4.5
1.1
Ct8
12
1938
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EL5
Output pentode
6.3
1.35
250
72.0
275
7.0
14.0
22.0
8.50
3.5
8.8
Ct8
12
1938
EL6
Output pentode
(Class AB1 Push-pull)
6.3
1.20
250
250
72.0
53.0
250
250
8.0
8.6
7.0
20.0
14.50
3.5
5.0
8.0
14.5

90
Ct8
12
1938
EL22
Output pentode
6.3
0.70
250
44.0
250
5.2
7.0
45.0
9.5
5.75
5.2
140
B8G
10
EL31
Output pentode
(Class AB1 push-pull)
6.3
1.40
275
800
91.0
30.0
275
400
11.0
3.1
9.0
26.0
20.0
14.00

10.0

102

-
IO+tc
40
PW
EL32
Output pentode
(Class A push-pull)
6.3
0.20
250
250
32.0
32.0
250
250
5.0
8.0
18.0
70.0
2.80
8.0
8.0
3.6
7.0

310
IO+tc
9
1940
EL33
Output pentode
(triode connection)
(Class A push-pull)
6.3
0.90
250
250
250
36.0
20.0
28.5
250
-
250
4.0
-
4.6
6.0
8.5
50.0
3.0
9.00
6.50
7.0
7.0
10.0
4.0
1.1
8.2


140
IO
36
1940
EL34
Output pentode
Push-pull fixed bias)
6.3
1.5
250
Vb500
100.0
2x125
250
Vb400
14.9
2x4
13.5
36.0
15.0
11.0

4.0

70

0
IO
133
EL35
Output pentode
(Class AB1 push-pull)
6.3
1.35
250
360
72.0
53.0
250
270
8.0
17.5
15.5
15.5
5.00
2.5
7.0
6.0
21.0

250
IO
36
WW2
EL36
Output pentode
(Class A push-pull)
6.3
1.20
250
250
72.0
45.0
250
250
8.0
5.1
7.0
20.0
14.50
3.5
5.5
8.0
14.5
90
90
IO
36
1940
† This EL36 should not be confused with the later 1950s version (shown below) intended for TV line timebases.
EL36
Line t/b output pentode
6.3
1.25
100
100
IO
129
EL37
Output pentode
(Class AB1 push-pull)
6.3
1.40
250
325
100.0
77.0
250
325
13.5
9.75
13.5
13.5
11.00
2.5
4.0
10.5
35.0
120
130
IO
36
1946
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EL38, EL38M
Line t/b output pentode
6.3
1.40
275
91.0
275
11.0
9.0
20.0
14.00
IO+tc
40
1946
EL41
Output pentode
6.3
0.70
250
36
250
5.2
7.0
40.0
10.0
7.0
4.2
170
B8A
23
EL42
Output pentode
6.3
0.20
225
26
225
4.1
10.8
90.0
3.2
9.0
2.5
360
B9A
23
EL50
Output pentode
6.3
1.35
250
72.0
275
8.0
14.0
22.0
8.50
3.5
8.8
Ct8+tc
21
1939
EL51
Output pentode
(Class AB1 push-pull)
6.3
1.90
750
550
40.0
147.0
750
750

33.0
44.0
7.7
55.0
7.00
7.00

6.00
Ct8+tc
21
1939
EL71
Output pentode
6.3
0.45
110
30.0
110
2.0
8.3
15.0
4.2
3.0
1.0
270
B8D/F
14
EL81
Output pentode &
Line t/b output pentode
6.3
1.05
250
[250
32
250
250
2.4
38.5
15.0
4.6
B9A+tc
17
EL83
Video output pentode
6.3
0.71
250
36.0
250
5.0
5.5
130.0
10.0
B9A
14
EL84
Output pentode
(Class AB1 push-pull)
6.3
0.76
250
300
48.0
2x46
250
300
5.5
2x4.0
7.1
38.0
11.3
4.5
8.0
5.7
20
135
130
B9A
16
EL85
Output pentode
6.3
0.20
225
26
225
4.1
10.8
90.0
3.2
9.0
2.6
360
B9A
26
EL86
Output pentode
(single-ended push-pull)
6.3
0.76
170
Vb300
70
Ib69
170
5.0
12.5
23.0
10.0

1.0

4.8

2x120
B9A
16
EL90
Output pentode
6.3
0.45
250
45
250
4.5
12.5
52.0
4.1
B7G
27
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EL91
Output pentode
6.3
0.20
250
16
250
2.4
130.0
2.6
16.0
1.4
680
B7G
25
EL95
Output pentode
6.3
0.20
250
24
250
4.5
9.0
80.0
5.0
B7G
67
EL360
Line t/b output pentode
6.3
1.27
250
48
100
5.5
46.0
13.5
6.90
IO+tc
129
EL506
Output pentode
6.3
0.80
B9D
2
EL820
Output pentode
6.3
1.05
250
32
250
2.4
38.5
15.0
4.6
B9A
17
EL821
Video output pentode
6.3
0.75
250
40.0
250
6.0
4.5
50.0
11.0
B9A
19
EL822
Video output pentode
6.3
0.75
250
40.0
150
5.0
2.5
100.0
13.0
B9A
19
ELL80
Double output pentode
6.3
0.55
250
24.0
250
4.5
4.6
80.0
6.0
10.0
3.0
160
B9A
68
FC13
Octode FC
13.0
0.20
mix250
osc90
1.6
2.0
70
3.8
1.5
2M
22.7
0.6⅄
250
Ct8+tcc
2
1934
FC13C
Octode FC
13.0
0.20
mix200
osc90
1.6
2.0
70
3.8
1.5
2M
22.7
0.6⅄
250
B7+tc
2
1935
FC2
Octode FC
2.0*
0.10
mix135
osc135
0.95
70
3.75
0
0.20⅄
B7+tc
1
1935
FC2A
Octode FC
2.0*
0.13
mix135
osc135
0.7
2.1
45
0.7
0.5/12
2.5M
0.27⅄
B7+tc
1
1937
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
FC4
Octode FC
4.0
0.65
mix250
osc90
1.6
2.06
70
3.8
1.5
1.6M
4.8
0.6⅄
250
B7+tc
2
1934
H20
High-μ triode
20.0
0.18
200
0.2
-
-
1.6
100.0
1.00
B5
1
1932
HBC90
Double diode triode
12.6
0.15
250
1.0
-
-
3.0
58.0
1.20
B7G
19
HBC91
Double diode triode
12.6
0.15
250
1.2
-
-
2.0
65.5
1.60
B7G
19
HF93
VM RF pentode
12.6
0.15
250
11.0
100
4.2
1.0
1.5MΩ
4.40
B7G
16
HK90
Heptode FC
12.6
0.15
250
3.0
100
7.9
1.5
1MΩ
0.475⅄
B7G
29
HL13
General-purpose triode
13.0
0.20
200
5.0
-
-
3.7
12.0
3.30
Ct8+tc
3
1934
HL13C
General-purpose triode
13.0
0.20
200
5.0
-
-
3.7
12.0
3.30
B7+tc
23
1935
HL20
Detector triode
20.0
0.18
200
3.5
-
-
3.5
14.0
2.50
B5
1
1932
HL92
Output pentode
50.0
0.15
110
49
110
4.0
7.5
10.0
7.50
2.5
1.9
B7G
42
KBC32
Double diode triode
2.0*
50mA
100
2.4
-
-
0
21.0
1.20
IO+tc
88
1946
KCF30
Triode pentode FC
2.0*
0.20
p120
t100
0.58
60
0.92
1.5
0
2.60⅄
1.70
IO+tc
98
1946
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
KF35
VM RF pentode
2.0*
50mA
120
1.45
60
0.5
1.5
1.5M
1.08
IO+tc
85
1946
KK32
Octode FC
2.0*
0.13
mix135
osc135
0.7
2.1
45
0.7
0
2.5M
0.27⅄
IO+tc
76
1946
KL35
Output pentode
2.0*
0.15
135
5.6
135
4.5
150.0
2.20
19.0
0.34
IO+tc
85
1946
KLL32
Double output pentode
2.0*
0.30
135
16.9
135
5.7
11.3
2.60
16.0
1.2
IO
97
1946
M8079 (SQ)
See EB91
-
-
M8080 (SQ)
See EC90
-
-
M8081 (SQ)
See ECC91
-
-
M8082 (SQ)
See EL91
-
-
M8083 (SQ)
See EF91
-
-
M8096 (SQ
See QV03-12 (TX valve)
-
-
M8097 (SQ)
See EAC91
-
-
M8099 (SQ)
See EC91
-
-
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
M8100 (SQ)
See EF95
-
-
M8101 (SQ)
See EF93
-
-
M8136 (SQ)
See ECC82
-
-
M8137 (SQ)
See ECC83
-
-
M8157 (SQ)
See QV04-7 (TX valve)
-
-
M8161 (SQ)
See EF92
-
-
M8162 (SQ)
See ECC81
-
-
M8196 (SQ)
Pentode
6.3
0.175
120
5.1
120
3.5
2.0
150.0
3.2
B7G
32
M8212 (SQ)
Double diode = 6AL5
6.3
0.30
117
9.0
B7G
18
M8248 (SQ)
UHF triode
6.3
0.40
150
13.5
-
-
1.35
3.7
13.5
B7G
84
M8718 SQ)
See EC71
-
-
ME1400 = CV432
Electrometer pentode
4.5
0.16
160
80μA
45
20 μA
2.0
Ω5MΩ
0.24
IO+tc
8
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
ME1401 = CV495
Electrometer triode
1.25*
13mA
9
100μA
-
-
2.5
0.08
B5J/F
1
ME1402 = CV2730
Electrometer tetrode
1.25*
13mA
4.5
20 μA
-3.2
+3.0
B5J/F
2
ME1403 = CV2730
Electrometer pentode
1.25*
8.2mA
10
5 μA
6.5
2.5
10.5 MΩ
0.01
B5J/F
3
ME1404 = CV8144
Electrometer triode
1.25*
14mA
9
100 μA
-
-
2.7
0.08
B5J/F
1
ME1406
Electrometer pentode
1.25*
8.2mA
10
5 μA
6.5
2.5
10.5 MΩ
0.01
B5J/F
3
MM4V
VM RF pentode
4.0
1.00
200
6.0
110
0.8
1.5
350.0
2.50
B5+tc
2
1931
MM20
VM RF pentode (DC)
20.0
0.18
200
6.0
110
0
3.50
B5+tc
2
1932
MZ05-60
Output triode (PA)
6.0*
1.65
500
120.0
-
-
95.0
3.25
1.5
10.0
925
L4
1
1935
MZ1-75
Output triode (PA)
10.0*
1.10
1000
75.0
-
-
80.0
2.5
4.00
8.0
20.0
BC4
1
1935
MZ1-100
Output triode (PA)
6.0*
2.7
1000
100.0
-
-
145.0
1.4
4.00
7.0
30.0
L4
1
1938
MZ2-200
Output triode (PA)
14.0*
2.20
2000
125.0
-
-
3.0
5.40
0
USL4b
1938
PA = Public Address
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
PABC80
Triple diode triode
9.5
0.30
200
1.0
-
-
2.3
50.0
1.4
B9A
2
PC86
UHF frame grid triode
4.0
0.30
175
12.0
-
-
1.5
4.85
14.0
B9A
74
PC88
UHF frame grid triode
3.8
0.30
160
12.5
-
-
1.25
13.5
4.8
B9A
75
PC95
VHF frame grid triode
3.6
0.30
200
10.0
-
-
1.2
7.6
10.5
B7G
79
PC97
VHF triode
4.5
0.30
135
11.0
-
-
1.0
5.0
13.0
B7G
79
PC900
VHF triode for TV
3.9
0.30
135
11.5
-
-
1.0
5.25
14.5
B7G
83
PCC84
VHF double triode for cascode TV amplifier
7.0
0.30
90
12.0
-
-
1.5
4.0
6.0
B9A
28
PCC85
VHF double triode for TV
9.0
0.30
90
15.0
-
-
1.2
2.9
12.3
B9A
39
PCC88
VHF frame-grid double triode for cascode amp.
7.0
0.30
90
15.0
-
-
1.3
2.6
12.5
B9A
39
PCC89
VHF frame-grid double triode for cascode amp.
7.2
0.30
90
15.0
-
-
1.2
3.0
12.0
B9A
28
PCC189
VM VHF frame grid double triode for cascode amp.
7.6
0.30
90
15.0
-
-
1.4
2.5
12.5
B9A
39
PCC805/30L15
RF double triode for cascode amp
7.0
0.30
90
15.0
-
-
1.2
3.0
9.0
B9A
28
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
PCE800/30FL1
Triode & beam tetrode
9.4
0.30
170
10.0
170
2.5
2.1
8.0
B9A
49
PCF80
VHF triode pentode FC
9.0
0.30
p170
t100
10.0
14.0
170
2.8
2.0
2.0
400.0
4.0
6.2
5.0
B9A
25
PCF82
Triode pentode FC
9.5
0.30
p250
t250
5.2
18.0
117
1.9
0
1.0

5.0
1.9⅄
B9A
25
PCF84
Triode & VHF pentode FC
9.0
0.30
p170
t100
8.0
14.0
170
2.7
0
2.0
400.0
4.0
2.5
B9A
65
PCF86
Triode & frame-grid
pentode FC
8.0
0.30
p170
t100
10.0
14.0
150
3.3
1.2
3.0
350.0
12.0
5.7
B9A
64
PCF200
Triode pentode FC
8.0
0.30
mix160
osc170
13.0
8.5
135
2.5
1.7
1.0
14.0
5.2
B10B
3
PCF201
Triode pentode FC
8.0
0.30
mix160
osc100
13.0
14.0
110
5.3
1.4
12.6
B10B
3
PCF800/30C15
Triode pentode FC
9.0
0.3
mix164
osc120
7.6
6.0
170
2.3
600.0
3.3
B9A
25
PCF801
Triode & frame-grid VM pentode for FC and IF amplifier
8.5
0.30
mix173
osc100
10.0
15.0
119
3.0
1.4
 3.0
>350.0
5.0
B9A
73
PCF802
Triode & pentode for line oscillator circuits
9.0
0.30
p100
t200
6.0
3.5
100
1.7
2.0
2.0
400.0
20.0
5.5
3.5
B9A
25
PCF805/30C18
Triode & VM pentode FC
8.0
0.30
mix190
osc120
7.6
6.0
138
2.2

3.0
600.0
3.30
B9A
42
PCF806
AF triode& frame-grid pentode FC for TV
8.0
0.30
mix190
osc120
8.5
14.0
141

3.0
4.5
B9A
73
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
PCH200
Triode heptode for sync pulse gen. & clipper
8.5
0.30
h14
t100
1.5
9.0
14
1.3
0
1.0
5.7
8.8
B10B
4
PCL82
Triode & output pentode for frame output or AF
16.0
0.30
p200
t100
35.0
3.5
200
8.0
16.0
0
20.0
32.0
6.4
2.2
B9A
37
PCL83
Triode & output pentode
12.6
0.30
p170
t250
30.0
10.5
170
5.0
9.5
8.5

7.7
5.5
10.5
5.5
2.5
B9A
27
PCL84
Triode & output pentode
15.0
0.30
p220
t220
18.0
18.0
220
3.0
3.4
3.3
150.0
10.0
9.7
B9A
53
PCL85
Triode & field output pentode for TV
17.5
0.30
p65
t100
285pk
10.5
210
45
1.0
0

9.0

7.0
B9A
66
PCL86
Triode output pentode
13.3
0.30
p230
t200
41.0
3.5
230
10.0
5.7
2.0
45.0
20.0
10.5
3.5
B9A
76
PCL88/30PL14
Triode & output beam tetrode
16.0
0.30
p170
t100
50.0
10.0
170
3.0
15.0
2.1

4.2
7.3
4.3
B9A
37
PCL800/30PL13
Triode & output beam tetrode
16.0
0.30
170
100
45.0
10.0
170
8.7
13.5
2.1

4.2
7.5
2.1
B9A
37
PCL801/30LP1
Triode & output beam tetrode
13.0
0.30
p170
t200
31.0
10.0
180
7.3
9.0
7.7

5.3

2.4
5.0
2.0
B9A
26
PCL805
See PCL85
-
-
PD500
Shunt stabiliser triode
7.3
0.30
25kV max
1.6
150.0
B9D+tc
1
Pen4DD
Double diode output pentode
4.0
2.25
250
36.0
250
5.0
6.0
50.0
9.50
7.0
4.3
B7+tc
22
1937
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
Pen4V
Output pentode
4.0
1.00
250
35.0
200
10.0
13.0
8.0
3.00
8.0
2.0
B5+st
16
1931
Pen4VA
Output pentode
4.0
1.50

1.35
250

250
32.0

36.0
250

250
12.0

3.0
22.0

20.0


40.0


2.80
6.0

6.0
3.4

3.8


500
B5+st
 B7
16
 24
1934
1933
1937
Pen4VB (= PenA4)
Output pentode
4.0
1.95
250
36.0
250
5.0
5.8
50.0
9.50
8.0
3.8
B7
24
1935
Pen13C
Output pentode
13.0
0.50
250
32.0
250
7.0
12.0
6.00
6.5
3.2
250
B7
24
1935
Pen20
Output pentode
20.0
0.18
200
25.0
200
9.0
15.0
8.0
1.5
B5+st
B7
16
24
1932
Pen26
Output pentode
24.0
0.20
200
40.0
100
5.0
19.0
3.10
5.0
3.0
420
Ct8+tc
4
1934
Pen36C = CL33
Output pentode
33.0
0.20
200
45.0
200
6.0
8.5
35.0
8.00
4.5
4.0
167
B7
24
1935
Pen40DD
Double diode output pentode
44.0
0.20
200
45.0
200
6.0
8.5
35.0
8.00
4.5
4.0
170
B7+tc
22
1939
Pen428
Output pentode
(Class AB push-pull)
4.0
2.10
250
375
72.0
48.0
250
275

5.0
3.2
6.5
8.0
28.0
150
165
B7
24
1937
Pen650 (= EL50)
Output pentode
1939
PenA4
Output pentode
4.0
1.95
250
36.0
250
5.0
5.8
50.0
9.50
8.0
3.8
145
B7
24
1937
PenB4
Output pentode
4.0
2.10
250
72.0
275
7.0
14.0
22.0
8.50
3.5
8.8
175
B7
24
1937
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
PF818/30F5
RF pentode
7.3
0.30
170
10.0
170
2.6
1.9
8.8
B9A
10
PFL200
Double pentode for TV
17.0
0.30
amp150
o/p170
10.0
30.0
150
170
3.0
7.0
2.1
2.7
150.0
33.0
8.5
22.0
B10B
1
PL33
Output pentode
19.0
0.30
225
32
225
3.4
5.3
50.0
9.0
7.0
3.4
150
IO
36
PL36
Line t/b output pentode
25.0
0.30
100
100
100
7.0
8.2
5.0
14.0
IO+tc
129
PL38
Line t/b output pentode
30.0
0.30
200
200
IO+tc
40
PL38M
Line t/b output pentode
30.0
0.30
IO+tc
40
PL81
Line t/b output pentode
21.5
0.30
170
45
170
3.0
24.0
15.0
6.5
B9A+tc
17
PL81A
Line t/b output pentode
21.5
0.30
170
45
170
2.2
24.5
11.5
6.0
B9A+tc
17
PL82
Output pentode
16.5
0.30
170
53.0
170
10.0
10.4
20.0
9.0
3.0
4.2
165
B9A
16
PL83
Video output pentode
15.0
0.30
200
36
200
5.0
3.5
100.0
10.0
B9A
14
PL84
Frame output pentode
15.0
0.30
200
60
200
3.0
17.3
28.0
8.8
B9A
16
PL302/30P19
Line t/b/ beam tetrode
25.0
0.30
400
250
IO+tc
129
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
PL500
Line t/b output pentode
27.0
0.30
75
200
B9D+tc
1
PL504
Line t/b output pentode
27.0
0.30
75
440
300
30.0
10.0
B9D+tc
1
PL505
Line t/b output pentode
40.0
0.30
160
1.4amp
160
45.0
0
B9D+tc
7
PL508
Field output pentode for colour TV
17.0
0.30
190
60
190
5.0
17.0
10.0
9.0
B9D
6
PL509
Line t/b output pentode
40.0
0.30
50
800.0
175
70
10.0
B9D+tc
7
PL801/30P12
Triode & output beam tetrode
12.6
0.30
170
32.0
180
6.5
10.3
7.2
6.0
2.0
270
B9A
27
PL802
Video output pentode
16.0
0.30
170
30
170
6.5
1.3
40.0
B9A
91
PL820
Line t/b output pentode
21.5
0.30
200
40
200
2.8
28.0
11.0
6.0
B9A+tc
17
PM0
General-purpose triode
1.4*
0.14
80
-
-
B4
1
1926
PM1
General-purpose triode
1.8*
0.10
100
1.6
-
-
2.0
28.0
0.48
B4
1
1926
PM1A
RCC triode
2.0*
0.10
150
150
0.8
1.0
-
-
1.5
1.0
51.0
41.6
0.70
1.00
B4
1
1927
1931
PM1DG
Bi-grid FC or AF amplifier
2.0*
0.10
80
20
6.0
2.6
20
20
-
6.0
2.0
0.80
0.80
B4+st
28
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
PM1HF
General-purpose triode
2.0*
0.10
135
1.5
-
-
3.0
23.0
0.80
B4
1
1926
PM1HL
General-purpose triode
(improved version)
2.0*
0.10
150
150
2.0
2.0
-
-
3.0
3.0
14.0
20.0
2.00
1.40
B4
1
1931
1932
PMILF
Detector or AF triode
2.0*
0.10
150
4.0
-
-
7.5
12.0
0.90
B4
1
1926
PM2
Output triode
2.0*
0.15
0.20
100
135

6.0
-
-
10.5
10.5
8.75
4.4
0.62
1.70

9.0

0.15
B4
1
1926
1929
PM2A
Output triode
2.0*
0.20
135
5.0
-
-
6.0
6.0
2.00
7.0
0.15
B4
1
1930
PM2B
Class B output triode
2.0*
0.20
120
3/20
-
-
0
14.0
1.25
B7
10
1933
PM2BA
Class B output triode
2.0*
0.20
120
3/20
-
-
4.5
14.0
1.45
B7
10
1934
PM2DL
Class B driver triode
2.0*
0.10
120
1.5
-
-
4.5
12.0
1.50
B4
1
1935
PM2DX
Detector triode
(Improved version)
2.0*
0.20
0.10
150
135
2.7
2.0
-
-
6.0
4.5
10.7
18.0
1.25
1.00
B4
1
1928
1931
PM2HL
Triode
2.0*
0.10
135
2.2
-
-
1.5
21.5
1.40
B4
1
1938
PM3
Detector or AF triode
 (Improved version)
4.0*
0.10
0.075
100
100

2.0
-
-

0
16.0
13.0
0.84
1.05
B4
1
1926
1927
PM3A
RCC triode
4.0*
0.075
150
0.7
-
-
1.3
55.0
0.66
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
PM3D
AF triode
4.0*
0.10
150
3.25
-
-
4.0
8.0
3.00
B4
1
1931
PM4
Output triode
(Improved version)
4.0*
0.10
100
150

8.0
-
-
9.0
10.5
9.0
4.45
0.67
1.80

9.0

0.17
B4
1
1925
1929
PM4D = PM4DX
Detector or AF triode
4.0*
0.10
-
-
B4
1
1928
PM4DG
Bi-grid FC or AF amplifier
4.0*
0.08
100
4.0
21
3.5
B4+st
28
1931
PM4DX (was PM4D)
Detector or AF triode
4.0*
0.10
150
2.5
-
-
6.0
7.5
2.00
B4
1
1928
PM5
General-purpose triode
6.0*
0.10
125
-
-
19.0
0.92
B4
1
1926
PM5A
RCC triode
6.0*
0.10
125
-
-
50.0
0.52
B4
1
1927
PM5B
RCC triode
(Improved version)
6.0*
0.10
0.075
150
150

0.6
-
-

1.5
74.0
49.0
0.50
0.85
B4
1
1927
1927
PM5D
Detector triode
6.0*
0.075
150
1.2
-
-
3.0
26.0
1.30
B4
1
1930
PM5X
Detector or AF triode
(Improved version)
6.0*
0.10
0.075
125
150

2.0
-
-

3.0
19.0
14.7
0.92
1.20
B4
1
1927
1927
PM6
Output triode
(improved version)
6.0*
0.10
100
150

10.0
-
-
6.0
9.0
5.7
3.6
1.25
2.25

5.0

0.8
B4
1
1926
1929
PM6D
Detector or AF triode
6.0*
0.10
150
2.5
-
-
4.5
9.0
2.00
B4
1
1928
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
PM12
RF tetrode
2.0*
0.15
150
4.3
75
1.0
0
180.0
1.10
B4+tc
2
1927
PM12A
RF tetrode
2.0*
0.18
125
2.0
75
0.4
0
330.0
1.50
B4+tc
2
1932
PM12M
VM RF tetrode
2.0*
0.18
150
2.5
90
0.5
0/7
230.0
1.40
B4+tc
2
1933
PM12V
VM RF tetrode
2.0*
0.15
150
5.0
90
6.0
0.75
B4+tc
2
1932
PM13
RF tetrode (DC)
4.0*
0.10
200
4.5
100
1.0
400.0
0.90
B4+st
B5+tc
26
6
1929
PM14
RF tetrode
4.0*
0.075
150
1.5
75
230.0
0.87
B4+tc
2
1927
PM16
RF tetrode
6.0*
0.075
150
1.75
75
200.0
1.00
B4+tc
2
1927
PM22
Output pentode
2.0*
0.30
150
150
13.0
15.0
150
150
4.0
4.0
12.0
10.0
1.30
11.0
8.0
0.40
0.60
B4+st
B5
26
6
1928
1929
PM22A
Output pentode
2.0*
0.20
0.15
150
135
9.5
5.6
150
135
2.0
4.5
4.5

150.0
2.50
2.20
15.0
19.0
0.42
0.34
B4+st
B5
26
6
1932
1936
PM22C
Output pentode
2.0*
0.30
150
27.0
150
4.5
20.0
7.0
1.45
B5
6
1934
PM22D
Output pentode
2.0*
0.30
135
5.0
135
0.8
2.4
3.00
24.0
0.30
B5
6
1936
PM24
Output pentode (AC)
4.0*
0.15
150
20.0
150
5.0
12.0
1.75
10.0
0.50
B4+st
B5
Z
6
1928
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
No details for PM24A
Output pentode (AC)
4.0*
0.275
300
300
21.0
20.0
200
200
6.0
3.5
21.0
22.5
2.00
2.00
8.0
10.0
1.5
2.5
B5
6
1929
PW
PM24B
Output pentode (AC)
4.0*
1.00
400
20.0
300
6.0
40.0
2.10
8.0
3.0
B5
6
1930
PM24C
Output pentode (AC)
4.0*
1.00
400
30.0
200
4.5
28.0
3.00
8.0
3.5
B5
6
1931
PM24D
Output pentode (AC)
4.0*
2.00
500
50.0
200
9.0
35.0
4.00
7.0
10.0
B5
6
1931
PM24E
Output pentode (AC)
4.0*
2.00
500
50.0
200
9.0
35.0
7.0
10.0
B5
6
1937
PM24M
Output pentode (AC)
4.0*
1.10
250
30.0
250
5.6
17.0
43.0
3.00
7.0
2.8
B5
6
1932
PM25
Output pentode (DC)
5.0*
0.10
150
10.0
150
15.0
45.0
1.30
8.0
B4+st
B5
26
6
1929
PM26
Output pentode
6.0*
0.17
150
17.0
150
4.0
15.0
2.00
9.0
0.75
B4+st
B5
26
6
1929
1929
PM202
Output triode
2.0*
0.20
150
14.0
-
-
15.0
2.0
3.50
3.7
0.35
B4
1
1931
PM252
Output triode
(Improved version)
(further improved)
2.0*
0.30
0.30
0.40
125
150
150

16.0
17.0
-

-


15.0
11.0
3.8
2.6
1.9
1.00
2.10
3.70


4.0

0.32
0.32
B4
1
1927
1929
1931
PM254
Output triode
(improved version)
4.0*
0.25
0.18
150
150

14.0
-
-

22.5
3.5
2.0
0.90
2.10

0.38
B4
1
1927
1929
PM256
Output triode
(Improved version)
(further improved)
6.0*
0.25
150
180
250

21.0
20.0
-

-


18.0
27.0
3.5
1.85
1.85
0.90
3.25
3.25


6.0

0.6
1.0
B4
1
1927
1929
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
PM256A
Output triode
6.0*
0.25
200
30.0
33.0
1.4
2.60
3.5
0.9
B4
1
1930
QP22A
Double output pentode
2.0*
0.45
135
3.0
Graded
10.5
4.00
16.0
1.4
B9
8
1935
QP22B
Double output pentode
2.0*
0.30
135
3.8
135
0.5
11.7
14.7
1.33
B7
11
1938
RL16 (= EC52)
UHF oscillator triode
-
-
-
-
1941
RL18 (= EC53)
UHF oscillator triode
-
-
-
-
1941
RL37 (= EC54)
Grounded-grid triode
-
-
-
-
1941
RL7 (= EF54)
VHF pentode
-
-
1941
S4V
RF tetrode
4.0
1.00
200
1.5
75
1.0
910.0
1.10
B4+st
B5+tc
34
2
1929
1929
S4VA
RF tetrode
4.0
1.00
200
2.5
110
0.6
1.5
500.0
2.00
B5+tc
2
1930
S4VB
RF tetrode
4.0
1.00
200
4.6
110
1.05
1.5
300.0
2.50
B5+tc
2
1930
SD4
Diode and AF tetrode
4.0
1.00
200
100
2.2
3.00
B7+tc
43
1933
SD20
Diode and AF tetrode (DC)
20.0
0.18
200
5.0
100
1.5
120.0
2.80
B7+tc
43
1934
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
SG20
RF tetrode (DC)
20.0
0.18
200
3.0
100
0.2
275.0
2.00
B5+tc
2
1932
SP2
RF pentode
2.0*
0.18
135
3.0
135
1.0
0
700.0
1.80
B7+tc
4
1934
SP4
RF pentode
4.0
1.00
200
3.0
100
2.0
2.2M
2.40
B5+tc
B7+tc
2
5
1933
1934
SP4B
RF pentode
4.0
0.65
250
4.0
250
1.5
2.4
2M
3.40
B7+tc
6
1935
SP4C
RF pentode
4.0
0.65
250
4.0
250
1.5
2.4
2M
3.40
Ct8+tc
15
1936
SP13
RF pentode
13.0
0.20
200
3.3
100
1.2
2.0
1.3M
2.20
Ct8+tc
15
1934
SP13C
RF pentode
13.0
0.20
200
2.5
200
0.9
2.2
2.5M
2.80
B7+tc
6
1935
SP20
RF pentode (DC)
20.0
0.18
200
3.0
100
1.2
1.5M
3.50
B5+tc
2
1933
T4D
VHF single diode
4.0
0.20
50
5.0
-
-
B3G
1
1938
T6D (= EA50)
VHF single diode
-
-
B3G
1
1938
TDD2
Double diode triode
2.0*
0.10
150
2.5
-
-
5.5
12.0
1.40
B5+tc
5
1934
TDD2A
Double diode triode
2.0*
0.12
135
1.95
-
-
1.5
25.0
1.20
B5+tc
5
1934
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
TDD4
Double diode triode
4.0
0.65
250
4.0
-
-
7.0
13.5
2.00
B7+tc
7
1933
TDD13
Double diode triode
13.0
0.20
200
4.0
-
-
5.0
13.5
2.00
Ct8+tc
7
1935
TDD13C
Double diode triode
13.0
0.20
200
4.0
-
-
5.0
13.5
2.00
B7+tc
7
1935
TDD25
Double diode triode
25.0
0.18
200
4.0
-
-
4.0
15.0
2.00
B7+tc
7
1933
TH2
Triode hexode FC
2.0*
0.23
h135
t100
0.95
4.0
60
1.6
1.5
600.0
0.43⅄
B7c
34
1939
TH4
Triode hexode FC
4.0
1.00
h250
t150
4.0
6.0
70
6.0
1.5
1.5M
1.00⅄
1.20
100
B7+tc
3
1936
TH4A
Triode hexode FC
4.0
1.50
h275
t100
3.25
22.0
100
7.0
2.5/25
1.5M
3.3
0.75⅄
6.00
B7+tc
3
1937
TH4B
Triode hexode FC
4.0
1.45
h250
t100
3.25
9.5
100
6.0
2.5
1.5M
3.2
0.75⅄
5.50
140
B7+tc
3
1938
TH13C
Triode hexode FC
13.0
0.31
h250
t150
4.0
6.0
70
6.0
1.5
1.5M
1.00⅄
1.20
100
B7+tc
3
1936
TH21C
Triode hexode FC
21.0
0.20
h250
t130
4.0
6.0
70
6.0
1.5
1.5M
1.00⅄
100
B7+tc
3
1936
TH22C
Triode hexode FC
29.0
0.20
h275
t100
3.25
22.0
100
7.0
2.5/25
1.5M
3.3
0.75⅄
6.00
B7+tc
3
1937
TH30C
Triode hexode FC
29.0
0.20
h250
t100
3.25
9.5
100
6.0
2.5
1.5M
3.2
0.75⅄
5.50
140
B7+tc
3
1939
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
TH62 (= ECH35)
Triode hexode FC
6.3
0.20
h250
t100
3.0
3.3
100
3.0
2/17
1.3M
8.6
0.65⅄
2.80

215
IO+tc
3
1939
TP4
Triode pentode FC
4.0
1.25
p250
t150
3.0
150
0.75
5.0

31.0
0.65⅄
B9+tc
2
1934
TSE4
Secondary emission RF pentode
4.0
1.10
250
8.0
g2 150
k2 150
0.7
-6.0
2.5
100.0
14.50
B7
44
1938
TSP4
RF pentode - amplifier
video output
4.0
1.30
200
250
8.0
10.5
200
250
1.5
2.0
2.5
3.0

750.0
4.73

10.0
260
250
B7+tc
6
1936
TT4
AF or output triode
4.0
1.00
250
20.0
-
-
16.0
3.3
3.2
10.0
0.5
800
B5
1
1937
TT4A
AF or output triode
4.0
1.00
250
20.0
-
-
9.0
4.4
4.1
5.0
0.4
450
B5
1
1939
UABC80
Triple diode triode
28.0
0.10
200
1.0
-
-
2.3
50.0
1.4
B9A
2
UAF41
Diode VM RF pentode
12.6
0.10
200
5.0
85
1.5
2.0
1MΩ
2.0
B8A
11
UAF42
Diode VM RF pentode
12.6
0.10
200
5.0
85
1.5
2.0
1MΩ
2.0
B8A
12
UB41
Double diode
19.0
0.10
150
9.0
-
-
-
-
-
B8A
10
UBC41
Double diode triode
14.0
0.10
170
1.5
-
-
1.6
42.0
1.65
B8A
9
UBC81
Double diode triode
14.0
0.10
170
1.5
-
-
1.55
42.0
1.65
B9A
54
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
UBF80
Double diode VM RF pentode
17.0
0.10
200
5.0
85
1.75
2.0
1MΩ
2.2
B9A
12
UBF89
Double diode VM RF pentode
19.0
0.10
p200
d200
11.0
0.8
100
3.3
1.5/20
600.0
4.5
B9A
12
UBL21
Double diode output pentode
55.0
0.10
200
55
200
9.5
13.0
25.0
8.0
3.5
4.8
200
B8G
6
UC92
Grounded grid triode
9.5
0.10
170
8.5
-
-
1.0
11.0
5.9
B7G
66
UCC84
Double triode
21.0
0.10
90
12.0
-
-
1.5
4.0
6.0
B9A
28
UCC85
Double triode
26.0
0.10
200
10
-
-
2.4
7.7
6.0
B9A
39
UCF80
Triode & pentode
27.0
0.10
p170
t100
10.0
14.0
170
2.8
2.0
2.0
400.0
4.0
6.2
5.0
B9A
25
UCH21
Triode heptode FC
20.0
0.10
mix200
osc100
3.5
1.9
200
6.5
2.0
1MΩ
0.75⅄

22.0
B8G
42
UCH41
Triode hexode FC
14.0
0.10
mix200
osc100
3.0
2.8
225
2.1
2.2
1MΩ
0.5⅄
0.56

10.0
225
B8A
8
UCH42
Triode hexode FC
14.0
0.10
mix200
osc100
3.0
3.1
85
3.0
2.0
>1MΩ
0.75⅄
0.60

10.0
180
B8A
3
UCH81
Triode heptode FC
19.0
0.10
mix200
osc100
3.7
13.5
119
8.1
2.6
0
1MΩ
5.9
0.775⅄
3.7
B9A
24
UCL82
Triode & output pentode
50.0
0.10
p200
t100
35.0
3.5
200
7.0
16.0
0
20.0
28.0
6.4
2.5
5.6
3.5
B9A
37
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
UCL83
Triode & output pentode
38.0
0.10
p170
t200
30.0
2.4
170
5.0
9.5
1.5
53.0
34.0
5.5
2.5
5.5
2.5
B9A
27
UF41
VM RF pentode
12.6
0.10
170
6.0
100
1.75
2.5
1MΩ
2.3
B8A
7
UF42
High slope RF pentode
21.0
0.10
170
10.0
170
2.8
2.0
200.0
8.50
B8A
8
UF80
High slope RF pentode
19.0
0.10
170
10.0
170
2.5
2.0
400.0
7.4
B9A
10
UF85
VM RF pentode
19.0
0.10
200
11.4
116
3.1
2.3
350.0
6.1
B9A
10
UF86
Low noise AF pentode
12.6
0.10
200
3.0
140
0.6
2.0
2.5MΩ
1.8
B9A
23
UF89
VM RF pentode
12.6
0.10
170
12.0
110
3.9
2.0
525.0
3.8
B9A
36
UL41
Output pentode
45.0
0.10
200
45.0
200
8.5
14.2
24.0
8.2
4.3
4.2
B8A
23
UL44
Line t/b output pentode
45.0
0.10
175
30.0
175
4.7
13.5
7.1
B8A
14
UL46
Video output pentode
45.0
0.10
200
45.0
200
8.5
14.2
24.0
8.2
4.3
4.2
B8A
7
UL84
Output pentode
45.0
0.10
170
70
170
5.0
12.5
230.0
10.0
2.2
5.2
170
B9A
16
VM4V
VM RF tetrode
4.0
1.00
200
8.5
100
1.5
1.5/40
300.0
1.20
B5+tc
2
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
VP13A
VM RF pentode
13.0
0.20
200
4.0
100
1.4
2.0
1M
2.20
Ct8+tc
15
1934
VP2
VM RF pentode
2.0*
0.18
135
3.0
135
1.25
0
400..0
1.50
B7+tc
4
1934
VP4
VM RF pentode
4.0
1.00
200
4.5
100
1.9
2/22
1M
2.30
B5+tc
B7+tc
2
5
1933
1934
VP4A
VM RF pentode
4.0
1.20
200
4.25
100
1.8
2.0
1.4M
2.50
B5+tc
B7+tc
2
5
1934
1934
VP4B
VM RF pentode
4.0
0.65
250
11.5
250
4.25
3.0
2.00
160
B7+tc
6
1935
VP13C
VM RF pentode
13.0
0.20
200
9.0
200
3.6
2.0
2.20
B7+tc
6
1935
VP20
VM RF pentode (DC)
20.0
0.18
200
4.0
100
1.8
1.5
2M
2.50
B5+tc
2
1933
VP2B
Hexode - as pentode
as mixer, g2/g4 joined
2.0*
0.135
135
135
2.0
1.0
60
60
0.95
1.1
1.5
1.5
1.3M
1M
1.4
0.45⅄
B7+tc
28
1937

Rectifiers

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

 Mullard

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
5U4
FW
DH
5.0
3.00
450
225
IO
60
5V4
FW
IH
5.0
2.00
375
175
IO
62
5Y4
FW
DH
5.0
2.00
350
125
IO
60
5Z4
FW
IH
5.0
2.00
350
125
IO
62
6X5
FW
IH
6.3
0.60
325
70
IO
54
25Z4
HW
IH
25.0
0.30
250
100
IO
111
35Z5
HW
IH
35.0
0.15
235
100
IO
51
80
FW
DH
5.0
2.00
350
125
USM4
3
AX50
FW/MV
DH
4.0
3.75
500
250
B4
5
AZ1
FW
DH
4.0
1.10
300
100
285
Ct8
23
1938
AZ2
FW
DH
4.0
2.00
500
160
Ct8
23
1938
AZ3
FW
IH
4.0
2.00
350
120
380
Ct8
14
1938
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
AZ31
FW
DH
4.0
1.10
300
100
IO
60
1939
AZ32
FW
DH
4.0
2.00
300
160
IO
60
1939
AZ41
FW
DH
4.0
0.72
300
70
B8A
26
AZ50
FW
DH
4.00
3.0
500
250
Ct8
23
1939
CY1
HW
IH
20.0
0.20
250
120
Ct8
5
1939
CY1C
HW
IH
20.0
0.20
250
120
B5
8
1939
CY2
2 x HW
IH
30.0
0.20
250
120
Ct8
6
1939
CY30/U301
ED
IH
28.0
0.20
150
4500
IO+tc
128
CY31
HW
IH
20.0
0.20
250
75
IO
55
1939
CY32
2 x HW
IH
30.0
0.20
250
120
IO
53
1939
DU1
HW
DH
4.0
0.60
250
30
250
B4/3
4
1930
DU2
FW
DH
4.0
1.00
250
75
250
B4
5
1928
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
DU3
HW
DH
4.0
0.60
500
30
B4/3
4
1930
DU4
HW
DH
4.0
1.00
500
60
500
B4/3
4
1930
DU5
FW
DH
4.0
1.00
300
75
B4
5
1926
DU10
HW
DH
4.0
1.00
250
75
250
B4/3
4
1926
DU15
HW
DH
7.5
0.60
500
60
520
USM
4
1930
DW1
FW
DH
4.0
0.60
250
30
260
B4
5
1930
DW2
FW
DH
4.0
1.00
250
60
245
B4
5
1930
DW2X
FW
DH
4.0
1.00
250
75
B4
5
DW3
FW
DH
4.0
2.00
350
120
320
B4
5
1931
DW4
FW
DH
4.0
2.00
500
120
500
B4
5
1931
DW4-350
FW
DH
4.0
2.00
350
120
380
B4
5
1936
DW4-500
FW
DH
4.0
2.00
500
120
B4
5
1939
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
DW5
HW
DH
4.0
1.20
800
100
B4/3
4
DW6
FW
DH
4.0
4.00
1000
120
1100
B4
5
1931
DW7
HW
DH
4.0
1.30
1000
75
USM4
4
DW7X
FW
DH
4.0
1.00
500
60
B4
5
DW8
FW
DH
5.0
1.00
425
60
450
B4
5
1930
DW15
FW
DH
7.5
0.60
500
60
650
USM4
3
1929
DW30
FW
DH
7.5
2.40
500
120
500
B4
5
1929
DY51
EHT
IH
1.4
0.55
0.35
15kV
Wires
DY70
EHT
DH
1.25
0.14
2900
1.8
Wires
DY86, DY87
EHT
IH
1.4
0.55
0.5
22kV
B9A+tc
50
DY802
EHT
IH
1.4
0.55
0.5
25kV
B9A+tc
50
EY51 Pulsed input
EHT
IH
6.3
90mA
17,000
0.35
Wires
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EY70
HW
IH
6.3
0.45
235
45
B8D
11
EY81
HW
IH
6.3
0.80
22,000
150
4500
B9A+tc
34
EY84
HW
IH
6.3
1.00
625
125
B9A+tc
30
EY86 Pulsed input
EHT
IH
6.3
90mA
22,000
0.8
B9A+tc
50
EY86, EY87
EHT
IH
6.3
90mA
0.8
22kV
B9A+tc
50
EY88
ED
IH
6.3
1.55
220
6600
B9A+tc
34
EY91
HW
IH
6.3
0.42
250
75
B7G
50
EZ1
FW
IH
6.3
0.40
250
60
Ct8
14
1938
EZ2
FW
IH
6.3
0.40
350
60
Ct8
14
1937
EZ3
FW
IH
6.3
0.65
400
100
Ct8
14
1938
EZ4
FW
IH
6.3
0.90
400
175
Ct8
14
EZ35
FW
IH
6.3
0.65
327
70
IO
54
1946
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EZ40
FW
IH
6.3
0.60
350
90
B8A
14
EZ41
FW
IH
6.3
0.40
250
60
B8A
14
EZ80
FW
IH
6.3
0.60
350
90
B9A
31
EZ81
FW
IH
6.3
1.00
350
90
B9A
31
EZ90
FW
IH
6.3
0.60
327
70
B7G
31
FW4-500
FW
DH
4.0
3.00
500
250
B4
5
1939
FW4-800
FW
DH
4.0
3.00
850
125
B4
5
GZ30
FW
IH
5.0
2.00
375
125
IO
62
GZ32
FW
IH
5.0
2.3
500
125
IO
62
GZ33
FW
IH
5.0
2.8
500
250
IO
62
GZ34
FW
IH
5.0
1.90
500
160
IO
62
GZ37
FW
IH
5.0
2.8
500
250
IO
62
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
HVR1
EHT
DH
2.0
0.29
6000
5
15kV
5400
B4+tc
6
1936
HVR2
EHT
IH
4.0
0.65
6000
3
20kV
6200
B4+tc
17
1937
HVR2A
EHT
IH
2.0
1.50
6000
3
B4+tc
17
1937
HY90
HW
IH
35.0
0.15
117
100
B7G
33
IW2
FW
IH
4.0
1.20
250
60
250
B4
14
1933
IW2A
FW
IH
4.0
2.40
250
60
B4
14
1933
IW3
FW
IH
4.0
2.40
350
120
350
B4
14
1933
IW4
FW
IH
4.0
2.40
500
120
500
B4
14
1934
IW4-350
FW
IH
4.0
2.00
350
120
B4
14
1936
IW4-500
FW
IH
4.0
2.50
500
120
B4
14
1939
KY50/U25
EHT
IH
2.0
0.20
19kV
Wires
KY80/U26
EHT
IH
2.0
0.35
25.5Kv
B9A+tc
50
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
M8091 (SQ)
HW
IH
6.3
1.15
625
125
B9A
18
PY31
HW
IH
17.0
0.30
250
125
IO
55
PY32
HW
IH
29.0
0.30
200
325
700
275
IO
111
PY33
HW
IH
29.0
0.30
200
325
IO
111
PY80
ED
IH
19.0
0.30
400pk
4000
B9A
18
PY81
ED
IH
17.0
0.30
450pk
4750
B9A+tc
34
PY82
HW
IH
19.0
0.30
250
180
700
B9A
18
PY88
ED
IH
30.0
0.30
220
6600
B9A+tc
34
PY301/U191
ED
IH
19.0
0.30
450pk
4500
B9A+tc
34
PY500A
ED
IH
42.0
0.30
440
5600
B9D+tc
8
PY800
ED
19.0
0.30
150
5250
PZ30
2 x HW
IH
52.0
0.30
240
200
IO
52
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
RG1-125
HW/MV
DH
4.0
5.00
1400
250
1250
ES
1938
RG1-240
HW/MV
DH
4.0
2.70
1500
500
1350
B4+tc
31
1938
RG1-240A
HW/MV
DH
4.0
2.70
1670
500
1500
B4+tc
6
1938
RG3-250
HW/MV
DH
2.5
5.00
3500
250
ES
RG3-250A
HW
DH
2.5
5.0
3500
250
B4D+tc
1
RG3-1250
HW
DH
4.0
7.00
1250
8000
ES
RR3-250
HW
DH
2.5
5.00
1700
500
B4D
1
RZ1-75
FW
DH
2.2
4.00
1150
70
B4+2tc
27
1934
RZ1-150
FW
DH
4.0
4.00
1000
150
L4
2
1934
RZ1-250
HW
DH
6.0
2.00
1500
500
L4
3
1934
TY86F Pulsed input
EHT
IH
7.4
77mA
22,000
0.8
B9A+tc
50
UR1
HW
IH
20.0
0.20
250
75
250
Ct8
36
1934
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
UR1C
HW
IH
20.0
0.20
250
120
210
B5
8
1935
UR2
2xHW
IH
30.0
0.20
250
120
250
Ct8
35
1934
UR3
2xHW
IH
30.0
0.20
250
120
270
Ct8
35
1935
UR3C
FW
IH
30.0
0.20
250
120
270
B7
29
1935
UY1N
HW
IH
50.0
0.10
250
140
IO
122
UY21
HW
IH
50.0
0.10
250
140
B8G
4
UY31
HW
IH
50.0
0.10
250
125
IO
55
UY41
HW
IH
31.0
0.10
250
100
B8A
1
UY85
HW
IH
38.0
0.10
250
110
B9A
18

Tuning Indicators

Type
Heater
Anode
Target
-Vg1
Shadow
Base
Year
 
Volts
Amps
Volts
mA
Volts
mA
max/min
angle x°
Type
Ref
Year

 Mullard

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
DM70
1.4
25mA
85
60
0.17
0.10
10/0
7/0
B8D
9
DM160
1.0
30mA
50
0.585
3/0
Wires
EFM1
6.3
0.20
250
250
20/1.5
3/70
Ct8
18
1939
EM1
6.3
0.20
250
0.095
250
0.13
5/0
0/80
Ct8
9
1937
EM3
6.3
0.20
250
0.22
250
0.30
16/5
10/90
Ct8
9
1939
EM4 (Dual sensitivity)
6.3
0.20
250
0.095
250
0.75
16/0&5/0
5/90
Ct8
20
1939
EM31
6.3
0.20
250
5/0
IO
46
WW2
EM34(Dual sensitivity)
6.3
0.20
250
250
0.75
16/0&5/0
5/90
IO
48
1946
EM35
6.3
0.30
250
250
22/0
IO
46
PW
EM80
6.3
0.30
250
2.3
13.0
B9A
41
EM81
6.3
0.30
250
2.3
10.5/1
5/65
B9A
41
EM84
6.3
0.21
250
0.46
250
1.8
21/0*
B9A
56
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
EM87
6.3
0.30
250
250
2.0
21/-1.5*
B9A
56
TV4
4.0
0.30
250
0.095
250
0.13
5/0
10/90
Ct8
9
1936
TV4A
4.0
0.30
200
0.22
200
0.30
18/0
10/90
Ct8
9
1938
No details for TV6 = EM1
1937
UM4 (Dual sensitivity)
12.6
0.10
200
1.4
4.2/0
12.5/0
IO
136
UM34 (Dual sensitivity)
12.6
0.10
250
0.75
16/0&5/0
IO
48
UM80
19.0
0.10
200
7.0
13/0
B9A
41
ZA1004
Cold
83.5-90
1.0
Wires

* Length of column. A negative value indicates overlapping

Thyratrons

Type
Heater
Anode
Control
fmax
Gas
Base
Year
 
Volts
Amps
Pk Volts
Pk mA
Ratio
KHz
 
Type
Ref
Year

 Mullard

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
AN1
4.0
1.45
650
2A
B5
1
EC50
6.3
1.30
1000
750
35
150.0
Ct8+tc
39
PW
EN31
6.3
1.30
1000
750
35
150.0
IO
112
EN32
6.3
0.95
650
2A
IO
126
EN70
6.3
0.15
500
100
B8D
10
EN91
6.3
0.60
650
500
B7G
51
EN93
6.3
0.25
350
110
B7G
72
GT4A
4.0
1.20
300
300
20
B5+tc
13
1936
GT4H
4.0
2.40
1000
750
35
Helium
Ct8
39
1937
M8204 (SQ)
6.3
0.66
500
100
B7G
46
XG-500
2.5*
5.0
2500
2A
USM4+tc
20
Z300T/1267
Cold
225
300
IO
108
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
Z700U
Cold
310
16
Wires
Z700W
Cold
310
16
Wires
Z701U
Cold
165
12
B8D
Z800U
Cold
275
10
B9A
58
Z801U
Cold
170
10
B9A
57
Z803U
Cold
250
50
B9A
51
Z804U
Cold
400
125
B9A
59
Z900T
Cold
200
100
B7G
71

Barretters

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

 Mullard

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
C1
C1C
0.20
90-120
Ct8
B4
8
13
C2
C2C
0.20
40-100
Ct8
B4
8
13
C9
0.20
85-200
Ct8
8
1928
0.18
90-230
B4
13

Voltage Stabilisers

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

 Mullard

 Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless
75B1
75
110
2
22
6
B7G
40
75C1
78
115
2
60
<5
B7G
55
83A1§§
83
130
3.5
6
<1.1
B7G
55
85A1§§
85
125
1
8
--
B8G
41
85A2§§
85
115
1
10
3
B7G
28
85A3
86
125
0.5
3.5
3
Wires
90C1
90
115
1
40
14
B7G
28
95A1
95
110
2
10
5
B7G
40
108C1
108
133
5
30
3.5
B7G
28
150B2
150
180
5
15
5
B7G
55
150B3
153
170
2
20
5
B7G
40
150C4
150
165
5
30
6
B7G
28
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
4687
100
130
10
4
6
Ct8
22
4687A
100
130
10
4
6
B4
12
5644
90
125
5
25
5
B8D
12
7475
100
140
1
8
2
B4
12
13201A
100
135
15
200
2
B4
12
M8098 (SQ) = 85A2
M8142 (SQ) = 85A2
M8163 (SQ) = 150B2
M8190 (SQ) = 85A3
M8206 (SQ) = 90C1
M8208 (SQ) = 150B2
M8224 (SQ) = 108C1
Click for pin-out: B4 - UX4 - B5 - Ct5 - UX5 - UX6 - B7 - B7G - UX7 - B8A - B8B - MO - IO - Ct8 - Footless - B9 - B9A - B9G - B10B - Others
M8223 (SQ) = 150C4
M8225 (SQ) = 75C1

§§ Voltage reference tubes.

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