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Tube Interchangability Reference

The following should be direct substitutions. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. Tubes in the "Tube" column are directly replaceable with tubes in the "Replacement" column. The reverse will not necessarily be a correct replacement. Please report any errors.

Tube prefix selection

0 1 2 3 4 5 6 7 8 9 10 12 13-117 VT Numeric Letter


TubeReplacement TubeReplacement
27




32








34





35
37

39


39/44


44


51
56
76
77
78


80



81


83
84
182B
183B
408A
482B
483
684
807
866
879
884
951

CK1005


CK1013
1201
1203
1204
1206
1221
1223
1229
1230
1231
1232
1267
1273
1274


1275


1280
1284
1291
1294
1299
1612
1614
1620
1621
1622
1634
1642
1644

1852


1853
2050
2051
2523
5517


5590


5591
5608-A


5654


5670
5691
5672
5678

5691



5692


5693


5725



5726



5727


5731


5749




5750




5751




5814




5824




5881



56

1A4
1A4P
1A4T
1B4
1B4P
1B4T
34
951

1A4
1A4P
1A4T
1B4
1B4P
1B4T
34
951

51
76

39/44
44

39
44

39
39/44

35
27
37
6C6
6D6

5X3
13
83V
88

16
16B

5Z3, 80
6Z4
482B
483
6028
182B
183B
2Z2
5933
866A
2X2A
6Q5
1B4P

0Y4
0Z4A

5517
7E5
7C4
7AB7
768
6C6
6J7
1A4
30
7V7
7G7
0A4
7A7
6X5

5X3
80
83

14H7
12B7
3B7
1R4
3D6
6L7
6L6
6J7
6F6
6L6
12SC7
2C21
12L8

6AC7
6134

6AB7
2051
2050
128A
CK1003

5591
9001
9003

5590
53

6AJ5
6AK5
EF95

2C51
6SL7
5678
5672

6SN7
5692

5691
6SN7
ECC33

6SJ7

6AJ5
6AK5
6AS6

6AL5
6663
EB91
EAA91

2D21
EN91

955

6BA6
6660
EF93
PM04

6BE6
EK90
HM04

12AX7
6681
ECC83
12DT7
7025

12AU7
6189
6680
ECC82

25A6
25B6
25C6
25L6

6L6GC
7581
7581A
5932
EL37
5910


5915


5930
5931


5932


5933

5965



6005



6028
6072


6073




6074


6080

6087


6098

6106


6134


6135


6136


6137
6186
6188


6189





6201




6202



6265


6267


6281


6626




6627



6660



6661


6662


6663




6669




6676



6677

6678




6679




6680





6681



6688

6829


6922




7025





7036


7077
7196
7247
7408

7543


7581


8016
1U4

6BE6
6BY6
7036

2A3
5U4

6L6
5881
EL37

807

12AV7
6829

6AQ5
6669
EL90
N727

408A
12AY7

0A2
150C2
6676
6626

0B2
108C1
6627

6AS7

5Y3
6106

6AR6

5Y3
6078

6AC7
1852

6C4
EC90

6AU6
EF94

6SK7
6AG5
6SU7

12AU7
ECC82
6680
5814

12AT7
6679
ECC81
B152
B309

6X4
EZ90
U78
V2M70

6BH6
6661

EL84
6BQ5

CK574

0A2
150C2
6073
6676

0B2
108C2
6074

6BA6
5749
EF93
PM04

6BH6
6265

6BJ6

6AL5
5726
EB91
EAA91

6AQ5
6005
EL90
N727

0A2
150C2
6073
6626

6CL6

6U8
ECF82

12AT7
ECC81
6201
b152
B309

12AU7
6189
5814
ECC82

12AX7
5751
12DT7
7025
ECC83

E180F

5965
12AV7

E88CC

7025A
5751
6681
12AX7
12AX7A
12DF7
12DT7
ECC83

6BY6
5915

6BY4
2C22
12DW7
6V6

6AU6
6AU6A

7581A
6L6GC

1B3

Last update: 23 Mar. 2008