Glenn OTL Tube Compatibility
 Share
The version of the browser you are using is no longer supported. Please upgrade to a supported browser.Dismiss

View only
 
 
ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
Tube FunctionTube TypeAdapter RequiredNotes
2
Rectifier422A
Can work with or without adapter.
Read notes...
Glenn: "The 422A is the best rectifier and will work without a adapter but will add 5 volts of 50 or 60 Hz to the power supply.
Normally the power supply will filter this out but why add this in the first place if it can be eliminated by a adapter (that reverses pins 2 and 8)."
3
RectifierU52N/A
4
Rectifier53KUN/A
5
RectifierGZ32N/A
6
RectifierGZ33N/A
7
RectifierGZ34 / 5AR4N/A
8
RectifierGZ37N/A
9
Rectifier596Yes
10
Rectifier1641 Yes
11
Rectifier5R4GYN/A
Glenn: "The 5R4 has the highest voltage drop."
People not impressed with RCA 5R4GY, but Philips, Brimar and Fivre are quite good.
12
Rectifier5U4GN/A
OK when running 6BX7 or 6BL7 (2, 4 or 6 tubes) but not other output tubes!
(Source: Glenn on post # 27864)
13
Rectifier5U4GBN/A
"B" is important. This one does NOT have the limitations of 5U4G (see above)
14
Rectifier3DG4N/A
15
Rectifier5CU4N/A
16
RectifierAZ12AZ12 to 3DG4 adapter from Deyangibosi: AZ12 max at 200ma, so not powerful enough to run GOTL with 6AS7 output tubes. Not powerful enough to run six 6BL7. Fine with four 6BL7.
17
C3g DriverC3gN/A
18
C3g DriverEL8, EL3N, EL6
Deyan's custom adapters for EL3N to c3g
19
C3g DriverEL32, 6J7
Deyan's custom adapters for EL32 to c3g
20
C3g DriverEL11, EL12N, EL13
Deyan's custom adapters for EL11 to c3g
21
C3g DriverEL41, EL42EL42 to C3g adapters@gibosi confirmed EL41 and EL42 tubes work with those adapters!
22
6.3 volt Driver
6SN7, 6SN7GT, 6SN7GTA, 6SN7GTB, 6SN7W, 6H8C, VT-231
N/AAmplification factor of 20
23
6.3 volt Driver
6SL7, VT-229, 5691, 6H9C / 6N9S (Russian), 6N9P (Chinese)
N/ASimilar to the 6SN7 but with higher gain (amplification factor of 70)
24
6.3 volt Driver
ECC35 (British), 33S29 (Swedish), 6SU7GTY (premier 6SL7)
N/AMore 6SL7 variants...
25
6.3 volt DriverECC32, ECC33N/A
26
6.3 volt Driver6N7, 6N7G, 6N7GT, ECC31ECC31 to 6SN7 adapter (from Deyan)
27
6.3 volt Driver6Z7, 6Z7GECC31 to 6SN7 adapter (from Deyan)Reported by @mordy in Aug. 2020 and approved by Glenn. According to mordy:
"bass is very good .... the treble is on the bright side .... mid range is pretty good; BUT there is a rough edgy quality to the sound .... it simply lacks sweetness"
28
6.3 volt Driver6A6 6A6 to 6SN7 adapter
29
6.3 volt DriverEL3NDual EL3N to 6SN7
30
6.3 volt Driver6DJ8, ECC88, 6922, E88CC, 7308, 6N23, ECC804, 6/30L2ECC88 to 6SN7 adapter
31
6.3 volt Driver6CG7, 6FQ7, 6BC8, 6BS8, 6BZ7, 6BQ7A, X155ECC88 to 6SN7 adapter
32
6.3 volt Driver6F8G / VT-99, 6C8G / VT-1636F8G to 6SN7 adapter
33
6.3 volt Driver76 76 to 6SN7 adapter
34
6.3 volt DriverL63, 6J5, CV1932, 6C5G, 6P5Dual 6J5 to 6SN7 adapter
35
6.3 volt Driver5670, 2C51, 6385, 396A, 6N3P5670 to 6SN7 adapter
36
6.3 volt Driver5687, 7044, 7119, E182CC5687 to 6SN7 adapter
37
6.3 volt Driver7N77N7 to 6SN7 adapterLoctal base version of 6SN7
38
6.3 volt Driver7F7, VT-189, CV8937N7 to 6SN7 adapterLoctal base version of 6SL7GT (similar to the 7N7 but with higher gain)
39
6.3 volt Driver6C4 / CV133 / 6100 / EC90Dual 6C4 to 6SN7 adapter
40
6.3 & 12.6 volt Driver
12AU7, M8136, CV4003, E82CC, E180CC
12AU7 to 6SN7 (6v) or 12SN7 (12v) adapter
12AU7 & 12AT7 use same adapters. Operate at 6v or 12v (depending on adapter used).
41
6.3 & 12.6 volt Driver
12AT7, 12AZ7, 12BH7
12AT7 to 6SN7 (6v) or 12SN7 (12v) adapter
12AU7 & 12AT7 use same adapters. Operate at 6v or 12v (depending on adapter used).
42
12.6 volt DriverB36N/A
43
12.6 volt DriverFDD20 FDD20 to 12SN7 adapter
44
12.6 volt Driver12SN7, 12SL7GT, 12SX7N/A12v version of 6SN7
45
12.6 volt Driver14N7, 14H77N7 to 6SN7 adapter12v version of 7N7
46
12.6 volt Driver12J5Dual 12J5 to 12SN7 adapterGlenn confirmed that it would work and sound great
47
25.2 volt Driver13D1N/A
48
25.2 volt Driver1633N/A
49
Power / Output6AS7G, 6AS7GA, CV2523/A1834N/AUse 1 or 2 pairs
50
Power / Output5998, 6520, 421AN/AUse 1 or 2 pairs
51
Power / Output6080, 6080WB, CV2984N/AUse 1 or 2 pairs
52
Power / Output6336BN/ADo not use more than 1 pair!!
53
Power / Output7236N/AUse 1 or 2 pairs
54
Power / Output6H13C, 6N13P, 6N5P, 6N5SN/AUse 1 or 2 pairs
55
Power / Output6BX7GT N/AUse 2 or 3 pairs
56
Power / Output6BL7GT, 6BL7GTAN/AUse 2 or 3 pairs
57
58
NOT Compatible!!!
6L6GC (or the Russian equivalent 6N3C)N/AListed to prevent repeated questions from newbies like me ;-)
59
NOT Compatible!!!
6V6N/ACompatible with GEL3N amp, but not for GOTL
60
NOT Compatible!!!
KT88N/A@UntilThen: "KT88 in the GOTL will be more lethal than 10 shots of Tequila"
61
NOT Compatible!!!
EL34 / 6CA7 N/AGlenn: "They are single pentodes the OTL needs a dual triode."
62
NOT Recommended
12AX712AU7 to 6SN7 or 12SN7Would work but amplification too high to be useful
63
NOT Recommended
7AF7, 14AF7They work but turn microphonic or become noise.
64
NOT Recommended
7802 (look almost identical to 6080)N/A
Glenn: "I do not recommend using the 7802 in this amp. They require a 500 ohm cathode resistor and the ones in the amp are 1/2 that so the tubes will be over current
and get very hot and probably ruin them."
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Loading...