Tubes

The tubes we list here also have several alternate names, which we list below. Note that the alternates do not have significantly different gain factors, they are simply a different name for the same thing.

12AX7 - ECC83, 7025, ECC803, E83CC, 6681
12AT7 - ECC81, 6201, 6679
12AY7 - 6072
12AV7 - 5965
12AU7 - ECC82, 5963, 5814, 6189

Gain Factor 
-----------
12AX7  => 100%
5751   =>  70%
12AT7  =>  60%
12AY7  =>  45%
12AV7  =>  41%
12AU7  =>  19%

Power Tubes
-----------
EL34 / 6CA7 / KT77 Tubes
EL84 - 6BQ5 Tubes
KT66 Tubes
KT88 Tubes
6L6 / 5881 Tubes
6V6 Tubes
6550 Tubes
300B Tubes
2A3 Tubes
6146 Tubes
6AS7 Tubes
6BM8 Tubes
7027 Tubes
7591 Tubes
7868 Tubes
211 Tubes
807 Tubes
845 Tubes
Big Powers Tubes

Rectifier Tubes
With Cathode
5V4
5AR4
6CA4
GZ34

Without Cathode Use Direct filament
5Y3
5U4
5Z3
6AX4
5R4