| Tube Designation |
Gain Factor |
Can Be Substituted With |
Comments |
| 12AU7 |
19 |
12AV7 |
|
| 12AV7 |
41 |
12AY7 |
|
| 12AY7 |
45 |
12AV7, 12AT7, 5751 |
|
| 12AT7 |
60 |
12AY7, 5751 |
|
| 5751 |
70 |
12AY7, 12AT7, 12AX7 |
|
| 12AX7 |
100 |
12AY7, 12AT7, 5751 |
|
Notes:
1. These tubes have common pinouts (9-pin or Noval) and similar
voltage ratings.
2. Actual gain factors will vary from manufacturer to
manufacturer.
3. Maximum plate current will vary between types of preamp tubes.
The
tubes listed below have several equivalents. The gain factors are
very similar, though.
12AX7 - ECC83, 7025, ECC803, E83CC, 6681
12AT7 - ECC81, 6201, 6679
12AY7 - 6072
12AV7 - 5965
12AU7 - ECC82, 5963, 5814, 6189
You
can further shape your sound by changing the gain factors of the
preamp tubes you use in the preamp modules.
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