Class A 90% | 450v | Bias | gM | Gain |
Tube | mA | |||
Sovtek 6550WE | 70 | 43.2 | 409 | 7.8 |
Electro-Harmonix 6550 | 70 | 46.7 | 379 | 6.8 |
Tung-Sol 6L6STR | 60 | 40.6 | 401 | 5.8 |
JJ Tesla 6L6GC | 60 | 39.5 | 507 | 7.3 |
Sino 6L6WGS | 60 | 46 | 410 | 5.2 |
Sovtek 6L6WXT+ | 60 | 38.7 | 369 | 5.6 |
Fail Point Sovtek | 60 | 30.3 | 55 | 2.4 |
Fail Point JJ tesla | 60 | 42 | 74 | 3.3 |
Fail Point RCA BK. PT | 60 | 37.7 | 65 | 3.3 |
Fail Point GE | 60 | 36.6 | 70 | 3.1 |
Sovtek 7027 | 60 | 40.2 | 468 | 6.9 |
Tung-Sol 7027 | 60 | 44.7 | 462 | 6.7 |
JJ Tesla 7027A | 60 | 40.2 | 519 | 7.6 |
Class A 90% | 450v | Bias | gM | Gain |
Gold Lion KT66 | 60 | 45.7 | 485 | 7.2 |
Tung-Sol KT66 | 60 | 45.7 | 449 | 6.2 |
JJ Tesla KT66 | 60 | 36.3 | 484 | 7.1 |
Sino KT66 | 60 | 46.4 | 516 | 7.2 |
Tung-Sol 7581A | 60 | 38.8 | 462 | 6.7 |
Gold Lion KT77 | 60 | 28.3 | 752 | 10.7 |
JJ Tesla KT77 | 60 | 34.2 | 766 | 10.8 |
JJ Tesla 5881 | 50 | 42 | 596 | 6.7 |
Sino 5881 | 50 | 40.3 | 484 | 5.6 |
Sovtek 5881WXT | 50 | 40 | 595 | 7.5 |
Sovtek 5881 | 50 | 40.6 | 591 | 7.4 |
Tung-Sol 5881 | 50 | 45.6 | 548 | 6.0 |
Electro-Harmonix 6V6GT | 28 | 37.37 | 529 | 4.2 |
JJ Tesla 6V6S | 28 | 42.5 | 602 | 4.7 |
Tung-Sol 6V6GT | 28 | 40.7 | 477 | 3.7 |
Telefunken 6V6 | 28 | 41.6 | 655 | 5.2 |
Class A 90% | 450v | Bias | gM | Gain |
Electro-Harmonix 6CA7 | 50 | 38.6 | 399 | 4.5 |
JJ Tesla 6CA7 | 50 | 34.2 | 466 | 5.2 |
JJ Tesla E34L | 50 | 35 | 405 | 4.6 |
JJ Tesla EL34II | 50 | 35.3 | 393 | 4.5 |
Electro-Harmonix EL34 | 50 | 35.3 | 395 | 4.6 |
Mullard EL34 | 50 | 36.9 | 434 | 4.8 |
Sino EL34B | 50 | 33.9 | 912 | 10.3 |
Telefunken EL34 | 50 | 36.9 | 467 | 5.2 |
Tung-Sol EL34B | 50 | 32.6 | 330 | 3.8 |
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