Ha si même Merlin fait ça au pif
Je n'ai pas trié mes tubes encore
Exact, il donne une approximation toutefois : "However, this method is almost never used in audio today, for many reasons:
• It varies too much with valve samples. As well as collecting electrons, the
grid also collects positive ions and also emits electrons. The rate of
emission depends largely on temperature and contamination of the grid
during manufacture, over which the designer has no control.
• It requires a very large resistance, which introduces too much unnecessary
resistor noise and makes the stage very susceptible to heater hum.
• It is rather unpredictable. Choosing the resistance involves little more than
guesswork, and the voltage developed tends to wander as the valve ages.
As
an approximation, most small signal valves will only develop -0.1V per
meg-ohm when new, which severely limits our biasing range; we would
need a 10MΩ grid-leak resistor just to obtain -1V bias!.
• The large grid-leak resistance is liable to promote blocking distortion (see
chapter 2).
• It does not offer the frequency-shaping advantages of cathode biasing."
"Le métal, c'est plus facile assis, : c'est une musique de salon finalement !" (bonniwell, ex-métalleux)
"Oh justement, moins on en sait, plus on est capable de réellement juger quelque chose. Je suis peut-être pas expert en art, mais j'ai deux yeux, comme tout le monde, je sais distinguer un truc moche d'un truc beau comme n'importe qui d'autre.
Si Van Gogh a passé toute sa vie pauvre et incompris, c'est parce qu'il faisait de la merde, point, il ne savait pas peindre. Des années après sa mort, des "experts" ont décidés que c'était un génie, ça ne change pas pour autant son travail." (King V expert es bon goût)
Le Gecko :
https://www.guitariste.com/for(...).html
