De ce que j'ai compris, les pédales étaient très inconsistantes à cette époque, et d'un mois à l'autre, elles pouvaient sonner différemment.
Electro Harmonix utilisaient des composants, et lorsque ceux-ci manquaient ou coûtaient trop chers sur le marché, ils changeaient pour d'autres composants avec parfois des valeurs différentes.
Kit Rae a fait une démo de ceci concernant les Big Muff Triangle, mais c'est la même chose pour les Ram's Head :
Concernant la Ram's Head qui nous intéresse ici, Kit Rae explique que pour sa Big Muff qui a été répliquée par Electro Harmonix, les valeurs des composants n'étaient plus du tout dans les tolérances. Il a fallut dessouder chaque composant de la pédale pour mesurer sa valeur réelle et trouver des équivalents actuels.
Kit Rae a écrit :
I told him in the beginning he could pull parts and measure them only if he absolutely needed to - hoping that would not be necessary - but I knew that was the only way to get it accurate. You can't accurately measure them when in the circuit. He did have to pull and measure every single part. I just looked at the actual value schematic, and - wow - the measured parts values on several of the key components that make up the tone are very different. Different enough that I question if some of those caps were mis marked when they were originally made. This was the circuit board, before dissection.
.../...
What I am talking about are the printed electrical values on the actual capacitors and resistors of my original. Those are supposed to be what the parts measure, within a tolerance difference, but they can change over time as the parts age.
Cloning those printed measurements did not sound the same as my original, so all the parts were pulled from the circuit to see what the actual measured values were. Some were within the tolerance, but most of the key caps and resistors were very different. Like a 470k feedback resistor and 500pf filter cap that actually measure 571k and 602pF. Once the real values were matched, the clone sounded the same, or as close as EHX could get. I'll know for sure in a few days when my reissue arrives.
