Préampli NEVE 1063 , ou 3405 / 3415

Citation : my goal was to make a old version of 312, so I digged the old opamp and discovered that Cinemag (formely Riechenbach) did one of the first trafos they used on 312

this trafo I am talking about is CM75101

yes 2622 from Sowter is a clone from a original 2622
but never heard it

today API uses JT115k on their 312 which is CMMI10B from cinemag

I really like the sound of CM75101... it does what I want to sound
I went for 75101 cos guys at Cinemag told me that this one was used at that time

2622 is 1:7 or 1:8 ratio... 75101 is 1:10

75101 price is unbeatable, like $44!

noise with 1:8 will be a litle better that with 1:10

but for most things like rock, 1:10 performance is fine

CMMI-8 is a very fine choice also

1:10 saturates first than 1:8

you get 20dB out of a 1:10 trafo, which I like to ' make a sound'

combinations are endless, I have tried CMMI-8C and liked it a lot, more body, cleaner sound. CMMI-5C is also very nice, lots of bass and sweet top end

less iron gain cos it is 1:5

this is really a matter of taste, good thing is to try then all, like I did and then choose the one that gives you the sound you want

I suggest 75101 , it has 150 or 600 primary so you can add a impedance switch that will have you more options on sound also

75101 fits the board, 2622 from sowter do not and 75101 is probably cheaper

in conclusion : most colored is 75101+2520 and most polyvalent is cmmi5c+2520
to my taste

Citation : Bioman le 2520 c'est l'Opamp de la carte -)

Citation : A ce que j'ai pu lire auparavant ; il me semble oui effectivement que c'est le meilleur choix ; a comparer de toute facon.
Perso j'ai pris les transfo de sortie a Fabio , pareil a ecouter ...

Pour la Psu , elle peux faire 4 preampli en meme temps , parcontre il faut changer les relays TQ2-5V par des TQ2-24 v sur la carte et changer Le REG_SW par un LM7824 et mettre des bons dissipateurs de chaleurs sur les regulateurs .

Citation : Non phaz , pas Encore ! Mais jai deja une partie pour un premier essai.
C'est en discutant avec fabio il m'a dit de faire ces changements parceque je souhaite alimenter 4 cartes avec la PSU absolument . C'est juste pour eviter que ca chauffe trop je crois .

( PS/ mes capacites en electronique et electricité sont tres minces ... -)