Conception et réalisation d'un micro à tube basé sur le Neumann M49

je ne trouve pas que reguler l'alime 6.3v pose des problemes a mon oreille

Dont worry i have all the version For the Round Body B, C just ask for it, even the M50B round, that it is just too much pcb , I have both B, C square also , the issue is that the psu pcb is only working for the C version wich is not very picky about hummy-Supply not even sure about LM supply style either , i am working on making another one specially for Filament Bias B version all passive. Last Thing i need to work out as the coming M269 is fixed bias and the supply will work for both.

the capsule are K47-M7 type as for tuning the stock value K bias 2.2K, and 100K plate of the self biased c version get very very close to the spot as 52V for the plate and 1.55V for grid Bias for the 5840 , I also built a B version but i need to redo the power supply for this one as for the M269 wich will be a b version it did not work hum free ,
both installing a 1M pot i was able to tune the bias on spot .
Let me know,

All version are available so please do ask , the only thing is that the current pcb supply will support the c version.

I am not even sure if LM317 Style regulation will be enough in this b version.

This is going to be called Choke Time ,

Dany,

As tu testé avec succès l'utilisation du 6,3V régulé pour polariser la grille ???

la solution diode zener est pas mal

tien au passage tu as mis un condo ero dans le tien bigdad ?

Attention les zener c'est bruyant !

Je n'oublie pas qu'un filtrage de qualité doit être fait sur l'alimentation, après régulation, car le signal passe par les condos en sortie d'alim... si, si, le courant drainé c'est le signal... d'où l'intérêt de la peaufiner, cette alim. Et de mettre des condos de qualité.